1. Moisture accumulating in electric motors and generator windings having a cold insulation resistance greater than 50,000 ohms may be baked out with internal heat. This heat can be developed by_

2. What precaution should be taken with a vessel's impressed current cathodic protection system after a drydocking period during which the hull has been painted?

3. The schematic symbol for an operational amplifier in an analogue circuit is a

4. A three-phase squirrel-cage induction motor will run hot due to

5. A capacitor can be tested using a megohmmeter or an ohmmeter, if the meter is connected to a shorted capacitor, the meter pointer should_

7. A switchboard for an AC electrical system requires the use of which of the following devices?

8. When changing tubular fuses always use a

9. The greatest single cause of electrical failure is

10. What will you do if the generator is exposed to rain or any water?

11. A safety device in an electrical circuit consisting of metal strip that melts when the current exceeds the safe level is called

12. An electric tachometer receives the engine speed signal from?

13. A current at which a magnetic-type overload relay tends to trip maybe decreased by raising the plunger further into the magnetic circuit of the relay. This action will

14. What does the variable resistance placed in the rotor circuit of a wound-rotor induction motor provide?

15. Periodic testing of circuit breaker is necessary to assure that a correct rated and properly installed unit

16. Which of the following materials is recommended for finishing the slip rings after grinding or turning?

17. What kind of device that has two pieces of metal joined together so that when its junction is heated, a voltage is produced?

18. When removing ball or roller bearings from the shaft of a motor, you should use a

19. What do do you call on a periodic testing by a shore side support technician using a special camera which can detect potentially dangerous loose or corroded bus bar and controller connections?

20. When the equivalent circuit diagram of double squirrel-cage induction motor is constructed the two cages can be considered.

21. What motor is fitted with an instantaneous overload relay?

22. If both the "high level and "low level''alarms come on for the same address of a centralized control console, the most likely problem is alan

23. Which of the listed procedures should be carried out to prevent moisture damage to electrical apparatus during extended periods of idleness?

24. A common type of protective covering used on electrical conductors is

25. When a nickel-cadmium battery begins gassing while connected to the battery charging circuit, you should

26. A molded-case breaker provides protection against short circuits by using ?

27. What may happen to the components of a winch master control switch, if the cover gasket becomes deteriorated?

28. What should you use to determine if a stator coil is grounded?

29. The charging of lead-acid storage batteries will always result in ?

30. 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

31. What is a device that changes an input signal of one type into an output signal of a differnt type that is proportional to the original input?

32. What gives the information about the speed of a motor in D. C. Generator, ?

33. To check the three line fuses of three-phase system consisting of a three-phase motor, you must

34. periodic testing of circuit breakersis necessary to assure that a correct rated and properly installed unit

35. How should controller contacts be routinely cleaned?

36. Which of the following safest precautionary measure is to be done prior working on the motor of the cargo winch?

37. Four lamps are connected in parallel in a single circuit. If one of the lamp burns out, the others will

38. Electrical leads and insulation on a motor should be painted with

39. Which of the following physical characteristics does a wound-rotor induction motor possess that a squirrel-cage motor does not?

40. Why should you use a high impedance multimeter when troubleshooting electronic equipment?

41. Air gap readings should be periodically taken for electrical generation equipment. The best tool to use to take these measurement is a

42. Which test on a transformer provides information about the regulation, efficiency and heating under load condition?

43. It is a type of electrical fault that happens when a phase conductor is completely or partially interrupted:

44. The windings of electric generators during short idle periods should be

45. The part of the shipboard electrical system used to control the distribution of power to the branch circuits, is the

46. A temperature instrumentationsystem for an engine room console consistes of a resistance temperature detector(RTD), a measuring bridge circuit, and a meter(or alarm circuit). Which of the following statements is true concerning the measuring bridge circuit?

47. In the event of a power failure during cargo loading operations, which of the following can stop the movement of an electric powered cargo winch?

48. A device which can be used to check the calibration of a circuit breaker is a

49. Before reassembling any machinery, what should you do?

50. Air gap readings should be periodically taken for electrical generation equipment. The best tool to use to take these measurements is a

51. A semiconductor that decreases in resistance with an increase in temperature is known as?.

52. What should be done to protect the rotor of a motor disassembled for maintenance or overhaul?

53. What is a variable-resistance component used as a control device in electrical circuit?

54. What kind of electrical cable that is widely used and is highly resistant to mechanical damage?

55. When trouble shooting electronic equipment, what is the first step to be taken before testing the circuit voltage?

56. The purpose of a main switchboard circuit breaker's reverse-power trip is to

57. Temporary repairs to an open DC propulsion armature coil can be made by

58. When charging lead-acid batteries, you should reduce the charging rate as the battery nears its full charge capacity to

59. When shipboard electrical distribution circuits are connected in parallel, additional parallel circuits will cause the total circuit resistance to

60. What is a device that converts fluid powers into linear mechanical force and motion that consists of a movable piston, connecting rod, and plunger operating in a cylindrical cavity?

61. During maintenance of circuit breakers,

62. What is used in most for starting three-phase induction motors of five (5) horsepower or less ?

63. Periodic testing of circuit breakers is necessary to assure that a correct rated and properly installed unit

64. You are testing the insulation in an AC generator with with a megohmeter. the resistance value of a dry, clean winding will_

65. Which of the following data is required to draw the circle diagram for an induction motor?

66. The removal of paint from electrical equipment such as generators, should be cautiously undertaken because

67. A reversible electric motor with worm gear that is connected to the flywheel to position engine parts is the

68. If a small electric motor is immersed in salt water it should be I. washed in fresh water II. dried in an oven III. blow air until it dries

69. To carry out an insulation resistance test, one terminal of the megohmmeter should be connected to the winding, with the other terminal being connected to the

70. Before working on an electric motor starter panel located on the main deck, what should you do FIRST?

71. A fuse the blows often should be replaced only with a fuse of __.

72. Electrical Insulating rubber gloves should be dielectrically tested every how many months?

73. It is a type of temperature sensor that has the characteristic of being very accurate, linear and has a good long term stability.

74. A self-excited DC generator fails to come up to its normal 440 volts. What could be the probable cause?

75. A common type of protective covering used on electrical conductors is,

76. The air gap provided in induction motors should be checked periodically with a feeler gage to detect an unequal air gap and

77. A temperature instrumentation system for an accomodation reefer room consists of a resistance temperature detector (RTD), a measuring bridge circuit and a meter or alarm circuit. Which of the following is true concering the measuring bridge circuit ?

78. Electrically operated safety devices on auxiliary diesel engines functions to stop the engine by

79. A molded-case circuit breaker provides protection against short circuits by using alan ?

80. The proper way to apply plastic electrical tape to an electric cable splice is to

81. The division of kilowatt load between two paralleled alternators is determined by the ?.

82. What is the result if the solenoid coil burns on a cargo winch with an electrical brake?

83. The air gap provided an induction motor should be checked periodically with a feeler gage to detect

84. Encrusted dirt accumulated inside a motor should be removed with a

85. A temperature instrumentation system to an engine room console consists of a resistance temperature detector (RTD), a measuring bridge circuit , and a meter (or alarm circuit). Which of the following statements is true concerning the measuring bridge circuit?

86. When a replacing a fuse with one of a higher rating than the original, which of the following is true?

87. The purpose of a motor under voltage protection device is to

88. The power scale of circle diagram of an induction motor can be found from

89. What electrical apparatus can test insulating efficiency in an electric installation?

90. When reading electrical motor controller diagrams, it helps to know that

91. What devices is fitted to prevent the generator windings from absorbing moisture while at standstill?

92. Any electric motor can be constructed to be?

93. A common type of protective covering used on electrical conductors is

94. Which of the following statements concerning the maintenance of solid-silver Contacts in relay and auxiliary control circuits is correct?

95. What can you do if the generator is exposed to rain or any water?

96. What is the cause when an alternator failed to produce line voltage?

97. Moisture as a result of condensation occurring inside of the cargo winch master switches, can be reduced by?

98. Regulations require each motor controller to have a wiring diagram located

99. A device which can be used to check the calibration of a circuit breaker is a

100. Which of the following statements concerning analog and digital devices are correct?

101. When a megohmmeter is being used to test insulation resistance, current leakage along the surface of the insulation is indicated by the megohmmeter's pointer ?