guide questionnaires for seafarers · watchkeeping for seafarers, 1978, as amended and...

MANAGEMENT – ENGINE

REPUBLIC OF THE PHILIPPINES

DEPARTMENT OF TRANSPORTATION

MARITIME INDUSTRY AUTHORITY STCW OFFICE

GUIDE QUESTIONNAIRES

for seafarers

The Annual Publication of Database of Questionnaires is mandated in Republic Act 10635 or the Act Establishing the Maritime Industry Authority (MARINA) as the Single Maritime Administration Responsible for the Implementation and Enforcement of the 1978 International Convention on Standards of Training, Certification and Watchkeeping for Seafarers, 1978, as amended and International Agreements or Covenants related thereto and its Implementing Rules and Regulations. These sample questions have been reviewed and validated by our respective Board of Examiners which may serve as a guide for the review of aspiring Marine Deck and Engineering Officers, towards the successful completion of the Theoretical Examination. The following sample questions do not reflect the actual set of database of questions given during the theoretical examination. Examinees are encouraged to study the contained sample questions and probable answers as they are intended to give an indication of the format and difficulty level of the theoretical examination. You may access these guide questionnaires with your smart gadgets anywhere and anytime at your convenience. Please consider the environment before printing. Thank you.

A Publication of the MARINA STCW Office


FUNCTION 2 – Competence 5 1. What do we call the number if vibrations made per second? 2. What is an electric controller for accelerating a motor from rest to normal

speed and for stopping the motor and design for starting a motor in either direction of rotation includes the additional function of reversing?

3. You are paralleling two alternators and the synchronizing lamps remain

lighted as the synchroscope pointer approaches the zero degree position. This indicates that the _________.

4. How are the power transformers rated? 5. In an automated control system, which of the following statements would

apply to any type of closed looped system? 6. When paralleling two AC generators, what should be the frequency of

the incoming machine prior to closing its breaker? 7. Across the line starters are used with AC motors to obtain______. 8. Raising the generator field excitation to a DC propulsion motor in a

diesel-electric plant will _________. 9. When a controller is provided with reset rate adjustment, a change in this

adjustment results in a change of the __________. 10. Air gap readings should be taken periodically on electrical generation

equipment to __________. 11. A displacer level sensor uses a _________ . 12. In a governor, what is the fall in speed which occurs as the load on the

engine increased? 13. In AC motor turboelectric power plant, the propeller speed is controlled

by varying the_________. 14. One of the generator bearing shells is generally insulated from the end

housing in order to prevent __________.


15. The kind of transformer where the high voltage winding is entirely wound over the low voltage winding is called the _____________.

16. A change in field excitation of an alternator operating is parallel will bring

change to its _________. 17. In simple harmonic motion, what term means the time it takes a body to

move from one end of the path to the other end and back again? 18. An electric device that must be fitted in all generators circuit breakers

is_______________. 19. Prior to closing the circuit breaker when paralleling two DC generators,

you must be certain that the __________. 20. When paralleling two AC generators, the synchroscope selector switch

and frequency meter switch should be set-up to monitor of what frequency?

21. Load is added to an AC generator with a constant field excitation, the

prime mover slows down when_______________. 22. On large generators, space heaters are used to __________. 23. For most auxiliary diesel generator engines, the over-speed trip device

will stop the engine by______. 24. If an AC generator is paralleled to the bus with a different phase rotation

than the bus, what will occur? 25. From among the choices, what is the reactive power drawn by a motor

from an AC generator? 26. What determines the division of kilowatt load between two paralleled

alternators? 27. Equalization of the power factors of two alternators operating in parallel

is accomplished_____. 28. What is the approximate voltage per cell produced by the nickel-iron

(Edison) battery?


29. What is the maximum allowable primary current of a 2 KVA step - down transformer with a four to one turns ratio if connected across a 440 volt line?

30. What is the approximate discharge voltage produced by one cell of a wet

type nickel-cadmium battery? 31. What is the normal open-circuit voltage of one cell of a fully charged

lead-acid battery? 32. What should be the ideal in-service temperature of a running electric

motor bearing? 33. Which of the listed sections of an emergency switchboard is used to

supply power for alarm signals under emergency conditions? 34. An emergency generator driven by an internal combustion engine, shall

be tested under load for a minimum of 2 hours at least once every ___. 35. The open-circuit voltage of a fully charged lead-acid battery cell is

_______ . 36. A milliammeter with a full scale deflection reading of 100 milliamps is

known to have an accuracy of plu or minus 2%. A meter reading of 5 milliamps would indicate a line current of between _____.

37. A milliammeter, with a full scale deflection reading of 100 milliamps, is

known to have an accuracy of + or - 2%. A meter reading of 10 milliamps would indicate a line current of between.

38. Basic electrical motor action depends on_______. 39. Basic electrical motor action depends on _______________. 40. When used for taking resistance measurements, a volt-ohm-

milliammeter is normally powered by ____. 41. In an alternating current electrical system, a low system power factor is a

direct sign of ____. 42. When a resistor is used as a shunt and is connected in parallel with a

meter movement coil, it will provide _____.


43. When a resistor is used as a shunt and is connected in parallel with a meter movement coil, it will provide _____.

44. With both ends of a three conductor cable disconnected and arranged

without the conductors touching each other, an ohmmeter reading of 'zero' ohms between the ends of one conductor would indicate_____.

45. For practical purposes, in a simple series circuit employing two resistors,

the largest voltage drop will occur across the resistor which has _____. 46. An ammeter reads slightly „zero‟ when its lead is disconnected, this is a

result of ______. 47. A series wound DC motor has its armature and field connected in series

with a resistor. When the motor is disconnected from its power supply, this motor will exemplify _____.

48. In a simple series circuit, the entire source voltage will drop across

_____. 49. What is the function of damper windings in a synchronous motor ? 50. Which of the following equipment below is not fitted to the generator

trouble detecting system? 51. Common nickel-cadmium and nickel-iron storage batteries utilize _____. 52. Motor name plate data includes, C rise. What does C rise mean? 53. What do you call a valve which is operated by an electromagnet? 54. Line losses in a distribution circuit are kept to a minimum by _____. 55. Four lamps are connected in parallel in a single circuit. If one of the

lamp burns out, the others will _____. 56. On a main switchboard, If all three ground detection lamps burn with

equal intensity when the test button is depressed, which of the listed conditions is indicated?

57. If all three ground –detection lamps continue to burn at equal intensity

after the test button is depressed and released, which of the listed conditions is indicated?


58. An instantaneous-trip type fuse will_____. 59. The use of four diodes, in a full -wave bridge rectifier circuit, will_____. 60. Why is it necessary to reduce the charging rate of a lead -acid battery

when it is near full charge? 61. Which of the following statements describes the significance of ambient

temperature in relation to the service life of electronic components? 62. The RPM of an AC generator can be measured with a/an _____. 63. Which of the meters listed should only be used after a circuit has been

electrically de-energized? 64. Which of the instruments listed could be used to locate a grounded field

coil in a synchronous motor? 65. What determines the division of kilowatt load between two paralleled

alternators? 66. The Wheatstone bridge is a precision measuring instrument utilizing the

principle of changes in____ . 67. Electrical circuits are protected against overheating by means of a/an

___. 68. What do you call a device which prints out a permanent record of the

plant operating conditions? 69. When testing for blown fuses in a three-phase supply circuit to a motor,

you should first ___. 70. Electrical power loss due to hysteresis is a result of _____. 71. Which of the following components are used to convert AC produced in

the generator windings to direct current? 72. All feeder circuit breakers are molded-case circuit breakers, which mean

______________.


73. In order to protect the generator in service from overload, the non-essential load is isolated from the system by what device?

74. The rated temperature rise of an electric motor is the_______. 75. The RMS value of a sine-wave current may also be expressed as the

_____.

76. Ammeters and voltmeters used in sinusoidal AC power systems indicate which of the following values of the waveforms measured?

77. An electric tachometer receives the engine speed signal from a_____. 78. In process control terminology, continuously variable values which

change without distinct increments, such as temperature, pressure, or level are called_____.

79. An adjustable resistor, whose resistance can be changed without

opening the circuit in which it is connected, is called a ____. 80. When a fluorescent lamp has reached the end of its useful life, it should

be replaced immediately, or the resultant flashing may ___. 81. A resistance in a circuit of unknown value is to be tested using the

voltmeter/ammeter method. Therefore, the meters should be connected with ____.

82. The part of the shipboard electrical system used to control the

distribution of power to the branch circuits, is the______. 83. Voltage generated by most AC generators is fed from the machine to the

bus by means of ____ . 84. What is the standard method of controlling the output voltage of a 440

volt, 60 Hz, Ac generator? 85. What determines the power factor of an electrical distribution system

being supplied by a single AC generator? 86. How is the voltage output of an AC generator accurately controlled? 87. A molded-case breaker provides protection against short circuits in what

way?


88. Voltage will always lead current in a/an_____. 89. Which of the listed conditions describes the effect on intrinsic

semiconductor operation as a result of a temperature increase? 90. The most inefficient method of voltage reduction, form the standpoint of

power loss, even when placed in series with the load, is the use of a/an______.

91. What is the most inefficient method of voltage reduction from the stand point of power loss?

92. What is the most practical method of controlling the RPM of a step-

speed AC motor? 93. Transformers are used onboard ships with AC generators to ____. 94. The basic “control action” of a magnetic amplifier is dependent upon

_____. 95. The rotation of the main propulsion motor in a modern AC propulsion

drive system is reversed by_____. 96. The purpose of a heat sink, as frequently used with transistors, is

to______. 97. A semiconductor is a material with a_____. 98. Tightly knit metal braid wire can be used with a printed circuit board

when______. 99. What is the method of testing for a reversed shunt field coil in a DC

motor? 100. What is the distinct characteristic of the hydrogen gas that is giving off

from the lead-acide battery during charging? 101. If a transformer is connected to a DC source, the transformer will

overload at the _____.


102. What will happen to the alternator If the energy input is significantly reduced to the prime mover of one ship board alternator operating in parallel with others?

103. Which of the following refers to an electrical device being used to

increase or decrease the voltage in an AC current? 104. As an armature revolves within a magnetic field, friction is developed

between the rotated magnetized particles as they pass though each magnetization cycle. This results in ____.

105. Battery charging rooms should be well ventilated because the charging

process produces ______. 106. When reading electrical motor controller diagrams, it helps to know

that________. 107. Increasing the load on the secondary windings of a transformer will

cause a/an _____. 108. What determines the speed of a squirrel cage induction motor? 109. Basic operating characteristics of the operational amplifier such as gain

and stability are the function of its______. 110. A device that utilizes the principle of electromagnetic induction is

the______ . 111. Amortisseur windings are installed in a synchronous motor to_____. 112. The source of emergency lighting and power at loss of normal ship‟s

power on a cargo vessel should be obtained from the ____. 113. Which of the following physical characteristics does a wound- rotor

induction motor possess that a squirrel cage motor has none? 114. In an induction motor, rotor currents are circulated in the rotor

by________. 115. Two DC drive motors provide input to a single output reduction gear.

Upon relieving an at sea watch you notice that one motor has reduced voltage and zero current compared to the normal voltage and current indicated on the opposite motor. What should you check first?


116. While starting a main propulsion synchronous motor, the ammeter pegs

out at maximum and then returns to the proper value after synchronization. What does this indicate?

117. The main difference between a shunt-wound motor and squirrel-cage

motor is that the shunt-wound motor has _____________ 118. A transformer in an electric circuit serves to ___. 119. Capacitors can be used in electric distribution systems to improve power

factor. This is accomplished by seesawing energy between the capacitor and the ____.

120. Why is it desirable to operate paralleled AC generators at the same

power factor? 121. Which of the substances listed can be used to shield sensitive

equipment from static magnetic fields? 122. Regarding an AC generator connected to the main electrical bus; as the

electric load and power factor vary, a corresponding change is reflected in the generator armature reaction. These changes in armature reaction are compensated by the ________.

123. To limit the current flow through a DC, voltmeter to as low a value as

possible, the moving coil is provided with a/an ____. 124. A low voltage source is being used for testing armature coils. A coil short

circuit will be indicated by a ___________. 125. Why is it necessary that a battery charging rooms should be well

ventilated? 126. If overloading an electric motor becomes necessary in an emergency.

What should you do? 127. In a single motor electrical steering system what supplies the main

steering motor? 128. Local action in a dry-cell, or lead storage battery is the process

whereby__________.


129. An alternator shall be protected from running like a motor because of_______. I. high voltage feed into the bus II. excessive load in bus III. damage to alternator

130. Motorization of an alternator is undesirable because______.

I. it gives additional load on the bus II. it can cause possible damage of alternator III. high voltage pulses are induced in the bus

131. Which of the following losses is/are present in every direct current

generator armature? I. Winding copper loss II. Core eddy current loss III. Magnetic hysteresis loss

132. The 24 volt DC bus on the emergency switchboard is used to supply

power to the ___. I. gyrocompass power failure alarm system II. smoke detection system III. general alarm system

133. Incandescent lamps are classified according to ____.

I. shape of bulb and type of service II. size and style of base III. operating voltage and wattage

134. Brushless generator operates without the use of_____.

I. Ommutators II. Brushes III. slip rings

135. A DC ammeter would normally be connected ______. 136. When measuring AC current flow, you must always connect the meter

___________. 137. When measuring AC current flow, you must always connect the meter

___________. 138. Which of the following statements represents the correct method of

connecting the shunt of an ammeter prior to taking a reading?


139. What should you do to the charging current when a lead-acid battery gassing freely while receiving a normal charge?

140. External shunts are sometimes used with ammeters to _____. 141. To increase the frequency of an operating AC generator, you should

__________. 142. What is a common method used to control the speed of the AC

propulsion motor on a diesel-electric propulsion ship? 143. What keep the line losses in a distribution circuit at minimum? 144. The Wheatstone bridge is a precision measuring instrument utilizing the

principle of changes in ____. 145. In a compound-wound motor, where is a portion of the line current flows

through? 146. A control action which produces a corrective signal relative to the speed

at which the controlled variable is changing is called ___________. 147. How does the speed of a synchronous motor change? 148. Which of the following is the function of an automatic voltage regulators

provided on main switchboards? 149. What will happen if you reverse the DC current flow through an electrical

coil? 150. Power transformers are rated in _____. 151. When the voltage and the current developed in an AC circuit reach their

peak values at the same time, the power factor is considered to be _____.

152. When voltage and current developed in an AC circuit reach their peak

values at the same time, the power factor is ___. 153. An electrical device which prevents action from occurring until all other

required conditions are met is called _______.


154. The main purpose of the auxiliary winding on a split-phase, single- phase motor is to_______ .

155. The heating of conductors as a result of resistance in a distribution

circuit causes a power loss expressed as_______. 156. The operating torque of the disk or timer element in an AC reverse

power relay is obtained from _____. 157. One important difference between wye-connected and delta-connected

generators is that delta connections have ____. 158. The load sharing characteristics of two diesel alternators operating in

parallel are directly related to the setting of their governors‟_____. 159. The greatest detrimental effect on idle electrical equipment, such as

cargo pump motor is the_______. 160. Why is the engine room watch officers should keep a constant check on

the loads carried by electric motors? 161. Which of the listed conditions could cause a recently overhauled DC

motor to have excessively hot winding and sparking at the brushed? 162. Which of the following starting system should be carried out after

overhaul of a motor? 163. What is the common source of field excitation for synchronous motors? 164. An electrical device which employs a stationary armature and a rotating

electromagnetic field is used aboard ship as a_______. 165. What is a component used to protect the DC generator circuits against

malfunctions due to prime mover power loss? 166. Equalization of the power factors of two alternators operating in parallel

is accomplished in what manner? 167. Which of the following electrical instrument is the safest to use in taking

the current even without switching off or opening the circuit? 168. A circuit breaker differs from a fuse, in that a circuit breaker_________.


169. AC circuits possess characteristics of resistance, inductance, and capacitance. The capacitive reactance of a circuit is expressed in_____ .

170. Relative to the secondary winding of a step-up transformer, the primary

winding will have ____. 171. What will happen if connections on a DC shunt motor are changed on

either the field connections, or the armature connections? 172. What is the purpose of DC generator brushes? 173. The frequency output of an operating alternator is controlled by

the______ . . 174. A switchboard for an AC electrical system requires the use of which of

the following devices? 175. A bus disconnect link is used to isolate ___. 176. The purpose of a magnetic relay is to ______. 177. As storage battery for an emergency lighting and power system must

have the capacity to ____. 178. On an engine throttle control system, the auxiliary control circuits are

provided with devices to prevent excessive over travel of the actuating valve by the control motor. What are these devices?

179. What protects a molded-case circuit breaker against sustained

overload? 180. The shunt of a DC ammeter should be connected in _____. 181. When a transformer is used to step-down voltage, the low voltage

winding is ___. 182. What indicates a violent gassing developed by a lead-acid battery during

charging? 183. Which of the following types of motors is often designed for use in

correcting power factor?


184. When the non-essential load has been removed from the feeder system but the service generator remains overloaded, what device automatically activates?

185. What is the function of capacitors which are commonly used on power

supply circuits for engine room automation consoles? 186. What do you call the device where a low input voltage is imparted to it

which then delivers a high output voltage? 187. What electrical component initiates the division of the reactive KVA load

between paralleled AC generators? 188. The circuit power factor of an AC generator operating singularly is

determined by the ____. 189. The purpose of a cage rotor winding placed on the rotor of a

synchronous motor is to ________. 190. What do you call a torque produced by a motor when the shaft will not

turn, even though rated voltage is applied to the stator? 191. What will happen if you reverse the DC current flow through an electrical

coil? 192. Which of the following provides the initial torque to turn a DC generator? 193. A constant output voltage from an AC generator is maintained by

the_________. 194. The division of kilowatt load between two AC generators operating in

parallel is controlled by the settings and characteristics of the ____. 195. On some diesel-electric ships, the DC propulsion motor will only attain

half speed when the generator fields are fully excited. How should the speed above this be obtained?

196. What do you call a DC generator used to supply direct current in order to

maintain an AC generator field? 197. Transformer cores are laminated to reduce ____.


198. To test the feeder system for grounding, the three earth lamps will be activated when this switch is manipulated.

199. A transformer works on the basic principle of ____. 200. What is the simplest method of controlling the terminal voltage of

compound-wound DC generator? 201. Which of the following types of motor has two separate field windings

usually connected in parallel with the armature circuit? 202. Which of the following types of motor whose speed at normal operation

is constant or practically constant? 203. How would you describe a circuit with a blown fuse? 204. Which of the following operating characteristics for DC motors is

considered to give high starting torque? 205. The resistance value of a resistor in a circuit can best be determined by

the ______. 206. What is the recommended practice on the frequency of the incoming

machine prior to closing the breaker when paralleling two AC generators?

207. When two AC generators are being paralleled, the breaker should be

closed with the synchroscope pointer rotating in what direction? 208. What is the characteristic of the mica used in the commutators of DC

machinery? 209. Regarding an induction motor, where is the output power developed

related to? 210. What type of AC single-phase motor will also operate on direct current? 211. What do you call an AC motor which uses rheostat in the motor circuit to

vary the speed? 212. Which of the following is the most common of excitation for synchronous

motor?


213. Which of the listed transformers uses a single winding to produce voltage transformation?

214. What type of electric motor is commonly used to start small auxiliary

diesel engines? 215. Which of the following electric motors would be the most reliable to use

on the open main deck of a vessel? 216. When a megohmmeter is used to test the dielectric strength of wire

insulation, what causes the initial dip of the pointer toward zero? 217. On a modern 13 amp square pin electric plugs, which of the following

statements is true? 218. The timer element of a reverse power relay will activate when ___ 219. The difference between the synchronous speed of a three phase

induction motor and its operating speed is called slip and may be correctly expressed as_______.

220. What determines the cycle per second developed by the alternator

aboard your vessel? 221. Which of the following statements identifies the difference between the

primary windings and the secondary windings of a 2:1 step down transformer?

222. What will happen if there is a change in field excitation of an alternator

operating in parallel? 223. What is the advantage of DC motors over AC motors? 224. A galvanometer is an instrument used to measure ____. 225. Regulations require emergency diesel engine starting systems to have

sufficient capacity to provide power for at least ____. 226. In a three-phase, open-delta connected transformer, the line current is

equal to ____. 227. In a running electric motor, why are we using a sound listening bar?


228. Why is an armature cores in a DC generator made of laminated steel sheets?

229. What will be the next step after closing the circuit breaker to place two

similar alternators in parallel? 230. What is the reason why one of the generator or motor bearings generally

insulated from the end housing? 231. Why is a modern DC generators fitted with commutating poles? 232. Why is there an amortisseur windings installed in a synchronous motor? 233. What is the function of the interpoles installed in DC motors? 234. What is the purpose of squirrel-cage windings in a synchronous motor? 235. When energizing a DC propulsion motor using Local override manual

control, What should the variable resistor do? 236. What is an operating characteristic appearing on the name plates of

shipboard AC motors? 237. When mixing electrolyte, which if the following precautions should

always be observed? 238. If the approximate voltage to be measured in an electric circuit is not

known, you should _____. 239. The basic operating principle of a transformer is attributed to ___. 240. How is kilowatt load divided between two AC generators operating in

parallel? 241. An increase in which of the listed conditions will increase the speed of

synchronous electric motor? 242. Which of the following meters uses a shunt connected in series with the

load, but parallel with the meter movement? 243. The capacity of a storage battery is measured in_______. 244. How is the capacity of a storage battery being measured?


245. A general purpose electrical multimeter can be used to directly measure

____. 246. What is the simplest method of controlling the terminal voltage of

compound-wound DC generator? 247. A „dead front‟ switchboard is one ____. 248. When the feeder system has no ground fault, what does the pointer of

the insulation resistance indicates

guide questionnaires for seafarers · watchkeeping for seafarers, 1978, as amended and...

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