chemical engg basic indiabix

8/19/2019 Chemical Engg Basic Indiabix

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1.

Which one of the following is incombustible ?

A. H2 B. CCl4

C. C2H2 D. S

View Answer Workspace Report Discuss in Forum

2.

The softness or hardness of a grinding wheel depends upon the type amount of bondingmaterial used. !or general purpose cutter grinding """""""""" grinding wheel is normally used.

A. hard

B. soft

C. silicon carbide

D. aluminium o#ide


$.

Tin based white metals are used% where bearings are sub&ected to

A. high pressure load.

B. low pressure load.

C. high temperature.

D. large surface wear.


4.

!riction factor for fluid flow in pipe does not depend upon the

A. pipe length.

B. pipe roughness.

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C. fluid density 'iscosity.

D. mass flow rate of fluid.


(.

)ll of the following alloying elements of steel increases hardness but sacrifice ductility% e#cept

A. nic*el B. 'anadium

C. molybdenum D. chromium

+.

The following type of bonding is strongly directional in solids.

A. ,ander Waal-s

B. onic

C. /etallic

D. Co'alant


0.!og is an e#ample of colloidal system of

A. solid dispersed in gas.

B. solid dispersed in li uid.

C. li uid dispersed in gas.

D. gas dispersed in li uid.


.

Chromium molybdenum steel can not be welded using """""""""" welding.

A. thermit



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B. electrical resistance

C. o#y3acetylene

D. any of these


.

Speisses is a mi#ture of the following5

A. )rsenides of hea'y metals.

B. )ntimonides of hea'y metals.

C. )rsenides antimonides of hea'y metals.

D. ron% cobalt and nic*el.


16.

)uto collimator is used to chec*

A. flatness

B. angle

C. rotor balancing

D. roughness

11.

n troposphere 7the weather domain8% the temperature - t - at height - h - abo'e the sea le'el inmetres is gi'en by 7where% temperature at sea le'el is 1(9C and t is in 9C.8

A. t : 1( 3 6.66+( h

B. t : 1( ; 6.66+( h

C. t : 6.66$( h 3 1(

D. t : 1( 3 6.66$( h

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12.

) high pressure boiler generates steam at a pressure greater than """""""""" *gT

B. C/C

C. @A

D. Bead a ide


1(.

/a#well-s thermodynamic relations applies to the

A. chemical systems in e uilibrium.

B. mechanical systems in e uilibrium.

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C. irre'ersible thermodynamic processes.

D. re'ersible thermodynamic processes.

1+.

)nnealing ofwhite cast iron produces """""""""" iron.

A. grey B. nodular

C. malleable D. spheroidal


10.

esistance of an electrical conductor is proportional to its 7where% l : length and A : cross3sectional area of the conductor8

A. A

B. l

C. A2

D. both -a- -b-


1 .

) solar cell con'erts the sunlight directly into """""""""" energy.

A. thermal B. electrical

C. mechanical D. chemical


1 .

f a nuclear reactor produces more fissile nuclear fuel than it consumes% then it is called a """""""""" reactor.

A. critical B. breeder

C. fertile D. heterogenous



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26.

Wrought iron is ne'er shaped by

A. casting

B. cold wor*ing

C. forging

D. welding

21.

Dowder metallurgy process does not ma*e metal powder by

A. atomisation

B. grindingo significant change occurs.

D. ncreases the hydrogen content in the metal.


2$.

Dic* out the wrong statement.

A. ) ferromagnetic material becomes paramagnetic abo'e the -Curie temperature-.



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B.Dermanent magnets are made of hard materials% whereas electromagnets re uire softmagnetic materials.

C.Soft magnetic materials 7e.g.% pure iron8 ha'e higher permeability and low hysterisis lossand coerci'e forces.

D. Tungsten steel and alnico are not hard magnetic materials.


24.

The usual energy consumption in electric arc furnace steel ma*ing is """""""""" EWh


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20.

"""""""""" is the hardest o#ide and is hence used where high wear resistance at hightemperature is re uired.

A. Feryllia B. Girconia

C. )lumina D. /agnesia


2 .

Titanium alloys are welded using the !ollowing process5

A. T welding.

B. Submerged arc welding.

C. Futt welding.

D. =lectron beam welding.


2 .

)n alloy of !e 3 6.4 I C is

A. cast iron.

B. hypo3eutectoid steel.

C. hyper3eutectoid steel.

D. eutectoid steel


$6.

) material in which the atoms are arranged regularly in some directions but not in others% istermed as -mesomorphous material-J an e#ample of which is

A. lead B. glass

C. mica D. sil'er



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$1.

n e#trusion of metals% which of the following statement is true ?

A. speed of the e#truded material is same as that of ram speed.

B. edundant wor* is a function of the die angle.

C. elati'e motion between the billet surface and the container wall is always present.

D. Hollow ram is used for indirect e#trusion.


$2.

>uclear fission of one atom of uranium32$( produces the energy e ui'alent to about """"""""""/e,.

A. 26 B. 266

C. (66 D. 1666


$$.

Which of the following parameters is not responsible for the heat loss from a hot steam carryingbare pipe surface located in a room without fans ?

A. =missi'ity of pipe surface.

B. @iameter length of the pipe.

C. Temperature of hot pipe surface that of air in the room.

D. none of these.


$4.

/achinability of hard alloys and tool steels is impro'ed by

A. spherodising B. annealing



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C. tempering D. normalising


$(.

Transformation range for ferrous material is the temperature inter'al during which """""""""" isformed during its heating.

A. cementite B. austenite

C. martensite D. pearlite

$+.

/a#imum amount of thermal radiation is emitted at all wa'elengths at any specified temperatureby a


11/123


$ .

)bsolute ero pressure can be attained at a temperature of

A. 69C

B. (69E

C. 69

D. none of these


46.

The product out from a cupola is called

A. wrought iron

B. pig iron

C. cast iron

D. none of these

41.>usselt number is related to rashoff number 7 Gr 8 in turbulent laminar f low respecti'ely% inrespect of free con'ection o'er a 'ertical flat plate as

A. Gr 6.2( %Gr

B. Gr 6.2( %Gr 6.$$

C. Gr %Gr 6.2(

D. Gr 6.$$

%Gr 6.2(


42.

f the demand for an item is trebled and the order cost is reduced to one third% then the economicorder uantity



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A. is trebled.

B. remains unchanged.

C. decreases by a factor of $.

D. decreases by a factor of 1


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C. eynolds number.

D. rashoff number Drandtl number.


40.

The most economical channel section for the fluid flow is the one for which the discharge isma#imum for a gi'en cross3sectional area. ,ertical 'elocity distribution in an open channel forlaminar flow can be assumed to be

A. parabolic

B. hyperbolic

C. straight line

D. none of these


4 .

=nergy of the sun arises mainly from """""""""" reactions.

A. fusion

B. fission

C. combustion

D. none of these


4 .

Which of the following fastening de'ices has a head at one end and a nut fitted to the other ?

A. Folt

B. Stud

C. Top bolt



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D. >one of these


(6.

Sudden fall of atmospheric pressure by a large amount is an indication of the

A. rain

B. cold wa'e

C. storm

D. fair weather

1.

n chemical dehumidification process

A. wet bulb temperature increases.

B. dry bulb temperature remains constant.

C. dew point temperature increases.

D. dry bulb temperature increases.


2.

Secondary hardening in steels arises out of the

A. precipitation of fine alloy carbides at high temperatures.

B. refinement of ferrite grain si e by wor*ing.

C. decomposition of retained austenite upon heat treatment.

D. precipitation of comple# inter3metal3lics upon heat treatment.


$.

@rills are usually made of



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A. cermets

B. high speed steel

C. alloy steel

D. tungsten carbide


4.

Tumbling is the process of impro'ing the """""""""" of the materials


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+.

"""""""""" of air does not increase with increase in temperature.

A. @ensity

B. Thermal diffusi'ity

C. ,iscosity

D. Thermal conducti'ity


0.

Spherical shape of mercury droplets is due to its

A. high 'iscosity.

B. low surface tension.

C. high density.

D. high surface tension.


.Sub ero treatment of steel is done to

A. suppress martensite transformation.

B. enhance its wor*ing performance in sub ero atmosphere.

C. reduce the retained austenite in hardened steel.

D. induce temper brittleness after its hardening.


.

)ir3petrol ratio for ma#imum power generation in spar* ignition engine is about

A. +51



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B. 12 5 1

C. 1 5 1

D. 24 5 1


16.

Which of the following 'aries as the s uare root of oil pressure during atomisation of fuel oilthrough a pressure &et burner ?

A. Nutput fineness

B. ,elocity

C. Foth 7a8 7b8

D. >one of these

11.

The most suitable material of construction for a sewer to carry sewage under high pressure is

A. asbestos cement

B. steel

C. cement concrete

D. stoneware


12.

!iller material used in welding should ha'e """""""""" as compared to the parent metal to bewelded.

A. lower melting temperature

B. same melting temperature

C. same composition

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A. tempered B. normalised

C. annealed D. hardened


10.

The dew point temperature lines on psychrometric charts are straight inclined sloping downwardsto the right. When relati'e humidity of moist air is 166I% then

A. wet bulb temperature:dry bulb temperature.

B. wet bulb temperature:dew point temperature.

C. saturation temperature:dew point temperature.

D. all -a- % -b- -c-


1 .

al'anic corrosion can not be pre'ented by

A. cathodic protection.

B. anodic protection.

C. usage of largest possible anodic area.

D. any one of these.


1 .

!ire in fuel gas pipelines is e#tinguished most effecti'ely by

A. spraying water.

B. blan*etting the area with nitrogen atmosphere.

C. fire fighting foam.

D. none of these.



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26.

Which of the following is the most suitable abrasi'e for grinding high tensile strength materials ?

A. Silicon carbide

B. Corundum

C. )luminium o#ide

D. Foron carbide

21.

Case hardening is not done by

A. nitriding

B. hot dipping

C. electroplating

D. both b c


22.Satellites burn off during re3entry to earth-s atmosphere% because of the

A. combustion with air.

B. gra'itational pull by earth.

C. friction with earth-s atmosphere.

D. loss in weight of the satellite.


2$.

With increase in compression ratio% the 'olumetric efficiency of air compressor

A. increases.



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B. decreases.

C. remains same.

D. may increase or decrease 7depends on the suction pressure8.


24.

>eutrons are present in all atoms e#cept that of

A. He B. C

C. H D. )r


2(.

Fiological shield in a nuclear reactor is generally pro'ided to protect against the

A. L3rays

B. M3rays

C. gamma rays neutrons

D. electrons

2+.

"""""""""" circuit is most commonly used to measure strain with the help of a strain gauge.

A. Fallast

B. ,oltage balancing potentiometric

C. Simple current sensiti'e

D. none of these


20.

Which of the following is normally not found in both the S. . 7petrol8 C. . 7diesel8 engines ?



22/123

A. )ir filter

B. !uel in&ector

C. =#haust silencer

D. Fattery


2 .

"""""""""" is a special constituent of chlorophyll without which photosynthesis is not possible.

A. Calcium B. >itrogen

C. Dhosphorous D. Hydrogen


2 .

"""""""""" is used as a material of construction for the blade of power saw.

A. Wrought iron

B. Stainless steel

C. /ild steel

D. High speed steel


$6.

@uring decarburising of a plain carbon steel% the thic*ness of ferrite layer growth is proportional to

A. time

B. s uare root of time

C. s uare of time

D. cube of time



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$1.

Baser welding is widely employed in the """""""""" industries.

A. electronic B. structural

C. process D. hea'y


$2.

@ryness factor of steam is defined as the ratio of the mass of 'apor in the mi#ture to the mass ofthe mi#ture. @ryness factor of steam is measured by a """""""""" calorimeter.

A. bomb B. throttling

C. Pun*er-s D. Foy-sView Answer Workspace Report Discuss in Forum

$$.

Which of the following is used to produce draught in the locomoti'e boilers ?

A. Chimney.

B. nduced draught fan.

C. !orced draught fan.

D. Steam &et arrangement.


$4.

Temper brittleness of a material can be fairly detected by the """""""""" test.

A. fatigue

B. notched bar impact

C. tensile

D. hardness




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$(.

When the wa'elength of incident A3rays increases% the angle of diffraction

A. decreases.

B. increases.

C. remains constant.

D. shows no systematic 'ariation.

$+.

The elastic strain energy of a unit length of an edge dislocation as compared to that of a screwdislocation is

A. more B. e ual

C. less D. double


$0.

The specific gra'ity of coal depends mainly on its """""""""" content.

A. carbon

B. 'olatile matter

C. ash

D. moisture


$ .

n case of condensers e'aporators operating under gi'en terminal conditions% B/T@ 7logarithmic

mean temperature difference8 for counter flow as compared to that for parallel flow is

A. more

B. less

C. e ual



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D. much more


$ .

>ormalising does not """""""""" of a metal.

A. impro'e machinability tensile strength

B. remo'e internal stresses

C. refine the structure

D. remo'e strains caused by cold wor*ing


46.

Which of the following hardness tests does not measure the indentation hardness of metals andalloys ?

A. ,ic*er-s hardness test.

B. Shore sceleroscope test.

C. Frinell hardness test.

D. oc*well hardness test.

41.

With increase in annealing temperature% the following defect density decreases.

A. ,acancy

B. @islocation

C. rain boundary

D. )ll of them




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42.

Carnot cycle is also termed as the constant """""""""" cycle in thermodynamics.

A. entropy B. pressure

C. 'olume D. heat


4$.

Thermistors are used in """""""""" de'ices.

A. 'oltage measuring

B. temperature measuring

C. temperature compensating

D. both 7b8 7c8


44.

Froaching tools are usually made of

A. cermets

B. high speed steel

C. tungsten carbide

D. stellite


4(.

The ratio of the shear stress to the principal stress on a principal plane is

A. 6 B. 1

C. 1


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tan*8

A. H B. H


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D.The stress re uired to cause plastic flow in polycrystalline material is higher as comparedto monocrystalline materials due to the presence of grains of different orientations.


(6.Consider the e uilibrium A7g8 ; B7g 8 : AB7g 8. When the partial pressure of A is 16 32 atm% the partialpressure of B is 16 3$ atm and the partial pressure of AB is 1 atm% the e uilibrium constant -E- is

A. 16 atm 31

B. 16 ( atm 31

C. 16 7dimensionless8

D. 16(

7dimensionless8

1.

n the formation of cermets% the ratio of ceramic material to metallic material is usually 6526.Which of the following is a cermet ?

A. Girconia

B. )lumina

C. Fa*elite

D. Tungsten carbide


2.

=n ymes belong to the category of

A. proteins B. carbohydrates

C.'itamins

D.fats


$.

What is the 'alue of included angle of a triangular notch for ma#imum discharge ?

A. $69 B. +69



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C. 69 D. 1269


4.

!or separating small pieces of metal from engine oil of a car% the best separating techni ue is the

A. chromatography

B. e'aporation

C. filtration

D. fractional distillation


(.

Heat flow across a hollow sphere of inner radius - r 1- and outer radius - r 2- is directly proportional to

A.

B.

C.

D.

+.

Nn oscilloscope screen for dynamic measurement% lissa&ous diagram is normally used to determinethe """""""""" of the input signal.

A. fre uency

B. amplitude

C. damping



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D. none of these


0.

!ire refining process is employed in case of

A. tin B. copper

C. inc D. aluminium


.

Barger length diameter water pipes are made by

A. electrical resistance welding.

B. die casting.

C. semi3centrifugal casting.

D. continuous casting.


.

Carbide tipped cutting tools are manufactured by powder metallurgy techni ues and ha'e acomposition of

A. 6I tungsten carbide and 16I cobalt.

B. 06I aluminium o#ide $6I silica.

C. $6I nic*el% 1(I chromium ((I tungsten.

D. +(I tungsten $(I irconium.


16.

The temperature at which ferromagnetic material can no longer be magnetised by the outside



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forces% is termed as the

A. critical point.

B. curie temperature.

C. in'ersion temperature.

D. eutectic temperature.

11.

Faffles pro'ided on the shell side of a shell and tube heat e#changer are meant for

A. pro'iding support for the tubes.

B. impro'ing heat transfer.

C. both -a- -b-.

D. pre'enting the fouling of tubes stagnation of shell side fluid.


12.

When an isolated thermodynamic system e#ecutes a process%

A. wor* is done.

B. heat transfer ta*es place.

C. mass flow occurs across the boundary of the system.

D. no chemical reaction ta*es place within the system.


1$.

Frittleness induced due to the presence of sulphur in steel can be reduced by adding

A. manganese B. magnesium

C. 'anadium D. copper



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14.

)tomic """""""""" of an element is a whole number.

A. weight B. number

C. 'olume D. radius


1(.

The boiling free ing points on a newly defined temperature scale in degree -@- are 4669@ 1669@ respecti'ely. The temperature reading corresponding to +69C on this new temperaturescale will be e ual to """""""""" 9@.

A. 146 B. 1 6

C. 246 D. 2 6

1+.

Which of the following is an uncon'entional source of energy ?

A. Thermal power

B. Hydroelectric power

C. >uclear3fusion power

D. Solar power


10.

The product 7s8 of roasting of a sulphide ore is 7are8

A.o#ide only.

B. sulphate only.

C. o#ide and sulphate.

D. dependent on temperature and partial pressure of o#ygen sulphur dio#ide.



33/123


1 .

Which of the following are considered applications of ultrasonic testing ?

A. @etermination of elastic constant.

B. @etection of defects in metal.

C. /easurement of material thic*ness.

D. >one of the abo'e.


1 .

Suitability of steel for its use in cable is &udged by its strength in

A. tension B. compression

C. torsion D. shear


26.

Hydrogen in li uid steels is dissol'ed

A. as tiny gas bubbles.

B. in the atomic form.

C. in the ionic form.

D. in the molecular form.

21.

"""""""""" iron is produced by the annealing of white cast iron.

A. /alleable B. >odular

C. @uctile D. rey




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22.

The mechanism which changes the 'alue of manipulated 'ariable in response to the output signalfrom the control unit is called the

A. final control element.

B. on3off control.

C. floating control action.

D. none of these.


2$.

!ahrenheit and Centigrade scales ha'e the same readings at

A. 3((9 B. 3469

C. 3$$9 D. 3( 9


24.

Which of the following low melting alloy containing bismuth and lead is used for electric fuse ?

A. Wood-s metal

B. Fabbit metal

C. /onel metal

D. @uralumin


2(.

Water3tube boiler is the one% in which

A. water passes through tubes and flue gases around it.

B. tube carrying hot flue gases are immersed in a pool of water.



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C. tubes are placed in 'ertical position.

D. none of these.

2+.

@ephosphorisation of molten pig iron is fa'oured by

A. o#idising and basic slag.

B. reducing and basic slag.

C. high acti'ity co3efficient of phosphorous in metal.

D. o#idising and neutral slag.


20.

n a neutral solution

A. H; ions are absent.

B. NH 3 ions are absent.

C. both H ; and NH 3 ions are present in 'ery small but e ual concentration.

D. none of these.


2 .

Which of the following commonly used condenser tube materials has the lowest thermalconducti'ity?

A. )dmirability brass.

B. Stainless steel.

C. )luminium brass.

D. Titanium.




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2 .

Strain hardening effect in a metal sub&ected to cold wor*ing is due to the """"""""""mechanism.

A. fracture B. dislocation

C. slip D. twinning


$6.

) common disinfectant used in 'illage wells for disinfection of water is

A. free chlorine

B. bromine

C. iodine

D. potassium permanganate

$1.

/oist air is cooled along the line of constant """""""""" % when it is passed o'er a cold drycooling coil% such that no condensation occurs?

A. enthalpy

B. relati'e humidity

C. wet bulb temperature

D. dew point temperature


$2.

Which of the following metals can not be hot wor*ed at room temperature ?

A. Ginc B. >ic*el

C. Bead D. Tin




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$0.

The surface tension of a li uid% at critical temperature is

A. indeterminate.

B. ero.

C. infinity.

D. same as that at any other temperature.


$ .

Barge scale fire on fuel gas line is normally e#tinguished by

A. water B. steam

C. foam D. nitrogen


$ .

Fra ing is the &oining of metals

A. without melting the base metal.

B. with a non3ferrous filler.

C. both 7a8 7b8.

D. neither 7a8 nor 7b8.


46.

/oist climate is the most fa'ourable factor in the site selection far a

A. steel plant

B. te#tile factory



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C. petroleum refinery

D. co*e o'en battery

41.

@ry saturated steam can be con'erted into superheated steam by

A. increasing its cross3sectional area of flow.

B. passing it through a pressure reducing 'al'e.

C. forcing it downwards through a 'ertical tube.

D. none of these


42.

Dic* out the wrong statement.

A. Copper is the metal ha'ing the highest electronic conducti'ity.

B. Hardenability weldability of metals are in'ersely related.

C.Co'alant bonding formed by sharing of electrons is present in all semi3conductormaterials.

D. lass transition temperature applies to -polymers- but not to -glasses-.


4$.

ncreasing sulphur content in pig iron tends to ma*e it

A. soft

B. hard

C. tough

D. ductile malleable




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44.

N#yacetylene reducing flame is used while carrying out welding on

A. alloy steel

B. grey cast iron

C. mild steel

D. high carbon steel


4(.

/ 16 inde# of co*e indicates its

A. compressi'e strength.

B. hardness.

C. abrasion resistance.

D. impact strength.

4+.

antt charts are used for streamlining the

A. in'entory control

B. production schedule

C. sales forecasting

D. uality control


40.

n the Fayer-s process% bau#ite is digested under pressure using

A. H2SN 4 B. >aNH

C. >H $ D. HCl

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4 .

Circular cross section machine parts which are symmetrical about the a#is of rotation are madeby hot

A. piercing B. spinning

C. drawing D. e#trusion


4 .

The substance used as a smo*e screen in warfare is

A. C2H2 B. SiCl 4

C. D2N ( D. DCl(


(6.

The same 'olume of all gases is representati'e of their

A. specific gra'ities.

B. densities.

C. gas characteristic constants.

D. molecular weights.

1.

!luorine is not a constituent of

A. freon B. chloroform

C. teflon D. fluorocarbons


2.

The most commonly used combustion system manufactured in ndia for the thermal power plant

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boilers is the """""""""" combustion system.

A. pul'erised fuel

B. tra'elling grate sto*er firing

C. circulating fluidised bed

D. fluidised bed


$.

@uring solid state sintering of powders% the following mechanism can be acti'e.

A. ='aporation and condensation.

B. Solid state diffusion processes.

C. Bi uid formation in grain boundaries.

D. Creation of more dislocations.


4.The transition temperature at which all the ferromagnetic materials become paramagneticmaterials is termed as the -Curie temperature-. ts 'alue for cobalt is """""""""" 9C.

A. 0+ B. 1120

C. 1$( D. 14 6


(.

egeneration of molecular sei'e re uires it to be heated to a temperature of about """"""""""9C.

A. 63126 B. 2663$66

C. +663 66 D. 166631166



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+.

The ultimate strength in tension for steel is """""""""" times the ultimate strength in shear.

A. 6.( B. 6.

C. 1.( D. 2.(


0.

The acti'ity of pure hydrogen gas at 16669C and ( atm pressure

A. is always less than 1.

B. is always greater than 1.

C. can be (.

D. depends on the choice of the standard state.


.

Which of the following transducers is most commonly used for the measurement of shoc* and'ibration ?

A. Binear 'ariable differential transducer 7B,@T8

B. @ial gauge

C. )ccelerometer

D. none of these


.

The power of a low capacity prime mo'er is most suitably measured by a """""""""" typedynamometer.

A. dri'ing

B. transmission



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C. absorption

D. none of these


16.

"""""""""" addition increases the depth of hardness of steel.

A. Chromium B. >ic*el

C. Tungsten D. ,anadium

11.

The most important consideration in 'alue engineering is the

A. profit ma#imisation.

B. customer satisfaction.

C. cost reduction.

D. process impro'ement.


12.Bime contains about 6I CaN. Dercentage CaN present in limestone is about

A. 2( B. (6

C. 06 D. 6


1$.

The most important material handling system in an integrated steel plant is the

A. belt con'eyor

B. diesel locomoti'e

C. truc*



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D. o'erhead hoists cranes


14.

Droperty of a material to resist a tensile force without gi'ing away is a measure of its

A. stiffness B. toughness

C. resilience D. tenacity


1(.

Cast iron has the uni ue property of high

A. ductility

B. damping characteristics

C. hardness

D. malleability

1+.

Steels with high carbon e ui'alent ha'e poor weldability% because in these steels during welding

A. carbon and other alloying elements get o#idised from the weld pool.

B. e#cessi'e ferrite forms in the heat affected one leading to poor toughness of the weld.

C.martensite forms in the heat affected one leading to poor toughness


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B. Q 0

C. R 0

D. 6


1 .

/easurement of the area of the indented surface is not in'ol'ed in the """""""""" hardhestesting method.

A. ,ic*er-s B. oc*well

C. Enoop D. Frinell


1 .

Sal'age 'alue is the most fle#ible criteria for analysing a financial in'estment. -Sal'aging- means

A. disposing off a machine


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A. elastic limit

B. bend radius

C. degree of bend

D. thic*ness of sheet


22.

The yield point in fatigue loading compared to that in static loading is less. The ratio of ultimatetensile strength to endurance limit of a material sub&ected to fatigue loading is

A. 6.( B. 1

C. 1.( D. 2


2$.

Which of the following is not used as a fuel in roc*et propellaht ?

A. Bi uid hydrogen

B. Bi uid o#ygen

C. Bi uid hydra ine

D. Eerosene oil


24.

Hypo 7sodium thiosulphate8 because of its comple# forming beha'iour is used in photography toremo'e undecomposed sil'er bromide as a soluble comple# for """""""""" of the picture.

A. printing B. de'eloping

C. colour D. fi#ation



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2(.

Temperature of hot gases flowing in a pipe is measured by a thermocouple inserted in the thermalwell. The thermal well made of """""""""" will facilitate the most accurate measurement of the

temperature.

A. copper B. steel

C. aluminium D. brass

2+.

"""""""""" welding will be the most suitable for butt welding two 26 cms thic* boiler drum mildsteel plates.

A. =lectrical resistance

B. =lectroslag

C. Dlasma torch

D. Submerged arc


20.

/achinability of hard alloys tool steels is impro'ed by

A. spherodising B. annealing

C. tempering D. normalising


2 .

B)S=

A. stands for Bight )mplification by Stimulated =mission of adiation.

B. has the same intensity as 'isible light.

C. can-t be used for cutting metals.

D. none of these.



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2 .

"""""""""" forces do not act in case of fluids.

A. ,ibratory B. Centrifugal

C. =lastic D. Tensile


$6.

Which of the following is not a natural abrasi'e ?

A. Silicon carbide

B. uart

C. Corundum

D. =mery

$1.

The function of a no le pro'ided in steam turbine is to

A. throttle down 7i.e.% reduce8 the pressure of steam.

B. con'ert internal energy into *inetic energy.

C. increase the 'elocity of steam.

D. all 7a8% 7b8 7c8.


$2.

Which of the following polymers is obtained by copolymerisation of three monomers ?

A. S)> B. )FS

C. SF D. DT!=



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$$.

Silicon percentage in the silicon steel used for electrical appliances


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D. none of these.


$0.

Three elastic constants for a completely anisotropic elastic material which follows the Hoo*e-s laware young-s modulus% elastic limit stress and yield stress. Which of the following properties is mostsensiti'e to increase in strain rate ?

A. Tensile strength.

B. =lastic limit.

C. Droportional limit.

D. ield strength.View Answer Workspace Report Discuss in Forum

$ .

Swaging is a


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parameters.

A. Stac*ing fault energy.

B. ecrystallisation temperature.

C. Solidus temperature.

D. Transformation temperature.

41.

Einematic 'iscosity of water as compared to that of air is

A. more

B. same

C. 1(I more

D. 1(I less


42.

Which of the following is the most suitable for remo'ing fine particles 7Q 1 micron diameter8 from

air below its dew point ?

A. ,enturi scrubber

B. =lectrostatic precipitator

C. Cyclone separator

D. !abric filter


4$.

Which of the following is the terminology used for the temperature at which the phase changesoccur in a metal ?

A. Critical temperature.



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B. ecrystallisation temperature.

C. Dhase transformation temperature.

D. Transition temperature.


44.

Duddling process is used for con'erting pig iron into

A. cast iron

B. wrought iron

C. mild steel

D. semi3steel


4(.

)ddition of """""""""" in steel can help in increasing the depth of hardness.

A. nic*el B. chromium

C. 'anadium D. tungsten

4+.

Nn3off control

A. fully opens the final control element% when the measured 'ariable is below the set point.

B. fully closes the final control element% when the measured 'ariable is abo'e the set point.

C.is a two position control 7fully open or fully closed8 control ade uate to control aprocess with slow reaction and minimum dead time or transfer lag.

D. none of these.


40.

The tensile load3elongation cur'e of a metal does not describe



54/123

A. wor* hardening

B. yield stress

C. anisotropy inde#

D. nec*ing strain


4 .

Usual 'alue of the resistance suitable for a wire resistance strain gauge is """""""""" ohms.

A. 26 B. 6

C. 126 D. (66


4 .

Dermanent set in a material is produced by sub&ecting it to

A. tria#ial loading.

B. fatigue loading.

C. stresses beyond the elastic limit.

D. tensile compressi'e loads simultaneously.


(6.

The following is a typical anionic collector used in flotation.

A. =thyl di#anthogen.

B. Trimethyl cetyl ammonium bromide.

C. Dotassium ethyl #anthate.

D. l)uryl amine hydrochloride.



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1.

) solution which resists change in its pH 'alue on addition of acid


56/123

A. >odulising B. Delletising

C. Falling D. Fri uetting


(.

With increase in temperature% the surface tension of water

A. increases

B. decreases

C. remains constant

D. increases linearly

+.

) reduction in thermal resistance during heat transfer does not occur in the

A. con'ection heat transfer by stirring the fluid and cleaning the heating surface.

B.conduction heat transfer by reduction in the material thic*ness and increase in thethermal conducti'ity.

C. radiation heat transfer by increasing the temperature and reducing the emis3si'ity.

D. none of these.


0.

Unit of 'iscosity in C S system is

A. gm .cm 31 sec 31

B. gm . cm 2 . sec 32

C. gm .cm 32% sec31

D. gm . cm . sec 31




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.

Shaftone of these


16.

The rolling process can not be used to produce

A. plates B. rods

C. tubes D. wires

11.

Co3efficient of performance of a Carnot cycle refrigerator operating between 3 2$9C and ; 209C is

A. $ B. (

C. 6.( D. 1.(




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12.

Dresence of nic*el chromium in steel does not raise its

A. elastic limit

B. machining properties

C. ductility

D. resilience


1$.

Hot e#trusion process is not used for ma*ing

A. cast iron pipe for domestic water supply.

B. aluminium curtain rods.

C. stainless steel tubes used in furnitures.

D. any of these.


14.)ddition of """""""""" to steel does not help in impro'ing its machinability.

A. sulphur B. silicon

C. lead D. phosphorous


1(.

uart is a """""""""" material.

A. diamagnetic B. ferromagnetic

C. ferroelectric D. pie oelectric



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60/123

B. Tungsten carbide

C. >ic*el carbide

D. ron carbide


26.

The ratio of mass of a neutron to that of an electron is about 1 $ . What is the ratio of themass of a proton to that of an electron?

A. 1( B. 1 $0

C. 2($0 D. 16666

21.

Baser is a de'ice to produce

A. gamma rays.

B. microwa'es.

C. a beam of white light.

D. a beam of coherent light.


22.

)ddition of small amount of """""""""" to grey cast iron is done to produce nodular grey castiron.

A. manganese B. phosphorous

C. magnesium D. chromium


2$.

/inimum thermal efficiency of a steam boiler may be around """""""""" percent

A. 2( B. 4(



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C. +( D. 26


24.

The temperature at which the magnetic property of iron disappears 7i.e.% it becomes non3magnetic8 and its electrical conducti'ity specific heat also changes% is called the -Curie point-%which is """""""""" 9C.

A. 0+ B. 6

C. 1466 D. 1($


2(.

!atigue limit impro'ement by o'er stressing the metal by successi'ely increasing theload is called coa#ing. n fatigue failure% the material fails

A. below the yield point.

B. abo'e the yield point.

C. below the elastic limit.

D. at the elastic limit.

2+.

The malleability of a material is the property by 'irtue of which it can be rolled or hammeredinto thin sheets. Which of the following materials has the ma#imum malleability ?

A. Bead

B. Copper

C. )luminium

D. Wrought iron


20.

Darticle nature of cathode rays is pro'ed due to the fact that they



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A. tra'el in a straight line.

B. get deflected by magnetic electric field.

C. produce fluorescence.

D. heat the e#posed material.


2 .

The most commonly used moderator in nuclear power plants is

A. graphite

B. light water

C. hea'y water

D. berellium


2 .

Fabbit lining is used on brass


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C. acid and wea* base.

D. none of these.

$1.

Poining of thin foils is preferred to be done by

A. gamma rays

B. A3rays

C. microwa'es

D. gas welding


$2.

Which of the following metals reacts 'iolently with water ?

A. /ercury B. Sodium

C. Calcium D. /agnesium


$$.) steam carraying pipeline is insulated with two layers of insulating materials with the inferiorinsulation material forming the inner part. f the two insulating layers are interchanged% the heatconducted will

A. increase.

B. decrease.

C. remain unaffected.

D. may increase or decreaseJ depends on the thic*ness of each layer.


$4.

@amage to metal surface by mechanical action is called



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A. pitting

B. corrosion

C. erosion

D. none of these


$(.

The escape 'elocity of a body on earth which is independent of its mass is about """"""""""*m


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$ .

The process of remo'al of scale formed during hot rolling of steel is termed as

A. descaling

B. shot blasting

C. pic*ling

D. s*imming


$ .

) psychrometer does not measure the """""""""" temperature of moist air.

A. dew point

B. dry bulb

C. wet bulb

D. none of these


46.

)n ideal material for ma*ing coo*ing 'essels should ha'e

A. high heat capacity.

B. low heat capacity.

C. high thermal conducti'ity.

D. both 7b8 and 7c8.

41.

Which of the following approaches the ideal gas beha'iour most closely ?



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