general online quest

8/21/2019 General Online Quest

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1. Which of the refrigerants listed is considered safe and ideal for mostmarine applications?-R-21-ammonia

-R-12-sulfur dioxyde

2. In reference to air conditioning, hen air attains the maximum amountof moisture it can hold at a speci!c temperature, it is said to "e-superheated-saturated-condensed-con#ected

$. Which of the folloing terms represents the form of heat remo#ed fromthe refrigerant in the condenser of a refrigeration system?-latent heat of #apori%ation-heat of compression-superheat-all of the a"o#e

&. 'he temperature at hich ater #apor in the atmosphere "egines tocondense is called the-de point temperature-condensation temperature-psychrometric temperature-a"solute humidity temperature

(. In a refrigeration system, the refrigerant a"sor"s the latent heat of#apori%ation in the-compressor-condenser-recei#er-e#aporator

). 'he only means of remo#ing the latent heat of condensation from arefrigerant in the normal refrigeration cycle is "y-passing it through the expansion #al#e-condensing refrigerant in the system condenser-passing the gaseous refrigerant through the heat interchanger on the suctionside of the compressor-maintaining a high pressure on the system*s recei#er

+. 'he heat reuired to change a su"stance from a solid to a liuid hile

at its free%ing temperature, is non as the latent heat of-fusion-#apori%ation-condensation-su"limation

8. 'he heat reuired to change a su"stance from a liuid to a gas ithoutexperiencing a temperature change, is de!ned as the latent heat of-fusion


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-#apori%ation-su"limation-condensation

. /eat hich "rings a"out a change in the physical state of a su"stanceithout a change in temperature, is called

-speci!c heat-sensi"le heat-latent heat-am"ient heat

10. atent heat can "e de!ned as the heat hich must "e added to asu"stance in order to change it from a-solid to liuid-liuid to #apor-solid to #apor-all of the a"o#e

11. ersonnel oring ith refrigeration systems, and su"ect to theexposure of refrigerants should ear-face shield-a respirator-ru""er glo#es-an all purpose gas mas

12. 'he amount of moisture in a gi#en sample of air, hen compared iththe amount of moisture the air could hold if totally saturated at theexisting temperature of the sample, is called-a"solute humidity-speci!c humidity-e3ecti#e humidity-relati#e humidity

1$. 'he ratio of the eight of moisture contained in a gi#en #olume of air,to the eight of moisture that the same sample ould hold if saturated,is called the-a"solute humidity-relati#e humidity-speci!c humidity-total humidity

1&. 'he moisture sensiti#e element of a humidistat can "e made of-hair-copper-plastic-steel

1(. When handling contaminated oil from a hermetically sealed refrigerationcompressor unit that has "urned out its motor, you shoulda.store the oil in a clean refrigerant drum".use ru""er glo#esc.circulate the oil through a !lter drierd.remo#e the oil ith a porta"le charging cylinder

1). When replacing "all "earings on an electric motor shaft, you should


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-tap the outer race ith a mallet-apply e#en pressure to the outer race-apply e#en force to the inner race-apply pressure e#enly to "oth the inner and outer races

1+. eople familiar ith ammonia refrigeration systems "ecome accustomed

to its odor and may forget that the #apors-in a lo concentration can cause death-ill dissol#e in pespiration and cause caustic "urns-ill "urn or explode-all of the a"o#e

18. 4mmonia hen used as a refrigerant is #alua"le "ecause of its highe5ciency, it is hoe#er-toxic-6amma"le-explosi#e-all of the a"o#e

1. When su"ected to high heat from an open 6ame, or an electric heatingelement, hich of the listed refrigerants ill "rea don and producephosgene gas?-72-methyl chloride-R-22-sulfur dioxide

20. When the relief #al#e opens it discharges high pressure refrigerant#apor to the-liuid strainer-refrigerant inlet of the condenser-inlet side of the e#aporator-suction side of the compressor

21. In the presence of an open 6ame or hot surfaces, chlorinated6uorocar"on refrigerats decomposes and form-petroleum crystals-phosgene gas-ater #apor-car"on monoxide

22. R-12 is generally considered to "e a safe, nontoxic, non6amma"le,and nonexplosi#e refrigerant. It can, hoe#er, "ecome highly toxic hen-superheated outside the system-in contact ith an open 6ame-heated to the "oiling point

-all of the a"o#e

2$. 4 refrigeration system contaminated ith moisture can "e a3ected "y4.acid formation".sludge formationc.ice in the expansion #al#ed.all of the a"o#e

2&. 9ome chloronated 6ourocar"on refrigerants may decompose into a toxic


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irritating gas if it is-stored at temperatures "elo 107-charged into a system ha#ing copper !ttings-alloed to mix ith compressor oil-exposed to an open 6ame or hot surfaces

2(. :or the proper control of the air temperature in an air conditioningsystem using chilled ater circulation, hich of the listed conditionsshould remain constant regardless of load changes?-chilled ater system supply temperature-chilled ater system return temperature-compressor discharge temperature-compressor suction pressure

2).In a direct expansion type multi-"ox refrigeration system, the compressoris set up to cycle on and o3 "y the-pressurestat-high pressure cut out-solenoid #al#e-lo pressure cut out sitch

2+. Which of the listed operations ill cause an automatically controlledRefrigeration compressor to restart?-closing of the solenoid #al#e-closing of the expansion #al#e-an increase in the suction pressure-decreasing the suction pressure

28. 9altater is typically pro#ided to a refrigeration system to-cool the expansion #al#e-pre#ent refrigerant superheating-condense the refrigerant gas-pre#ent motor o#erheating

2. In a direct expansion type cargo refrigeration system, a "ox isnormally changed from chill to free%e "y adusting the-hand expansion #al#e-compressor suction #al#e-solenoid "ypass-"ac pressure regulating #al#e

$0. 4 pressure drop in the liuid line of a refrigeration system may cause-the solenoid #al#e to sei%e-the compressor to hunt-6ash gas to form in the liuid line-the expansion #al#e to free%e open

$1. ;oisture is remo#ed from a refrigeration system "y-"leeding refrigerant from the condenser-opening a drain petcoc on the oil separator-condensing the ater in the heat exchanger-using a dehydrator cartridge

$2. ;oisture in the refrigerant may-free%e on the expansion #al#e seat and reduce the 6o of liuid refrigerant


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-emulsify the oil in the condenser-free%e in the ing #al#e-clog the oil trap

$$. ;oisture entering a typical refrigeration system ill most liely-"oil in the condenser

-"e remo#ed "y the liuid line strainers-cause seating and frost on the e#aporator coils-free%e in the expansion #al#e

$&. ;oisture in a refrigeration system can cause-free%ing the expansion #al#e closed-corrosion of system piping-improper temperature regulation-all of the a"o#e

$(. Which of the pro"lems listed could "e indicated if a sight glass in therefrigerant liuid line is full of "u""les?-proper refrigerant charge-faulty expansion #al#e-insu5cient refrigerant-solenoid #al#e stuc open

$). 9ome refrigeration systems ha#e chemical moisture indicators installedin conunction ith the sight glass in the liuid line. If excess moistureis present in the system, the indicator ill-acti#ate the driers-change color-secure the compressor-add the predetermined amount of liuid drier

$+. 4 liuid indicator sight glass is useful in determining hether or nota refrigeration system is su5ciently charged. It is generally located inthe-high pressure liuid line-lo pressure liuid line-high pressure #apor line-lo pressure #apor line

$8. If a liuid sight 6o indicator in a refrigeration system shos gas"u""les in motion passing inside of the glass, there is-too much refrigerant in the system-oil entrained in the refrigerant-less then a full charge of refrigerant in the system-ice crystals forming in the refrigerants$. 4 sight glass is installed in the liuid line to indicate the condition

of the refrigerant charge and may also indicate the-condition of the expansion #al#e-moisture in the system-condition of the compressor suction #al#es-condenser temperature

&0. 4 liuid sight 6o indicator in a refrigeration system is examined andgas "u""les are noted in motion ith the 6uid 6o. 'his means-the system is fully charged


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-there is air leaing in from the condenser-ice crystals are forming in the refrigerant-the system contains less then a full charge of refrigerant

&1. In an operating refrigeration system lo on refrigerant, a liuid line

sight glass ill-"e clear-"e "lue-"e light green-sho "u""les

&2. If the refrigeration compressor crancase is seating, the cause may "edue to-a shortage of refrigerant-the compressor running continuously-liuid refrigerant returning to the compressor-the compressor short cycling on the high pressure cutout

&$. If the suction line "eteen the e#aporator and compressor is frostingup, the cause may "e due to the thermal expansion #al#e-thermal "ul" coming loose from the suction line-needle #al#e is stuc closed-thermal "ul" is in a cold air stream-all of the a"o#e

&&. If a refrigerating compressor crancase is seating, the trou"le could"e caused "y-excessi#e superheat-a minor amount of air in the system-normal oil circulation ith the refrigerant-the expansion #al#e "eing stuc in the open position

&(.:rosting or seating of the suction line of a reciprocating refrigerationcompressor indicates a condition hich could result in se#ere damage due to-minor amout of oil in the refrigerant-liuid slugging-insu5cient refrigerant-a failed heat interchanger

&). 4 refrigeration system compressor crancase is seating or unusually 7old.'his is an indication of-a shortage of refrigerant in the system-air in the system-an accumulation of liuid refrigerant in the crancase-a shortage of oil in the crancase

&+. Refrigeration system compressor crancase seating is an indication of-insu5cient lu"e oil circulating throgh the system-excessi#e circulation of lu"e oil through the system-insu5cient refrigerant in the system-an o#erored compressor

&8. 9eating of the refrigeration system compressor crancase is caused "y-too much superheat


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-insu5cient superheat-suction pressure too lo-excessi#e refrigerant returning to the compressor

&. 7rancase seating in a refrigeration system is caused "y-a stuc solenoid #al#e

-a shortage of refrigerant-too much oil in circulation-too much superheat

(0. roperties of good refrigeration oil include-lo ax content-high pour point-high #iscosity-all of the a"o#e

(1. il separators installed in refrigeration systems ser#e to-remo#e excess oil from the system-remo#e oil entrained in high pressure liuid line-return oil entrained in refrigerant #apor "ac to the compressor crancase-all of the a"o#e

(2. 4n oil separator is a de#ice used to remo#e oil from the-liuid refrigerant-recei#er-gaseous refrigerant-expansion #al#e

($. 'he oil separator


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-an electric system manager-a sensing "ul" at the tail coil of the e#aporator-pressure changes in the suction line-failure of the ing solenoid #al#e

(8. When you adust thermostatic expansion #al#e-refrigerant must "e "led o3 the sensing line "efore adustments are made-all refrigerant must "e pumped into the recei#er "efore adustments are made-time must "e alloed for conditions to sta"ili%e in the e#aporator "eforefurther adustments are made-all refrigerant must "e routed through the dehydrator hile changing thesuperheat setting

(. 4 thermostatic expansion #al#e is properly controlling e#aporatorsuperheat. 4dusting this #al#e to loer the superheat ill result in a>an-e#aporator pressure decrease-e#aporator coil o#er-feed-e#aporator capacity increase

-expansion #al#e diaphragm rupture

)0. o compressor head pressure in a refrigeration system can "e caused "y-insu5cient condenser cooling ater-excessi#e condenser cooling ater-air in the refrigeration system-excessi#e refrigerant in the system

)1. Which of the pro"lems listed ould cause the discharge temperature ofan R-12 refrigeration compressor to increase?-thermal expansion #al#e fro%en open-suction gas heat exchanger "ypassed-condenser clogged or fouled-high pressure cutout sitch inoperati#e

)2. ne cause of high head pressure occurring in a refrigeration system can"e-insu5cient cooling ater 6o to the condenser-a lo refrigerant charge in the system-the liuid #al#e is open too much-high e#aporator superheat

)$. If the head pressure of a reciprocating refrigeration compressor isexcessi#e,-the relief #al#e should open "efore the high pressure cutout-the relief #al#e should open and allo the excess refrigerant to 6o tothe recei#er-the high pressure cutout sitch should operate "efore the relief #al#e opens-you should close in on a suction #al#e

)&. If the refrigeration compressor as de#eloping higher than normaldischarge pressure, this could "e a result of-air or non-condensa"le gases in the system-leaing discharge #al#es-leaing suction #al#es-liuid refrigerant 6ooding "ac from the cooling coil


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)(. If the ater failure sitch should fail to shut don the refrigerationcompressor, the refrigerant pressure ill "uild up in the high pressure sideof the system to the point here the-compressor discharge #al#es ould "e damaged

-condenser tu"es ould rupture-system relief #al#e ould open-high pressure cutout sitch ould function

)). /igh suction pressure to a refrigeration system compressor is caused "y-the expansion #al#e is insu5ciently opened-the expansion #al#e "eing open too ide-the ing #al#e is insu5ciently open-a dirty dehydrator

)+. If a refrigeration compressor had de#eloped a high suction pressure,the pro"lem could "e a result of-a minor accumulation of air or uncondensa"le gases in the system-a leaing ing #al#e-a clogged su"cooler-liuid refrigerant 6ooding "ac from the cooling coil

)8. Which of the conditions listed could cause excessi#ely lo refrigerantpressure at the compressor suction?-insu5cient 6o of condenser cooling ater-the system is lo on refrigerant-the solenoid #al#e to the chill "ox is fro%en in the open position-the high pressure cutout sitch is inoperati#e

). If a refrigeration compressor has de#eloped a high head pressure asa result of a refrigerant o#ercharge, you should-increase the amount of cooling ater to the condenser-decrease the amount of cooling ater to the condenser-add more refrigerant to the system-remo#e some refrigerant from the system

+0. Which of the conditions listed may "e an indication of an excessi#eamount of refrigerant circulating through the system?-seating of the compressor crancase-colder than normal solenoid #al#e-frosting of the e#aporator-eeping at the purge #al#e

+1. eaing suction #al#es in a refrigeration compressor are indicated "y-higher than normal suction pressure

-loer than normal suction pressure-loer than normal e#aporator temperature-noticea"le increase in compressor noise

+2. If the discharge #al#es on the refrigeration compressor are leaing"adly, the compressor should-run continuously-not start-ha#e high discharge pressure


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-short cycle on the high pressure sitch

+$. 'o correct the condition of slugging and 6ooding "ac in arefrigeration system, it may "e necessary to-re-adust the discharge pressure-clean the expansion #al#e screen

-add refrigerant-adust the expansion #al#e

+&. @oise in a refrigeration compresoor can "e caused "y-orn "earings and piston pins-slugging due to 6ooding "ac-too much oil in circulation-all of the a"o#e

+(. If a refrigeration system ere short of refrigerant, the conditionould result in-continuous running of the compressor-high suction pressure-high discharge pressure-short cycling of the compressor on the ater failure sitch

+). 4 armer than normal compressor suction line might "e caused "y-insu5cient lu"rication-insu5cient refrigerant-excess refrigerant-excessi#e opening of the expansion #al#e

++. Which of the conditions listed ill cause a refrigeration compressorto run constantly ithout simultaneously decreasing the temperature in therefrigerated space?-shortage of refrigerant oil-slight shortage of refrigerant-excessi#e condenser cooling ater 6o-faulty expansion #al#e+8. :rost appearing on the e#aporator coils of a multi-"ox direct expansionrefrigeration system-is "est remo#ed "y means of ice pic-ill increase the refrigeration e3ect-can "e remo#ed "y passing hot #apors through the coils-can "e uicly remo#ed "y simply shutting don the coils

+. In a compression refrigeration cycle, the temperature of the liuidrefrigerant experiences its greatest decrease in the-e#aporator-compressor

-expansion #al#e-condenser

80. 4n increase in the heat load to a refrigeration system ill cause-the suction pressure to decrease-the suction temperature to increase-increased ice formation on the e#aporator coil-excessi#e short cycling of the compressor


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81. 4 "ilge pump fails to tae suction if either

"ilge

separator tan

7. 'ransfer the oily mixture using a porta"le pneumatic pump to a aste oil tan

and then physically demuc and clean the "ilge ells using en#ironment

friendly cleaner

A. Ailute the "ilge ells "y 6ooding ith ater and then use the general ser#ice

pump to pump out the "ilges

8&. 'he static suction head of a pump is the

4. distance of the suction liuid le#el a"o#e the center line of the pump

C. distance the suction liuid le#el is "elo the center line of the pump

7. force necessary to o#ercome frictional losses in the pump and piping

A. amount in inches of mercury the total suction head is "elo atmospheric

pressure

8(.Cac pressure #al#e in a refrigeration system ith multiple cham"ers is

!ttedBBBBBBBBBBBBB

4. 4t the refrigerant exit end of e#aporator of each cham"er

C. 4t the refrigerant exit end of e#aporators of cham"ers ith higher temperature

settings

7. 4t the refrigerant exit end of e#aporators of cham"ers ith loer temperature

settingsA. @one of the a"o#e

8).9alinity of distilled ater produced from fresh ater generator on"oard

depends on

4. 4mount of feed set in fresh ater production

C. 4mount of salt ater leaing from condenser if any


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7. 'emperature of the sea ater used

A. D5ciency of "rine eector from the e#aporator shell

8+.Cetter freeing arrangements on taner decs inform of open rails for (0F of

length are pro#idedG4. 'o ensure no seaater gets into the tans.

C. Cecause taners ha#e less free"oard.

7. Coth 4 and C

A. @one of the a"o#e

88.Which of the folloing layers of a thin shell "earing gi#es it its fatigue

strength?

4. 'he o#erlay

C. 'he interlay

7. 'he "acing

A. 'he "arrier layer

8.In a uni6o sca#enged marine 2-stroe diesel engine, the sca#enge ports in a

cylinder liner are machinedG

4. nly for a part of the circumference, at an angle almost tangential to the

circumference of the liner

C. 4ll around the circumference at right angles to the circumference of the liner

7. only for a part of the circumference, at right angles to the circumference of the

liner

A. 4ll around the circumference at an angle almost tangential to the

circumference of the liner

0.It is a non fact that centrifugal pumps reuire priming for pumping liuids ,

as they cannot handle air and ill lose suction due to air entry . Cut on the other

hand '>7s use centrifugal compressors for supercharging . Which of the folloing

do you thin maes a centrifugal compressors to pump air and "eha#e di3erently

than the centrifugal pumps?

4. resence of air cooler

C. resence of a"yrinth seal

7. /igh speed of rotation , #ery !ne internal clearences and large impeller

diameters

A. Ai3erence in principle of operation

1.'he steels ith a car"on percentage close to 0.8F ha#e

4. poor strength "ut good elda"ility

C. /igh strength "ut poor elda"ility

7. oor strength and poor elda"lity

A. /igh strength and good elda"ility

2.4 refrigerant compressor ill run continuously hen there is


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4. 'oo hea#y cooling load on the system

C. 4ir in the system

7. Insu5cient refrigerant in the system

A. 4ny of the a"o#e

$.'he gland pacing on centrifugal pump shaft shouldG

4. @ot allo any leaage under positi#e suction pressure

C. 9hould only allo drop "y drop continuous leaage under positi#e suction

pressure

7. 9hould only allo drop "y drop continual leaage under positi#e suction

pressure

A. 9hould allo considera"le leaage as gland pacings are meant to allo

considera"le leaage

H&.Dxcessi#e lu"rication in compressors can lead toG multiple

4. 9ticing of #al#es

C. 7arryo#er and deposit of oil particles in pipelines and reser#oirs

7. Aecompression

A. Aetonation

(7orrosion protection of steel surfaces "y %inc coating can "e carried out only at

temperatures "elo )( Aeg. 7 . :or higher temperatures G

4. inc reacts #ery fast and thus can only pro#ide protection for a limited time

C. inc reacts ith steel and protecti#e layer #anishes due to chemical reaction

7. 9teel may corrode preferentially to the %inc

A. Ae%inci!cation occurs leading to remo#al of %inc coating

).'he pumps performance depends upon

4. 7learance "eteen the ear ring and the impeller

C. 7learance "eteen the impeller and the casing

7. 7learance "eteen impeller and shaft

A. 7learance "eteen mechanical seal and shaft

+.'he type of corrosion normally occurring in cooling :resh Water systems of

;arine Aiesel Dngines is G

4. 9tress corrosion

C. /ot corrosion

7. Cimetallic corrosion

A. 9electi#e hase corrosion


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8.'he most important control measure to pre#ent "oiler tu"e failure isG

4. Ese of proper refractory material

C. roper maintenance of fuel "urning euipment

7. roper maintenance of "oiler ater condition

A. 4ll of the a"o#e

.It is gi#en that engine room "ilge pump has suction manifold on hich $ #al#es

are located. ne #al#e for the $ engine room "ilge ells suction, another one for

Cilge tan suction and the third one is for sea ater suction. It is found that the

Cilge pump is una"le to tae suction from any of the "ilge ells, "ut is a"le to

tae suction e5ciently from Cilge tan. What is the most pro"a"le cause?

4. ump suction !lter co#er gaset leaing

C. 9uction !lter co#er gaset of one of the Cilge ells is leaing

7. Cilge ell suction pipeline leaing "eteen indi#idual "ilge ell #al#es and

suction manifold #al#e

A. Cilge pump suction pipeline leaing "eteen the manifold and the pump

100.;ost steam traps respond ell to cleaning. Cut hen a thermodynamic trap

fails to operate after cleaning, the next course of action should "eG

4. 'hrottle the steam outlet #al#e

C. Rene the trap

7. ap the disc and the seat of the trap

A. 'hrottle the steam inlet #al#e

101. When centrifugal pump is changed o#er for pumping a liuid of higher

speci!c gra#ity hich of the folloing is going to change?

4. Aischarge pressure

C. Aischarge head

7. oer consumption

A. ump speed

102. 4uxiliary engine connecting rod "ottom end "olts should "e tightenedG

4. nly as per the prescri"ed torue using a torue range

C. 4s per prescri"ed torue as ell as angular measurements as recommended "y

the manufacturer.

7. Cy folloing pre#ious match mars on "olt heads and connecting rod "odyA. 4s per prescri"ed torue and another 10F increase during e#ery su"seuent

tightening. J

10&.Why are large centrifugal pumps started ith their discharge #al#es closed?

4. 'o ensure proper priming

C. 'o limit sudden rise in discharge rate


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7. 'o limit motor starting current

A. 'o minimi%e starting torue on motor shaft

10(..Which of the folloing statements are true as far as painting of steel

hull>structure is concerned? ;ultiple choice

4. ainting can "e done under any eather condition

C. ainting can only "e done after proper surface preparation is carried out

7. ainting should only "e done on top of appropriate primer coating

A. 9e#eral coats of paint can "e applied one after the other ithout any time gap

10).When one of the ;>D :.. heater is not in use, thenG

4. 'he :.. inlet K outlet #al#es should "e ept shut, "ut steam heating #al#es

should "e ept crac open, so as to eep the heater arm

C. :.. inlet K utlet #al#es should "e ept shut, steam heating #al#es also should

"e completely shut and heater should "e drained of any remaining :..

7. :.. inlet and outlet #al#es should "e ept crac open so that the :..recirculation through the heater can tae place

A. :.. inlet #al#e should "e ept shut hile the outlet #al#e should "e left open,

so that heater can "e put into use as fast as possi"le in case reuired

10+. Which of the folloing can lead to sudden stopping of a diesel engine?

4. 4ir in fuel supply line

C. Water in fuel supply line

7. "struction in air !lter

A. Water in the air !lter

108. 4 multistage centrifugal pump is normally used

4. /igh head

C. /igh discharge 6o

7. /igh #iscous 6uids

A. o #iscous 6uid

10. In a three phase electrical euipment, the immediate action in the e#ent of a

fuse "loing in one of the phases, ould "eG

4. 'o replace ith a fuse of correct rating

C. 'o replace fuses on all three phases7. 'o try to repair the fuse

A. 'o in#estigate the fault that led to the "loing of the fuse *>

110. 4 drain cooler is pro#ided ith 9.W. cooling. What is the "est ay to increase

the temperature of condensate draining to the hotell?

4. 'hrottle the 9.W. inlet #al#e


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C. 'hrottle the 9.W. outlet #al#e

7. pen the condensate Cypass to the cooler

A. 7lose the condensate "ypass to the cooler

111. Which of the folloing option gi#es you the correct seuence of the metals in

decreasing order of preferential corrosion hen all of them are "onded and

immersed in an electrolyte ?

4. 'itanium, ;ild 9teel , inc , 9tainless steel

C. 'itanium , 9tainless steel ,;ild 9teel ,inc

7. inc , ;ild 9teel , 9tainless steel , 'itanium

A. inc , 'itanium , ;ild 9teel , 9tainless steelL

112. Auring auxiliary engine de-car"oni%ation, hich of the folloing checs need

to "e carried out?

4. 9ounding of all dou"le "ottom tans

C. 7onnecting rod "ig end o#ality7. iner ear

A. 7rac detection tests on connecting rod serrations

11$.4 reciprocating pump is used for Dngine room "ilge ser#ice "ecauseG

4. Reciprocating pumps are designed for smoother discharge

C. nly small capacity pumping capacity is reuired, hile other pumps are of

higher capacity

7. It doesn???t churn and mix the "ilge ater unlie other types of rotary and

rotodynamicpumps

A. 9hip"uilding industry is still going on old concept, future ships ill ha#e

centrifugal pumps installed

11$.Increasing the rotational speed of a cargo pump the pump 6o rate illG

4. Increase in direct proportion to the increase in speed

C. Aecrease in direct proportion to the increase in speed

7. :lo rate doesn???t depend upon speed

A. :lo

11&.While re-6oating the #essel after dry doc, hich of the folloing checs

should "e carried out?multichoice

4. 9ounding of all dou"le "ottom tans

C. 7hecing leaages in the stern tu"e header tans

7. 7hecing leaages at ship side #al#es

A. 7hecing le#els of stern tu"e header tans

11(. 'he machinery hich is usually tested !rst once the ship reaches a dry doc

is


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4. Dngine room crane

C. Dngine room lift

7. Mantry crane for engine room

A. 4ll of the a"o#e

11).the si%e of solid particle contaminants in hydraulic systems is measured inG

4. ;illimeter cu"ed

C. @ano-millimeter

7. ;icrons

A. ;icro millimeter

11+.In a reciprocating pump the direction of 6o depends uponG

4. Airection of rotation of the pump

C. osition K !xing of suction and discharge #al#es

7. /igh pressure to lo pressureA. Whether pump is single acting or dou"le acting

118.:ire side in "oilers gets commonly corroded due to G

4. Mal#anic action

C. :ormation of Nanadium pentaoxide and sulphuric acid

7. 9tress corrosion

A. 7re#ice corrosion

11.ump dri#en clutch type attached #acuum pumps are commonly used for

priming "allast pumps and emergency !re pumps. What is the factor hich

clutches the #acuum pump clutch to the pump clutch during start of the pump?

4. o suction pressure acting against the spring loaded clutching piston

C. /igh suction pressure acting against the spring loaded clutching piston

7. o discharge pressure acting against the spring loaded clutching piston

A. /igh discharge pressure acting against the spring loaded clutching piston

120.Which of the folloing statements is :alse a"out hydraulic acs>tensioning

tools?

4. 'he piston of the ac should "e turned "ac "y a certain degree after hand

tightening to pre#ent easy remo#al after un tightening of the nut.C. 'he piston of the ac should not "e turned "ac after hand tightening during

un tightening of the nut

7. 'he piston of the ac need not "e turned "ac during tightening of the nut.

A. 'he hydraulic pressure need not "e relie#ed during remo#al of the ac.

121.In a shell and type ;>D .. cooler, the temperature of .. is controlled "y an


18/80

Page 18 of 80

automatic temperature control #al#e. ut at sea ith ;>D running at sea load it is

o"ser#ed that the temperature control #al#e opening to the cooler is increasing

day "y until it "ecomes 100F open to the cooler. 'he .. outlet temperature

BBBBBBBBBBBBBBB after the a"o#e condition has reached

4. 9tarts decreasing immediately

C. 9tarts increasing immediately

7. Will "e maintained at the set point of the temperature controller

A. 7annot "e maintained at the set point and ill increase sloly

122.Which of the folloing is @' a rotary motion #al#e?

4. Mate #al#e

C. Cutter6y Nal#e

7. Call #al#e

A. lug Nal#e

12$.Which of the folloing can lead to short cycling or freuent cutting in and

cutting out of a fridge compressor?

4. Airty condenser

C. 4ir entrapped in refrigerant

7. /igh cooling ater temperature

A. Mrossly insu5cient charge

12&.Auring shutting don the puri!er you !nd that puri!er alays #i"rates

hea#ily for some time and then "ecomes normal until it !nally comes to a stop.

What is rong ith puri!er?

4. 'he puri!er design is faulty

C. 'he puri!er "ol has a hea#y sludge deposit and reuires cleaning

7. 'he puri!er "ol is not "alanced properly

A. Auring shutting don most of the puri!ers pass through the critical speed %one

12(./ot corrosion in exhaust#al#es and !re side of "oiler mainly hen G

4. :uels containing #anadium content ith high sodium content are used

C. :uels containing #anadium content ith lo sodium content are used

7. :uels containing high #anadium and high sulphur content are usedA. :uels containing high sulphur content is used and the exhaust temperatures

are uncontrolled and exceed )00 deg. 7

12).@9/ and the 'otal suction head are to terms hich are commonly used for

pumps. Which of the folloing is a true statement?

4. 'hey are one and the same thing

C. 'otal suction head is greater than @9/


19/80

Page 1 of 80

7. @9/ is alays greater than 'otal suction head

A. 'otal suction head and @9/ ha#e no relationship

12+.Auring 6ooding of a dry doc the folloing items must "e #eri!ed

4. 4ll sea #al#es are operational

C. 4ll o#er"oard discharge #al#es are operational

7. 9tern tu"e seal are operational

A. 4ll of the a"o#e

128.Oou ha#e o#erhauled a centrifugal pump and hile assem"ling forgot to

install the o-ring "eteen the slee#e


20/80

Page 20 of 80

7.9hut all cylinder liner ports of a3ected cylinder

A.pen relief #al#e of a3ected cylinder

1$2.'he coating on a electrode used for electric arc elding BBBBBBBBBBBBBBBBB

4. creates a gas shield to pre#ent oxidation of the eld material

C. helps the eld formation "y shaping the metal transfer

7. pro#ides an electrical insulation for the user

A. 4ll of the a"o#e

1$$.4 di3user is pro#ided at the end of a mechanical atomi%er in "oiler on"oard

4.'o pre#ent "lo "ac of the 6ame

C.'o mix the air and fuel properly

7.'o pre#ent "lo out of the 6ame

A.'o eect the excess fumes from the atomi%er

1$&. Auty of stand "y person at the entrance of the enclosed compartment during

enclosed space entry is

4.'o alert others in case of untoard emergency

C. 'o pro#ide !rst aid to inured person

7.'o assist for the or carried out in the enclosed compartment

A.4ll of the a"o#e.

1$(. Which of the folloing statements a"out the design of A- type "oilers, is

false ?

4.'he hea#ier ater in top drum 6os "ac to the "ottom drum through the

don- comers outside the furnace

C.Inside the furnace the ater is heated up in the risers

7.'he upper drum is the steam>ater drum and the loer one is the ater drum.

A.'he feed ater is pumped into the loer drum


21/80

Page 21 of 80

1$).If the atcheeping engineer encounters a ;ain Dngine 9lo don alarm he

shouldBBBBBBBBBBBBBBBBBBBB

4.Immediately cancel the slo don in the control panel

C.If na#igation circumstances permit, after consulting chief engineer he should

tell "ridge to stop engine ,in#estigate the fault ,rectify it in consultation ith

senior engineers and then prepare for restarting the engine

7./e should raise engineer*s alarm and ait for all engineers to reach the engine

room

A./e need not tae any action and ait for the alarm to resol#e on its on and

then cancel the slo don

1$+.resence of catalytic !nes in fuel oil is signi!cant to engineers on "oard

"ecauseBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBB

4.7atalytic !nes tend to impair proper operation of puri!ers

C.7atalytic !nes lead to a"rasi#e ear in liners , piston rings and fuel inection

euipment

7.7atalytic !nes necessitate increase in inection temperature

A.7atalytic !nes necessitate increase in storage temperature

1$8. 9euential starting of machineries after "lac out in engine room is

necessary

4.'o pre#ent o#erload of Menerators

C. 'o uicly restore the failed poer supply in order

7. 'o pre#ent damage to machinery hich has "een sitched o3

A. 4ll of the a"o#e

1$. ositi#e displacement, helical gear pumps are ell suited for pumping oil

"ecause

4. stu5ng "oxes eliminate the leaage pro"lems usually associated ith other

gear pumps

C.it is not necessary to closely maintain design clearances this pump

7.they are essentially self-priming and produce a high suction lift


22/80

Page 22 of 80

A. these pumps are designed ith extreme tooth angles

1&0. 9alinity of distilled ater produced from fresh ater generator on"oard

depends on

4.4mount of feed set in fresh ater production

C.4mount of salt ater leaing from condenser if any

7.'emperature of the sea ater used

A.D5ciency of "rine eector from the e#aporator shell

1&1.'he "y-products of oxidation, as a result of ater contamination of hydraulic

oil, are generally

4.remo#ed "y cellulose type !lters

C.gums, #arnishes, and acids

7.alays neutrali%ed "y oil additi#es

A.harmless and ha#e no e3ect on system components

1&2.9hort cycling of a fridge compressor can occur in hich of the folloing

cases?

4.4ir ingress into the system

C.4 leaing solenoid #al#e

7./igh cooling ater temperature going to the condenser

A.Dxcessi#e refrigerant charge

1&$.Which of the folloing ould "e the correct ay


23/80

Page 2$ of 80

1&(.7hromium is a no"ler metal hen compared to that of steel . In some marine

applications 7hromium is electroplated to the steel surfaces . Why?

4. 7hromium is a more no"le metal so it ill not get corroded and thus steel

surfaces ill remain protected

C. 7hromium plating pro#ides corrosion protection as ell as high glossiness and

high hardness for "etter ear resistance and reduced friction to the steel

surfaces

7. 7hromium plating is reuired for pro#iding high glossiness and high hardness

for "etter ear resistance and reduced friction to the steel surfaces and not for

corrosion protection

A. 7hromium reacts ith steel to form an alloy during electroplating hich is

corrosion resistant

1&).7orrect method of greasing a centrifugal pump "earing isG

4. 'o pump the grease until you feel high "ac pressure on the Mrease pump

C. 'o pump the greasefor $-& pumping stroes of Mrease pump for each "earing7. 'o pump the grease hen the pump is stopped and drain any old grease at the

same time "y opening the drain plug, gi#ing only $-& pumping stroes on Mrease

pump for each "earing. the drain plug should then "e replaced

A. 'o pump the grease hen the pump is running and drain any old grease at the

same time "y opening the drain plug,until all the old grease is remo#ed and ne

grease starts coming out of the drain, repeating samefor each "earing. the drain

plug should then "e replaced

1&+.7entrifugal pumps cannot handle air and reuire priming.Cut you are aare

that centrifugal hich on the same principal can handle air #ery ell. Which to

properties of air are responsi"le "ecause of hich the centrifugal pumps cannot

handle airG-

4. :luidity only

C. Aensity only

7. Coth 6uidity and density

A. 7ompressi"ility

1&8.;D7/4@I74 9D49 4RD @' E9DA I@....

a.IQIEA I@D

".IQEIA WI'/ N4ER I@D

c.IQEIA WI'/ AIR' [email protected] : '/D 4CND

1&. Which of the folloing #al#es cannot pre#ent "ac6o of liuid in a pipeline?

4. Mate #al#e

C. Mlo"e 7hec Nal#e

7. 9ing 7hec Nal#e


24/80

Page 2& of 80

A. 4ngle chec #al#e

1(0. 4 gear pump is self priming hile a reciprocating pump is not

C. Aischarge of a gear pump is not a3ected "y the direction of rotation hile that

of reciprocating pump is re#ersed

7. 'he discharge of reciprocating pump is pulsating and discharge rate is lesserA. Reciprocating pumps are only a#aila"le in high capacities and for smaller

capacities only gear pumps can "e used

1(1.4fter cleaning the sea chest !lter you ha#e placed the !lter in the "ody and

tightened the co#er. Which one of the folloing is the "est alternati#e?

4. Oou can open the !lter inlet and outlet #al#es K directly start using the !lter

C. If you do not ant to use the sea chest in uestion, you need not orry and

you can open the #al#es hen reuired

7. 9ea Water inlet #al#e should "e crac opened, the !lter "ody should "e purged,

any leaages and thereafter !lter can "e ept isolated or used as reuiredA. Oou ill close the other side sea chest #al#es !rst and then open this side sea

chest !lter inlet and outlet #al#es

1(2.centrifugal pump ill typically gi#e you a lo 6o rate at a loer pressure,

here a piston pump ill gi#e you more pressure and higher 6o rate. Is the

statement correct?

4.'RED

C.:49D

7. :irst 9entence is right. 9econd one is rong

A. I Aon*t no

1($. Refer cooling tu"es act as self-cooling K expansion "y

a= 9traight tu"e

"= E tu"e

c= 9pring tu"e

d= none of the a"o#e

1(&.'N ----threshold limit #alue

1((. /o many non return #al#es in I.M.?

a. 'o

". 'hree

c. If et seal type then one else to

d. @one of a"o#e

1(). Where "oiler point temp high......options are

a= riser

"=superheater


25/80

Page 2( of 80

c=primary steam drum

d=secondary steam drum

1(+.Which of the folloing statements is true?

4. 'he rotary #ane type steering gear generally operates at higher oilpressures than the ram type .

C. 'he ram type steering gear generally operates at higher oil pressures than

the rotary #ane type .

7. Coth ram type and rotary #ane type steering gears generally operate at

similar oil pressures


1(8. ;arine "oilers "urning /.:.. face a pro"lem of cold corrosion due to high

sulphur content. 'he minimum 6ue gas temperature ithin any "oiler part is ept

a"o#e due point of /29&. 'he actual de point of /29& in 6ue gases depends

on the G

4. Coiler furnace temperature

C. 4m"ient air temperature

7. Coiler operating pressure

A. /: sulphur content and moisture in com"ustion air

1(./o is the concentration of dissol#ed oxygen in the feedater of an auxiliary

"oiler maintained at accepta"le limits?

4. :eedater is cycled through a A7 heater.

C. :eedater is treated ith phosphates.

7. xygen is li"erated in the three-stages of feedater preheating.

A. xygen is li"erated "y maintaining the highest practical feedater

temperature

1)0.rior to lighting o3 a cold automatically !red auxiliary "oiler, you should

4. chec and regulate the ater le#el


26/80

Page 2) of 80

C. close the air coc once !res are lit

7. "lodon the gage glass

A. crac the steam stop to assure protecti#e steam 6o

1)1.9team temperature control for the D9A-II "oiler is achie#ed "y G

4. :itting a de-superheater "eteen 1st K 2nd passes of superheater

C. :itting an attemperator "eteen 1st K 2nd passes of superheater

7. Mas dampers in "oiler uptae

A. Cypassing the superheater

1)2.If the com"ustion control system of an automatically !red auxiliary "oiler

fails to sustain "urner ignition after a normal shutdon, you should chec for

a>an

4. faulty photocell detector

C. lo steam pressure

7. high #oltage on the ignition electrode

A. open air damper

1)$. Which of the folloing conditions is responsi"le for the fuel oil to atomi%e

hen using a steam atomi%er in auxiliary "oiler?

4. Dxpansion of the steam in the furnace.

C. Dxpansion of the steam in the hirling cham"er.

7. Dxpansion of the steam in the ori!ce plate.

A. 4ll of the a"o#e.

1)&.It is a non fact that centrifugal pumps reuire priming for pumping

liuids , as they cannot handle air and ill lose suction due to air entry . Cut

on the other hand '>7s use centrifugal compressors for supercharging . Which

of the folloing do you thin maes a centrifugal compressors to pump air

and "eha#e di3erently than the centrifugal pumps?

4. resence of air coolerC. resence of a"yrinth seal

7. /igh speed of rotation , #ery !ne internal clearences and large impeller

diameters


1)(.If an operating auxiliary "oiler has a ater p/ reading of +, you should

4. "ottom "lo the "oiler

C. treat the ater ith caustic soda


27/80

Page 2+ of 80

7. treat the ater ith chemical sca#engers

A. reduce the ater alalinity to recommended readings

1)).If the "oiler tu"es are scaled on the ater side then G-

4. /eat conduction through the tu"es ill "e #ery high leading to rapid

e#aporation

C. 'he "oiler furnace can get damaged due to excessi#e temperatures

7. 'he surface of the tu"e ill "e o#erheated as heat transfer is impaired

A. 'he natural circulation of ater ithin the "oiler ill "e more e5cient

1)+. 4ny steering gear system alarm can only "e successfully acnoledged

from BBBBBBBBBBBBBBBBBBBB

4. 'he "ridge

C. 'he engine control room

7. 'he steering compartment

A. 'he ship*s o5ce

1)8.. 'o chec the setting of the o#erspeed trip on a diesel poeredgenerator, you ould use a

4. tachometer

C. torsion meter

7. dynamometer

A. pony "rae

1).in a coil type auxiliary ater tu"e circulation "oiler

1=une#aporated feed ater collects in the "ottom of the 6ash cham"er

2=all generated steam is re-circulated through heating coils in the "oiler

$= heated ater 6ashes to steam in the "oiler heating coils

&= response to steam demand is sloer than in a !re tu"e "oiler'op of :orm

1+0. hen "oth the steering motors r in use??

1= 12 nautical miles near port

2= pilot on-"oard

$= na#igational pr"lm

&= all f da a"o#e

1+1.What ould "e the indications and the e3ects of a compressor running

under the folloing conditions


28/80

Page 28 of 80


29/80

Page 2 of 80

C. arn the engineer of lo ater le#el

7. cool the cron sheet at high !ring rates

A. open the "urners* electrical !ring circuits

180.4 closed freshater cooling system is commonly used ith marine diesel

engines "ecause the

a=need for ater treatment is eliminated

"=cooling ater temperature di3erential is greater

c=cooling ater pumps are directly re#ersi"le

d=acet ater temperature is more easily controlled

181."urner com"ustion control is control hat???

4. steam 6o

C. steam pr

7. "oth

A. none

182.Dngaging the turning gear and turning the engine until oring

temperatures are reduced

4. Clan starting air to the a3ected cylinder

C. 9hut cylinder oil to the a3ected cylinder

7. 9hut all cylinder liner ports of a3ected cylinder

A. pen relief #al#e of a3ected cylinder

18$.Water carryo#er from "oiler on"oard through the steam causes

4. Drosion of the steam plant machinery

C. o ater le#el inside the "oiler

7. Cuild-up of deposits on the steam plant machinery

A. @one of the a"o#e18&.rior to maor o#erhaul of main engine on"oard, the engine room crane is

tested "y

4. perating the crane through the normal range

C. 'esting of the crane ith to sample ???a"normal??? conditions

7. Inspection of the crane hoo and other safety arrangements

A. 9tress testing of crane ire ith pea loads

18(.'he purpose of an air cooler in a supercharging system is to G

4. Reduce temperature of supercharged air in order to condense and remo#e

maximum possi"le moisture from the air prior entry to the engine

C. Reduce the temperature of the supercharged air in order to increase the

density K also to cool don "elo de point to remo#e moisture from air prior


30/80

Page $0 of 80

entry to the engine

7. 7ool supercharged air to increase its density such that the de point is not

reached to a#oid entry of moisture into the engine

A. 7ool supercharged air to increase it???s density and also to eep the pea

temperature and exhaust gas temperature ithin limits

MD@DR4 S4@-201$

18).Which is the only gas product ,alloed "y gas codes, to "e

"urnt in ship*s "oilers?

4. M

C. Dthylene

7. Cutane

A. @M

18+.Water hammer in a steam heating system can "e caused "y

4. !lling the auxiliary "oiler ith cold ater

C. steam admitted to a cold pipe

7. !lling the auxiliary "oiler ith hot ater

A. draining a soot "loer line "efore cracing the steam supply #al#e

H188.4 partial opening of hich of the folloing inds of #al#es

can lead to ire -draing of its seat?

4. Mlo"e Nal#e

C. Cutter6y #al#e7. Mate Nal#e

A. :ull "ore angle #al#e

H188.Which of the folloing types of coatings used in tans of a

chemical carrier pro#ides a comprehensi#e protection against

most sol#ents?

4. Dpoxy coatings

C. olyurethane coatings

7. inc silicate

A. henolic resins

18.Ae%inci!cation of "rasses may "e pre#ented "y introducing

hich of the folloing additi#es during manufacturing "rass?

4. 0.0&F @icel

C. 0.0&F 7o"alt

7. 0.0&F4rsenic

A. 0.0&F'ungsten


31/80

Page $1 of 80

10.Which of the folloing statements is false a"out corrosion due to Mal#anic

action?

4. ;etals close to the anodic end of gal#anic series corrode in preference to

the ones close to the cathodic end.

C. When any single metal exists in a system, it cannot corrode due to Mal#anic

action.

7. inc is anodic to steel and is often used as a protecti#e coating

A. 7orrosion rate is a3ected "y temperature

11.Which of the folloing types of steam traps uses the

pressure energy of the steam to close the outlet ?

4. 'hermostatic trap

C. 'hermodynamic trap

7. ;echanical trap

A. Nacuum trap

12.9team stop #al#e is eased of its seat during "oiler start up

from cold

4. 'o allo thermal expansion of parts

C. 'o allo steam 6o during start up

7. 'o pre#ent ater hammer

A. 4ll of the a"o#e

H1$.'he master or person in charge of a ;AE is reuired to log

4. the date and hour of each !re drill

C. the names of all persons on "oard

7. only casualties hich occur hile underayA. e#ery e#ent occurring on "oard

H 1&.ld machinery space log "oo are ept in safe custody

4. 'o refer and clarify in case of any uery

C. :or purpose of internal and external audits

7. 'o safeguard the chief engineer???s competence

A. @one of the 4"o#e

1(.ne cause of leay #al#es in a lo pressure air compressor may "eattri"uted to

4. running ith an air !lter element di3erent from that reuired "y the

original manufacturer*s speci!cations

C. excessi#e operating hours ithout carrying out pre#enti#e maintenance

7. the compressor running too fast

A. excessi#e discharge pressure


32/80

Page $2 of 80

1).Cefore the longitudinal carriage feed of a lathe is

engaged, you must "e certain the

4. spindle clutch is disengaged

C. carriage clamp scre is loosened

7. carriage stop clamp is tightened

A. thread dial indicator is %eroed

H1+.4 record of the types and strengths of steels used on a

;AE must "e included in the

4. Meneral plans

C. Cuilder*s documentation

7. 7erti!cate of Inspection

A. 7onstruction portfolio

18.;oisture in a refrigerant system ill cause

4. :aulty expansion #al#e

C. /igh suction temperature

7. /igh suction pressure

A. o discharge temperature

H1.'he term referring to the num"er of teeth per inch on a

hacsa "lade is non as the

4. 9et

C. rae

7. pitch

A. thread gauge

200.If the superheat #alue of a thermostatic expansion #al#e isset too loBBBBBBBB

4. 'he suction line of the compressor ill "e too hot

C. 'he suction line of the compressor ill "e too cold

7. 'he discharge line of the compressor ill "e too hot

A. 'he discharge line of the compressor ill "e too cold

H201.D5cient soot "loing of exhaust gas economi%ers and

"oilers is essentialBBBBBBBBBBBBB

4. 'o minimi%e chances of soot !re

C. 'o increase e5ciency

7. 'o minimi%e chances of hea#y corrosion and locali%ed

heating leading to tu"e failure

A. 4ll of the a"o#e

H202.referential tripping of electrical machineries pre#ents

4. #erloading of generators

C. Clac out in engine room

7. 4llos starting of large machineries


33/80

Page $$ of 80


H20$.4 simultaneous rise in stern tu"e forard seal tan and drop

in le#el of header tan indicatesBBBBBBBBBBBBBBBBB

4. 4ft seal ring of forard seal assem"ly damaged or

sealing distur"ed "y foreign o"ectC. :orard seal ring of forard seal assem"ly damaged or

sealing distur"ed "y foreign o"ect.

7. Dither of the a"o#e


20&.Which of the listed conditions can lead to ca#itation in a

centrifugal pump?

4. Napor pocets formed in the suction 6o stream

C. Rough casing #olute surfaces

7. Worn earing ringsA. /ea#y 6uid in the 6o stream

H 21(.'he coating on a electrode used for electric arc elding

BBBBBBBBBBBBBBBBB

4. creates a gas shield to pre#ent oxidation of the eld

material

C. helps the eld formation "y shaping the metal transfer

7. pro#ides an electrical insulation for the user

A. 4ll of the a"o#e

20)./igh pressure cut out of a refrigerant system can acti#atedue to hich of the folloing faults?

4. Improper cooling due to a dirty condenser

C. #ercharge

7. 4ir in the system

A. 4ll of the a"o#e

20+.'he static suction lift of a pump is the di3erence in

ele#ation "eteen the

4. centerline of the pump and the le#el of the liuid in the suction ell hen

the source of liuid is "elo the pump

C. centerline of the pump and the suction liuid le#el hen the source ofliuid is a"o#e the pump

7. centerline of the pump and the le#el of the discharge liuid

A. liuid le#els of the suction and discharge

H208.iping is si%ed "y its nominal

4. inside diameter regardless of other parameters

C. outside diameter regardless of other parameters


34/80

Page $& of 80

7. inside diameter from 1>8 inch to 12 inches, and o#er 12

inches "y its outside diameter

A. inside diameter from 1>8 inch to 2& inches, and o#er 2&

inches "y its outside diameter

20.'he primary ad#antage of a central cooling systemisBBBBBBBBBBBBBBBBBBBBBB

4. 4 more simpli!ed cooling circuit.

C. ;ost part of the cooling system "eing fresh ater "ased, corrosion is

minimi%ed

7. It allos "etter control of temperatures "y using feer controllers

A. 4ll of the a"o#e

210.Auring maor repair or in enclosed space on"oard

4. Teep log of entry and exit time of personnel

C. Teep adeuate !rst aid euipment at the entrance7. ro#ide refreshments


211.4 high pressure di3erential in a main engine fuel oil

!lter on"oard can "e "est reduced "y

4. Cac 6ushing the !lter manually

C. 9topping the main engine to change the !lter element

7. 7hanging o#er to stand "y !lter if pro#ided


212.4 maor controlling factor in the location of the condensatereturn piping from a heating system is>are

4. the reuirement for a gra#ity return

C. the reuirement for short laterals run

7. the reuirement to minimi%e con6ict ith headroom and

other ser#ices

A. all of the a"o#e

21$.Which of the folloing is the material used for

manufacturing tu"e plates of a shell and tu"e type heat

exchanger?

4. 7upro-nicel

C. 4luminum Crass

7. 4dmiralty Crass

A. Munmetal

H21&.late type heat exchangers are preferred o#er shell and tu"e

type ones "ecauseBBBBBBBBBBBB


35/80

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4. 'hey can "e cleaned more thoroughly .

C. 'heir capacity can "e altered "y adding or remo#ing plates.

7. 'ur"ulent 6o and more margin for increased 6uid

#elocity ensures less deposits and hence longer time inter#al "eteen

cleanings.

A. 4ll of the a"o#e

21(.Inert Mas 9ystem should "e capa"le of deli#ering Inert Mas

at the rate of at leastBBBBBBBBBBBBBBBBBBBBBBBBBBBB

4. 110F of the maximum rate of cargo discharge capacity of

the ship

C. 1$$.$$F of the maximum rate of cargo discharge capacity

of the ship

7. 12(F of the maximum rate of cargo discharge capacity of

the ship

A. 0F of the maximum rate of cargo discharge capacity of

the ship

H21).Which of the folloing is an example of non-destructi#e

test?

4. 7reep test

C. Impact test

7. /ardness test

A. Eltrasonic testing

21+.Which of the folloing factors ill ha#e the greatest e3ect

on the heating load ithin a conditioned space?

4. 9olar gainC. In!ltration and #entilation air

7. ccupants inside the space

A. Dntertainment euipment ithin the space

218.:reuent cutting- in K cutting -out of a fresh ater pump on

a hydrophore system indicates hich of the folloing?

4. @othing a"normal

C. Dxcessi#e air charge

7. Insu5cient air charge

A. 'he di3erential setting "eteen cut-in and cut out is

too lo

H21.o#erall length of pairs of rams is reduced in hich of the

folloing tiller designs of a steering gear arrangement?

4. :ored tiller design

C. Round arm tiller design

7. 7on#entional tiller design


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220./igh pressure cut out of a refrigerant system can acti#ate

due to hich of the folloing faults?

4. Improper cooling due to a dirty condenser

C. #ercharge7. 4ir in the system

A. 4ll of the a"o#e

H221.folloing items must "e #eri!ed prior to using the ily

ater separator on"oard

4. 1(ppm alarm and auto shutdon of "ilge pump

C. il and ater interface le#el

7. osition of the #essel

A. 4ll of the a"o#e

222.Refractory damage in "oiler furnace on"oard is caused due to

4. resence of moisture in the "oiler "efore startup

C. Rapidly 6uctuating temperatures inside "oiler furnace

7. #erheating of "oiler tu"es due to lac of heat transfer

from tu"es due to scale

A. Coiler panting and #i"rations

H22$.'he purpose of an e#aporator in the domestic refrigeration

system is to

4. 'ransmit latent heat of e#aporationC. 4"sor" latent heat of fusion

7. 4"sor" latent heat of e#aporation

A. 'ransmit latent heat of fusion

22&.In case of failure of the control system of a centrifuge,the

correct seuence for manually desludging a puri!er ould "e-

4. 9top feed-gi#e sealing ater-close sealing ater -shut

operating ater-open and close desludging ater uicly

C. 9top feed- shut operating ater-open and close

desludging ater uicly

7. 9hut operating ater-stop feed- open sealing ater for a

short time then close-open and close desludging ater

uicly

A. 9hut operating ater- stop feed- open and close

desludging ater uicly


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22(.rior to man entry into an empty cargo tan of an @M

carrier, hat should "e the !rst operational procedure

adopted?

4. urging

C. 4erating

7. Inerting

A. Warming

H22).rior to maor o#erhaul of main engine on"oard, the engine

room crane is tested "y

4. perating the crane through the normal range

C. 'esting of the crane ith to sample ???a"normal???

conditions

7. Inspection of the crane hoo and other safety

arrangements

A. 9tress testing of crane ire ith pea loads

H22+.9cale formation in a fresh ater generator e#aporator can

lead to BBBBBBBBBBBBBBBBBBBB

4. Impaired heat transfer

C. Reduced capacity

7. Increased shell temperature

A. 4ll of the a"o#e

H228.9alinity of distilled ater produced from fresh ater

generator on"oard depends on

4. 4mount of feed set in fresh ater productionC. 4mount of salt ater leaing from condenser if any

7. 'emperature of the sea ater used

A. D5ciency of "rine eector from the e#aporator shell

22.ipe threads are cut ith a taper to

4. pre#ent o#ertightening the oint

C. pro#ide a leaproof !t

7. permit easy oint disassem"ly

A. produce a !ne e#en thread

2$0.'he ash content of a fuel oil is signi!cant to the

operating engineer "ecause it

4. is an indication of the amount of noncom"usti"le

material present in the oil

C. indicates the uantity of energy released "y "urning a


38/80

Page $8 of 80

unit amount of the fuel

7. is useful for determining proper atomi%ation

temperatures

A. re6ects the o#erall thermal e5ciency of the fuel oil

ser#ice system

2$1.'o compressors should not "e run in parallel "ecause4.It is not e5cient to run to compressors

C.It ill gi#e o#er capacity in the system

7.'here is possi"ility of losing oil from the compressors

A.4 and C

2$2.iuid ring primer used for priming main and emergency !re pumps

on"oard

4.Is to "e !lled ith ater in the ater tan to maintain ater le#elC.Is to "e capa"le of automatic engagement and disengagement ith dri#e

shaft

7.Is to ha#e su5cient capacity to exhaust air out from pump in all sea

conditions

A.4ll of the a"o#e.

2$$.Dnlarging one tu"e end so the end of another tu"e of the same si%e ill !t

inside is termed

4.Celling

C.9tretching

7.:laring

A.9aging

2$&.'o pre#ent electric shoc during electric arc elding

4.Wear dry clothes

C.Wear insulated shoes

7.Teep !rst aid euipment ready

A.@one of the a"o#e

2$(.Cac pressure #al#e in a refrigeration system ith multiple cham"ers is

!ttedBBBBBBBBBBBBB

4.4t the refrigerant exit end of e#aporator of each cham"er

C.4t the refrigerant exit end of e#aporators of cham"ers ith higher


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temperature settings

7.4t the refrigerant exit end of e#aporators of cham"ers ith loer

temperature settings

A.@one of the a"o#e

2$).Inert Mas 9ystem on "oard taners is used during hich of the folloingoperations-

4.Inerting of empty tans

C.Inerting during crude oil ashing

7.urging "efore gas freeing

A.4ll of the a"o#e

2$+.In case of failure of control air supply ,some #al#es continue loced in the

position they ere at the time of failure.

'hey are said to "e-

4.:ail-safe

C.:ail Uproof

7.:ail-set

A.:ail -"loced

2$8.Which of the folloing statements is false a"out corrosion due to Mal#anicaction?

4.;etals close to the anodic end of gal#anic series corrode in preference to

the ones close to the cathodic end.

C.When any single metal exists in a system ,it can not corrode due to Mal#anic

action.

7.inc is anodic to steel and is often used as a protecti#e coating

A.7orrosion rate is a3ected "y temperature

2$.rinciple of !re !ghting on"oard is

4.Watering of !re

C.9tar#ing of !re

7.7ooling of !re

A.9mothering of !re


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2&0. Water carryo#er from "oiler on"oard through the steam causes

4.Drosion of the steam plant machinery

C.o ater le#el inside the "oiler

7.Cuild-up of deposits on the steam plant machinery

A.@one of the a"o#e

2&1./o is the ater circulated "eteen ater and steam drums in a ater

tu"e A- type "oiler?

4.Cy the "oiler feed ater pump

C.Cy a circulating pump outside the "oiler

7.Aue to di3erence in densities of ater and steam

A.@one of the a"o#e

2&2.Water leaing from a pump pacing gland is ept aay from the "earing

housing "y the use of

4.shaft slee#es

C.lantern rings

7.ater 6ingers

A.ater seals

2&$.4n inadeuate reciprocating "ilge pump discharge is most often caused

"y

4.defecti#e intae #al#es

C.clogged suction strainers

7.scarred cylinder alls

A.clogged drain #al#es

2&&.Which com"ination of the main shaft segments listed "elo, that are

located furthest from the main engine, are connected "y the in"oard stern

tu"e shaft coupling?

4.ine shaft and thrust shaft

C.ine shaft and stern-tu"e shaft ....


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Page &1 of 80

7.'hrust shaft and stern-tu"e shaft

A.9tern-tu"e shaft and tail shaft

2&(.'he static suction lift of a pump is the di3erence in ele#ation "eteen the

4.centerline of the pump and the le#el of the liuid in the suction ell hen

the source of liuid is "elo the pump ....C.centerline of the pump and the suction liuid le#el hen the source of liuid

is a"o#e the pump

7.centerline of the pump and the le#el of the discharge liuid

A.liuid le#els of the suction and discharge

2&). 'o pre#ent main engine stoppage during periods of "ad eather

4. Dnsure lu"e oil le#el is topped up

C. Dnsure o#er speed trip o#erride sitch set up to rough sea setting

7. Dnsure reduced speed setting to pre#ent o#erload

A. 4ll of the a"o#e

2&+.4mount of distilled ater produced in fresh ater generator on"oard

decreases ith

4.Increase in #acuum in the fresh ater generator shell

C.Aecrease in sea ater temperature

7.Aecrease in e5ciency of heat exchanger

A.Increase in sea ater temperature

2&8.In case of an exhaust gas "oiler !re , hich of the folloing is a suita"le

control measure?

4. 9tart freuent soot "loingC. Increase main engine speed to "lo aay the soot particles on !re

7. 9top cooling ater circulation to a#oid leaage


2&.Refractory damage in "oiler furnace on"oard is caused due to



7. #erheating of "oiler tu"es due to lac of heat transfer from tu"es due to

scale


2(0.4n economi%er uptae !re in the engine room is extinguished "y

4. Coundary cooling of the uptae

C. Inecting !xed !re !ghting system if pro#ided

7. Inecting ater from the uptae



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Page &2 of 80

2(1. here "oiler point temp high......options are

a= riser

"=super heater

c=primary steam drum

d=secondary steam drum

2(2.Which of the folloing statements is true?

4. 'he rotary #ane type steering gear generally operates at higher oil

pressures than the ram type .

C. 'he ram type steering gear generally operates at higher oil pressures than

the rotary #ane type .

7. Coth ram type and rotary #ane type steering gears generally operate at

similar oil pressures


2($.;arine "oilers "urning /.:.. face a pro"lem of cold corrosion due to high

sulphur content. 'he minimum 6ue gas temperature ithin any "oiler part is

ept a"o#e due point of /29&. 'he actual de point of /29& in 6ue gasesdepends on the G

4. Coiler furnace temperature

C. 4m"ient air temperature

7. Coiler operating pressure

A./: sulphur content and moisture in com"ustion air

2(&./o is the concentration of dissol#ed oxygen in the feed ater of an

auxiliary "oiler maintained at accepta"le limits?

4. :eed ater is cycled through a A7 heater.

C. :eed ater is treated ith phosphates.

7. xygen is li"erated in the three-stages of feed ater preheating.

A. xygen is li"erated "y maintaining the highest practical feed ater

temperature

2((.rior to lighting o3 a cold automatically !red auxiliary "oiler, you should

4. chec and regulate the ater le#el

C. close the air coc once !res are lit

7 ."lo don the gage glass

A. crac the steam stop to assure protecti#e steam 6o

2().9team temperature control for the D9A-II "oiler is achie#ed "y G

4. :itting a de-superheater "eteen 1st K 2nd passes of superheater

C. :itting an attemperator "eteen 1st K 2nd passes of superheater7. Mas dampers in "oiler uptae

A. Cypassing the superheater

2(+.If the com"ustion control system of an automatically !red auxiliary "oiler

fails to sustain "urner ignition after a normal shutdon, you should chec for

a>an

4.faulty photocell detector


43/80

Page &$ of 80

C.lo steam pressure

7.high #oltage on the ignition electrode

A.open air damper

2(8.Which of the folloing conditions is responsi"le for the fuel oil to atomi%e

hen using a steam atomi%er in an auxiliary "oiler?

4. Dxpansion of the steam in the furnace.

C. Dxpansion of the steam in the hirling cham"er.

7. Dxpansion of the steam in the ori!ce plate.

A. 4ll of the a"o#e.

2(. It is a non fact that centrifugal pumps reuire priming for pumping

liuids , as they cannot handle air and ill lose suction due to air entry . Cut

on the other hand '>7s use centrifugal compressors for supercharging. Which

of the folloing do you thin maes a centrifugal compressor to pump air and

"eha#e di3erently than the centrifugal pumps?

4. resence of air cooler

C. resence of a"yrinth seal7. /igh speed of rotation , #ery !ne internal clearancesV and large impeller

diameters


2)0.Cetter freeing arrangements on taner decs inform of open rails for (0F

of length are pro#idedG

4. 'o ensure no seaater gets into the tans.

C. Cecause taners ha#e less free"oard.

7. Coth 4 and C


2)1."urner com"ustion control is control hat???

A. steam ow

B. steam pr

C. both

D. none

2)2.'he purpose of an air cooler in a supercharging system is to G

4. Reduce temperature of supercharged air in order to condense and remo#e

maximum possi"le moisture from the air prior entry to the engine

C. Reduce the temperature of the supercharged air in order to increase thedensity K also to cool don "elo de point to remo#e moisture from air prior

entry to the engine

7. 7ool supercharged air to increase its density such that the de point is not

reached to a#oid entry of moisture into the engine

A. 7ool supercharged air to increase it???s density and also to eep the pea

temperature and exhaust gas temperature ithin limits


44/80

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2)$.Refractory damage in "oiler furnace on"oard is caused due to



7. #erheating of "oiler tu"es due to lac of heat transfer from tu"es due to scale


2)&.


45/80

Page &( of 80


2+0.late type heat exchangers are preferred o#er shell and tu"e type ones

"ecause BBBBBBBBBBBB

4. 'hey can "e cleaned more thoroughly .

C. 'heir capacity can "e altered "y adding or remo#ing plates.

7. 'ur"ulent 6o and more margin for increased 6uid #elocity ensures less

deposits and hence longer time inter#al "eteen cleanings.

A. 4ll of the a"o#e

2+1.9cale formation in a fresh ater generator e#aporator can lead to

BBBBBBBBBBBBBBBBBBBB

4. Impaired heat transfer

C. Reduced capacity

7. Increased shell temperature

A. 4ll of the a"o#e

2+2.;7Q -'o pre#ent electric shoc during electric arc elding

4.Wear dry clothes

C.Wear insulated shoes

7.Teep !rst aid euipment ready

A.@one of the a"o#e

2+$.In case of failure of control air supply ,some #al#es continue loced in the

position they ere at the time of failure.

'hey are said to "e-

4.:ail-safe

C.:ail Uproof7.:ail-set

A.:ail -"loced

2+&.'he static suction head of a pump is the

4.distance of the suction liuid le#el a"o#e the center line of the pump

C.distance the suction liuid le#el is "elo the center line of the pump


46/80

Page &) of 80

decreases ith

4.Increase in #acuum in the fresh ater generator shell

C.Aecrease in sea ater temperature

7.Aecrease in e5ciency of heat exchanger

A.Increase in sea ater temperature

2++.4uto Tlean !lter are cleaned "y

a. 7ompressed air

". 'urning the spindle

c. Cac6ushing

d. 4ll of the a"o#e

2+8.@o of pistons in axial piston pump


47/80

Page &+ of 80

A. e#ery e#ent occurring on "oard

28(.ne cause of leay #al#es in a lo pressure air compressor

may "e attri"uted to

4. running ith an air !lter element di3erent from that

reuired "y the original manufacturer*s speci!cationsC. excessi#e operating hours ithout carrying out

pre#enti#e maintenance

7. the compressor running too fast

A. excessi#e discharge pressure

28).rior to man entry into an empty cargo tan of an @Mcarrier, hat should "e the !rst operational procedureadopted?4. urgingC. 4erating

7. InertingA. Warming

28+. Which of the folloing statements a"out the design of A- type "oilers, isfalse ?

4.

'he hea#ier ater in top drum 6os "ac to the "ottom drum through thedon- comers outside the furnace

C. Inside the furnace the ater is heated up in the risers

7. 'he upper drum is the steam>ater drum and the loer one is the ater drum.

A.'he feed ater is pumped into the loer drum


48/80

Page &8 of 80

288.ositi#e displacement, helical gear pumps are ell suited for pumping oil"ecause

4.

stu5ng "oxes eliminate the leaage pro"lems usually associated ithother gear pumps

C. it is not necessary to closely maintain design clearances this pump

7. they are essentially self-priming and produce a high suction lift

A. these pumps are designed ith extreme tooth angles

28. When there is excessi#e ingress of ater in the engine room on"oardcausing dangerous le#els of "ilge ater,

4. 9tart oily ater separator and pump o#er"oard

C. 9tart Meneral ser#ice pump and pump "ilges o#er"oard

7. Ese "ilge inection #al#e and pump "ilges o#er"oard



49/80

Page & of 80

.20..cran e" de6ection readings ill gi#e a positi#e indication of-orn main "earing ournals-torsional stress deformation-slac thrust "earings-"earing shells shim dimensions

21. 'he replacement piping for diesel engine high pressure fuel systemsmust "e the same length and diameter as the original piping to-a#oid unnecessary parts in#entory-eep torsional #i"ration constant-use existing supports and "races-maintain speci!ed inection characteristics

22. Which of the listed types of gaset material should "e used on highpressure fuel oil lines on a diesel engine?-:i"erglass-9heet as"estos-@eoprene-9oft copper

2$. 4 main propulsion diesel engine cranshaft "earing lacing su5cientcrush, ill-pound under load-"e lu"ricated more easily than ith su5cient crush-tend to rotate ith the ournal-ha#e its "ac forced against the seat under load

2&. If the cooling ater temperature and the lu"e oil temperature in adiesel engine are too high, the cause can "e-a dirty lu"e oil strainer-internal ater leas-an oil suction line restriction-excessi#e ear of the cooling ater pump

2(. While inspecting the main "earings on a diesel engine you !ndimpregnated dirt and scratches in the "earing surface. Oou ould,


50/80

Page (0 of 80

therefore, suspect that-the "earing had "een o#erheated-ater as present in the oil-the lu"e oil as not "eing properly !ltered-the maximum alloa"le "earing pressure had "een exceeded

2). 'he "est method for determining the amount of eccentricity oro3set misalignment "eteen the disconnected propeller shaft coupling6ange and the engine cranshaft 6ange is "y using a-strait edge laid across the 6ange edges-thicness gauge "eteen the separated 6ange faces-"ridge gauge to chec the position of each 6ange in relation to the other-dial indicator mounted on one 6ange indicating any misalignment of theother 6ange

2+. itting in the area close to the pitch line and on the same end ofeach gear tooth of a reduction gear unit ould "e caused "y-corrosion on the gears-excessi#e gear speed-dirt in the oil-misalignment of the gears

28. If the coolant temperature is excessi#ely lo as it passes throughthe internally cooled fuel inectors, the inectors may"e damaged "y-ater condensation in the fuel-corrosion of the no%%le tip-car"on deposits on the leao3 inlet-o#er lu"rication of the needle #al#e

2. 4dustements to the compensating needle #al#e in a hydraulic go#ernorshould "e made ith the engine at-maximum poer at a normal load-maximum poer and load under normal conditions-half speed and normal temperature-normal operating temperature ithout a load

$00. 4 craced cylinder head on a diesel engine may "e indicated "y-excessi#e lu"e oil consumption-ater draining from the fuel lea o3 #al#es-com"ustion gases #enting at the expansion tan-excessi#e fuel oil consumption

$01. 'he principal ha%ard to personnel hen a diesel no%%le tester is inuse is-electrical shoc-toxic fumes

-explosion-"lood poisoning

$02. 4 possi"le cause for an indi#idual piston to noc hen at 'A7 on aslo speed, to-stroe>cycle main propulsion diesel engine could "e due to-early fuel inection-excessi#e "earing play ithin the running gear-o#erloading of the cylinder-all of the a"o#e


51/80

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$0$. Which of the listed cylinder liner surface conditions indicatesproper lu"rication?-dull "lac appearance-"right appearance-thin layer of lacuer

-thic oily !lm

$0&. Cecause of the tolerances used in diesel engine fuel oil pumps,a orn plunger reuires-grinding the spare plunger to the "arrel-replacing the plunger and the "arrel-highly polishing "oth the plunger and "arrel-replacing plunger only

$0(. While o#erhauling a er-type fuel pump it is necessary to replacethe pump plunger. Which of the parts listed "elo must also "e replaces?-Aeli#ery chec #al#e-ump "arrel-'u"ing to the inector-7am folloer

$0). If the plunger or "arrel of a fuel inection er pump "ecomes damaged,-the entire pump must "e replaced-the inection pump and inection no%%le must "e replaced-either the "arrel or plunger must "e replaced-the "arrel and plunger must "e replaced as a unit

$0+. 4 ell lu"ricated "earing surface alays appears-ell nurled-slightly streaed-lightly gla%ed-highly polished

$08. When disassem"ling and assem"ling an inection pump plunger and "arrelyou should-eep the parts immersed in diesel fuel oil-alays eep the plunger and "arrel together-or o#er a linoleum-type surface-all of the a"o#e

$0. Ene#en "olt tightening during the installation of a fuel inectionpump can result in-"inding of pump mo#ing parts-ignition delay-high tortional shoc to the fuel lines

-improper pump-to-engine timing

$10. Which of the listed de#ices could "e used as a su"stitute for a ringgroo#e tool?-steel "rush-!ne emery cloth or steel ool-a section of the remo#ed compression ring-a case hardened scraper


52/80

Page (2 of 80

$11. ;isalignment of the dri#e shaft and propeller shaft 6anges can "edetected "y using a dial indicator or-inside micrometer-feeler guage and straight edge-adusta"le trammel-sighting de#ice

$12. 4 method of !nishing diesel engine cylinder alls to aid in theproper ring seating and lu"rication is non as-ri""ed honing-angled honing-cross hatch honing-dou"led honing

$1$. 4fter a long period of operation, a ear ridge, caused "y piston ringaction, ill de#elop near the top of the cylinder liner. 'his ridge must "eremo#ed hen piston rings are reneed in order to pre#ent-excessi#e ear during the seating period-excessi#e lu"rication of the top ring-improper spreading of lu"rication on the cylinder all-"reaing of the top ring, ring land, or "oth

$1&. 4 properly honed diesel engine cylinder liner ill-pre#ent piston ring ear-shorten the ring "rea-in period-pre#ent cylinder liner gla%ing-appear slic and gla%e

$1(. It is easier to replace a dry cylinder liner than a et one "ecause-of the thin all thicness-honing maes it easier to maintain the desired oil !lm-ater seals are not reuired-it !ts more loosely due to an decrease in heat transfer through thecomposite all

$1). /eat damage to fuel inection no%%les on small high speed dieselengines, can "e pre#ented "y-employing fuel oil as a cooling medium-pre#enting hard car"on deposits on no%%le tips-a#oiding fuel oil temperature exceeding "uilder*s speci!cation-ensuring good metallic contact "eteen no%%les and cylinder heads

$1+. When turning a ne cylinder head stud on a lathe, the minimume3ecti#e thread length of the stud is determined primarily "y the-stud length-stud diameter

-head nut diameter-stud material

$18. 4n e5cient seal "eteen the cylinder "loc and cylinder heads onmany diesel engines is o"tained ith-graphite pacing-sealing compound-lu"ricating oil-gasets


53/80

Page ($ of 80

$1. 4 diesel engine fails to start due to excessi#e ater in the fuel.Cefore the engine can "e started, the ater should "e remo#ed from the-fuel lines-lu"e oil !lters-crancase pump

-rocer arm reser#oir

$20. 4 diesel engine fails to start "ecause of ater in the fuel.In order to start the engine, you should-turn engine ith acing gear-drain !lters and strainers and "leed o3 ater at each inection pump-"lo through the cylinders and fuel lines ith a drying agent-all of the a"o#e

. $21. rior to starting, the purpose of turning o#er a main propulsiondiesel engine ith the cylinder test cocs open, is to-test the starting system-remo#e condensation form the cylinders-chec the proper lu"e oil pressure-all of the a"o#e

$22. If you suspect a diesel engine is mis!ring due to air leaage intothe fuel system, you should "egine looing for the lea at the-fuel line connections to the cylinder inection #al#es-gaset surfaces of the fuel oil !lters-discharge !ttings of the fuel inection pumps-suction side of the fuel oil transfer pump

$2$. If you determine that entrained air in the fuel oil system is causinga diesel engine to stall, you should !rst chec for-fuel leaage in the inector pump*s discharge line-orn gasets in the transfer pump*s discharge line-partially clogged fuel oil discharge strainers-loose !ttings in the "ooster fuel pump suction piping

$2&. Which of the folloing procedures should "e carried out to permit theuse of a crosshead engine ith an inopera"le aftercooler?-"ypass the aftercooler to operate at sea speed-run at reduced speed untill the cooler can "e repaired or reneed-sitch to diesel fuel and run at reduced speed-nothing needs to "e done due to the lo heating #alue of hea#y fuel

$2(. If the piston ring gap remains insu5cient hen installing ne rings,you should-install o#ersi%ed rings

-hone the cylinder liner to allo ring installation-compress the rings tighter ith a compressing tool-!le the ends of the rings

$2). When installing rings on a diesel engine piston, you should chec thering-diametrical tension-gap clearance-radial thicness


54/80

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-face thicness

$2+. Oou are installing ne piston rings on a single acting diesel enginepiston. 'o chec the ring gap clearance, the rings should "e placed at the-point of minimum cylinder ear-center of the cylinder

-point of maximum cylinder ear-point of maximum ring ear

$28. Which of the folloing conditions ould reuire the remo#al of atur"ocharger for repair?-niced "lades-"roen "lades-stretched "lades-all of the a"o#e

$2. Which of the folloing precautions should "e taen hen cleaning theair !lter on a diesel engine euipped ith a tur"ocharger?-reduce engine speed to idle "efore remo#ing the !lter-soa the dirty !lter in erosine only-"lo out the air inlet ith compressed air-co#er the air inlet after remo#ing the !lter

$$0. :olloing the failure of one tur"ocharger on a large, crosshead, mainpropulsion diesel engine, !tted ith multiple tur"ochargers, hich of thefolloing actions should "e taen prior to further operation of the engine?-"lan o3 the exhaust gas inlet to the damaged tur"ocharger-secure cooling and lu"rication to the damaged tur"ocharger-loc the rotor of the damaged tur"ocharger-all of the a"o#e

$$1. Which of the listed adustments must "e made to a naturally aspiratedfour-stroe>cycle diesel engine if a tur"ocharger is to "e installed?-increase the compression ratio-increase the exhaust and intae #al#e o#erlap-increase the ignition lag-decrease the amount of exhaust and intae #al#e o#erlap

$$2. Which of the changes in the #al#e timing listed should "e carried outhen a naturally aspirated four-stroe>cycle diesel engine is con#erted toa supercharged engine?-retard the intae #al#e opening and ad#ance the exhaust #al#e closing period-ad#ance the intae and exhaust #al#e opening period-ad#ance the intae #al#e opening and retard the exhaust #al#e closing periods-retard the intae and exhaust #al#e closing period

$$$. 'he purpose of annealing any metal is to mae the metal-softer-smoother-harder-tougher

$$&. When conducting a hydrostatic test on the distillate cooler shell ofa 6ash type e#aporator, liuid appears ell inside one of the tu"es.


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In order to correct this, you should-reroll the tu"e-seal eld the tu"e-plug the tu"e-all of the a"o#e ould "e considered satisfacto

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