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

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

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_

9. The greatest single cause of electrical failure is

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_

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?

104. In an impressed current cathodic protection system, what is anode

114. Which of the following statements best describes the material known as varnished cambric?

109. Which of the following statements represents the FIRST step in seating new brushes on slip rings?

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

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

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

125. In the circle diagram for induction motor, the diameter of the circle represents

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

111. What indicates the third color band on a resistor?

112. What would indicate ground in a particular phase 3 - phase low voltage distribution system?

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

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

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

122. How will you remove a tubular fuse from a fuse panel with ?.

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

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 ?

35. How should controller contacts be routinely cleaned?

121. How much is the typical resistance of the body from hand to foot when dry?

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

92. Any electric motor can be constructed to be?

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

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

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

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

107. If a delicate component must be soldered into a circuit the component may be protected from the heat of the soldering process by.

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

103. How can you restore the charge of a lead-acid battery?

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

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

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

102. In using the Rheostat, what do you call the circuit of the motor to adjust the speed?

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

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

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

115. What is the first step to properly use a hook-on-type voltammeter in checking current flow?

61. During maintenance of circuit breakers,

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

106. The automatic voltage regulators provide on switch boards has function to

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

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

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

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

116. Upon failure of the normal power supply, the emergency generator is placed on the line by the

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

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

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

120. The insulation resistance of electric equipment and machinery should be tested for lowest normal insulation valves

124. When a lead-acid battery begins gassing freely while receiving a normal charge, what should you do when charging?

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

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

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

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

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

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

118. Which of the listed precautions should be observed before spraying liquid solvent on the insulation of an electric motor?

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

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

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

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

105. Complete maintenance of electrical motors should include periodic checks for machine

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?

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

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

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

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?

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

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?

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?

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?

117. Where a thermal-acting breaker is required to be used in an area of unusually high, low, or constantly fluctuating temperatures, an ambient compensating element must be used. What does this element consist of?

127. Two contributors of electronic console failures are heat and vibration. To combine some of their effect, preventive maintenance procedures should include

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

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

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

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

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

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 ?

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

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

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

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

113. While trouble shooting a circuit in an engine room central control console, a resistor is suspected of being faulty. Which of the following precautions must be observed if an ohm meter is to be use to check its value?

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

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

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

123. Which device that commonly utilizes the principle of electromagnetic induction?

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

8. When changing tubular fuses always use a

126. What is a three-layer bidirectional device used primarily as a trggering device with junctions heavily and equally doped?

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

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