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1. What is meant by the term emergency bilge suction?

 
 
 
 

2. Which of the following bilge pumping applications would most likely use a non-automated centrifugal pump under manual supervision?

 
 
 
 

3. What is meant by the term independent bilge suction?

 
 
 
 

4. Which of the following ballasting operations performed in conjunction with off-loading cargo could be accomplished without the use of a ballast pump?

 
 
 
 

5. In a compression type automatic grease cup, the lubricant is forced into the bearing by __________.

 
 
 
 

6. Antifriction bearings can be removed undamaged from a shaft by using an arbor press, or wheel puller with a________.

 
 
 
 

7. When removing roller bearings from a shaft, the force of the puller should be applied to the bearing __________.

 
 
 
 

8. Packing extremely soft grease into a roller bearing will cause __________.

 
 
 
 

9. As the speed of an oil lubricated ball bearing increases, fluid friction, due to churning, generates heat. This condition may be avoided by __________.

 
 
 
 

10. A dented race in an antifriction bearing could be caused by __________.

 
 
 
 

11. Accidental flooding of the engine room bilges through the bilge system is prevented by __________.

 
 
 
 

12. As routine maintenance, the bilge manifold valves are periodically removed and examined. Prior to resecuring the valve bonnets, the valve ________.

 
 
 
 

13. The aft starboard bilge well is clogged, and back flushing has not been successful. The next practical solution would be to ____

 
 
 
 

14. You are unable to pump out the aft starboard engine room bilge well that is fouled, with one foot of water over the top of the bilge well, what action should be carried out?

 
 
 
 

15. If one of the bilge system manifold valves does not properly seat, the __________.

 
 
 
 

16. If an operating bilge pump is developing good vacuum, but is unable to discharge any water, which of the following problems is the most probable cause?

 
 
 
 

17. If a bilge pump is able to develop vacuum, but is unable to sufficiently pump out the bilges, you would check for all of the following EXCEPT __________.

 
 
 
 

18. Where a two-stage air ejector set is used in a two-stage flash evaporator, the first-stage air ejector takes suction from the second stage of the evaporator, and the second stage air ejector __________.

 
 
 
 

19. The brine level in the second-stage of a flash-type evaporator is determined in part by the feed rate, the rate of evaporation in both stages, and the __________.

 
 
 
 

20. In a flash type evaporator, all saltwater headers are vented through individual vent cocks to the _______.

 
 
 
 

21. The second stage feed water temperature and shell absolute pressure in a multistage, flash type, distilling plant is_________.

 
 
 
 

22. The temperature of the steam flow to the saltwater feed heater, in a flash type evaporator can be manipulated by a/an __________.

 
 
 
 

23. A fixed orifice plate is generally installed in the live steam supply to a flash evaporator. One of the functions of this orifice is to control the quantity of the supplied steam. A second function is to __________.

 
 
 
 

24. The final heating of the feed water in a flash type distilling plant is carried out by__________.

 
 
 
 

25. The thickest deposit of scale in a flash evaporator is most likely to occur in the tubes of the __________.

 
 
 
 

26. In a flash evaporator, scale as a result of higher than normal temperatures is most likely to occur in the __________.

 
 
 
 

27. The purpose of chill shocking an evaporator is to __________.

 
 
 
 

28. The floating end of a shell-and-tube type cooler utilizes a packing ring to __________.

 
 
 
 

29. When conducting a hydrostatic test on the distillate cooler shell of a flash type evaporator, liquid appears well inside one of the tubes. In order to correct this, you should __________.

 
 
 
 

30. Scale accumulation on evaporator heat exchange surfaces __________.

 
 
 
 

31. If a higher than normal water level is observed through the inspection port of a flash evaporator, you should suspect __________.

 
 
 
 

32. Carryover in a flash type distilling plant can be a result of __________.

 
 
 
 

33. A high reading at a salinity cell located in the loop seal between two stages of a flash type evaporator would indicate __________.

 
 
 
 

34. The quantity and density of brine discharged from the last effect of a flash type evaporator should be kept at a constant value so as to __________.

 
 
 
 

35. While operating a two-stage flash-type evaporator, designed to operate in sea water of 70°F, the current seawater temperature is 50°F, while the salt water feed temperature is maintained at 170°F. The three-way solenoid valve trips, directing the distillate pump discharge to the bilge. Which of the following conditions is the probable cause for this occurrence?

 
 
 
 

36. While operating a two-stage flash-type evaporator, designed to operate in sea water of 70°F, the current seawater temperature is 50°F, while the salt water feed temperature is maintained at 170°F. The three-way solenoid valve trips, directing the distillate pump discharge to the bilge. Which of the following conditions is the probable cause for this occurrence?

 
 
 
 

37. Which of the listed problems could produce a high absolute pressure within a flash type evaporator?

 
 
 
 

38. When securing a jacket-water heated submerged tube evaporator for an extended period of time, you should __________.

 
 
 
 

39. Which of the following acids is preferable and most commonly used for scale removal from the heating surfaces of the jacket-water heated submerged-tube evaporator?

 
 
 
 

40. In a jacket-water heated submerged tube evaporator, what is the primary factor that determines the rate of scale build-up on the submerged tube bundle?

 
 
 
 

41. Regarding a freshwater generator of the reverse-osmosis type, what statement is true?

 
 
 
 

42. Regarding a reverse-osmosis type freshwater generator using multiple spiral-wound membrane modules, what statement is true?

 
 
 
 

43. For the successful operation of a reverse-osmosis freshwater generator, why is the high pressure pump required to operate in the 750 to 1200 psig range for a discharge pressure?

 
 
 
 

44. Regarding the high-pressure pump of a reverse-osmosis freshwater generator, what statement is true?

 
 
 
 

45. In order for a reverse-osmosis freshwater generator to be able to overcome the osmotic pressure without damaging the spiral-wound membrane modules, the pressure must be controlled. What is the location of the pressure regulator?

 
 
 
 

46. When a reverse-osmosis freshwater generator is shutdown, what must be accomplished?

 
 
 
 

47. What component of a reverse-osmosis freshwater generator could be isolated and replaced with the unit remaining in service?

 
 
 
 

48. For the successful operation of a reverse-osmosis freshwater generator, the setting of the brine back pressure regulator is critical. What statement regarding the set point of this regulator is true?

 
 
 
 

49. What is the BEST indication that the pre-treatment filter (or filters) of a reverse-osmosis freshwater generator must be serviced by cleaning or replacement?

 
 
 
 

50. If a reverse-osmosis freshwater generator has fouled membrane modules, what statement is true?

 
 
 
 

51. What is the BEST indication that the membrane module is damaged and is no longer semi-permeable and allowing the solute to pass through?

 
 
 
 

52. Under what conditions would the pre-treatment capabilities of a reverse-osmosis freshwater generator MOST likely be overloaded, and as a result, these conditions should generally be avoided?

 
 
 
 

53. If a reverse-osmosis freshwater generating unit has a high salinity alarm associated with the freshwater outlet, what should be done?

 
 
 
 

54. A salinity indicator is used to determine the __________.

 
 
 
 

55. A salinity indicating system functions on the basic principle of measuring the __________.

 
 
 
 

56. The instrument always used in conjunction with a salinometer is a __________.

 
 
 
 

57. In a flash-type evaporator, an electrical salinity cell would be installed in the__________.

 
 
 
 

58. Which of the following statements represents the basic principle of operation of an electrical salinity indicator?

 
 
 
 

59. Distilled water from an evaporator may be discharged into a potable water tank__________.

 
 
 
 

60. An automatic solenoid dump valve should be set to trip if the evaporator produces distillate with salt content exceeding _________.

 
 
 
 

61. Which of the following statements describes the proper operation of a three-way solenoid trip/dump valve on a two stage flash-type evaporator?

 
 
 
 

62. A solenoid-operated distillate three-way valve is installed in the discharge line between the distilling plant and the potable water tanks. This valve will trip and dump the distillate discharge if the __________.

 
 
 
 

63. What is used to prevent contamination of a potable water system supplying a plumbing fixture such as a galley sink from a backup of sewage sanitary drains?

 
 
 
 

64. Which of the following desalination plants will always require a sterilizer when providing water to a potable water system?

 
 
 
 

65. On most commercial cargo vessels with a relatively small crew size and few users of the potable water system, how is the potable water system pressure maintained?

 
 
 
 

66. What design feature is used to minimize potable water wastage associated with hot water distribution piping for a potable water system?

 
 
 
 

67. Which of the following speed control devices is used strictly as a safety device to prevent prime mover damage and acts by shutting down the prime mover?

 
 
 
 

68. Which of the following statements is true concerning the application for an isochronous governor?

 
 
 
 

69. Which term represents the ability of a speed control governor to maintain prime mover speed without hunting?

 
 
 
 

70. What is meant by the term

 
 
 
 

71. What is statement is true concerning the term

 
 
 
 

72. On deep-draft ships, what statement is true concerning high and low sea suctions for machinery space sea water cooling systems?

 
 
 
 

73. What provision is made for sea chests for removal of air ingested into the sea chest of a machinery space sea water cooling system?

 
 
 
 

74. As it pertains to the automatic hydraulic brake of a horizontal electro-hydraulic anchor windlass, what statement is true?

 
 
 
 

75. A horizontal electro-mechanical anchor windlass is equipped with two warping heads, two wildcats, two manual brake hand wheels, two clutch control levers, and a multipoint lever- operated pedestal-mounted controller. What statement is true as it pertains to the operation of the windlass clutch control levers?

 
 
 
 

76. A horizontal electro-mechanical anchor windlass is equipped with two warping heads, two wildcats, two manual brake hand wheels, two clutch control levers, and a multipoint lever- operated, pedestal-mounted controller. What statement is true as it pertains to the operation of the manual brake hand wheels?

 
 
 
 

77. In attempting to start the hydraulic pump drive motor of a horizontal electro-hydraulic anchor windlass, what condition would prevent the electric motor from starting?

 
 

78. As it pertains to raising and lowering an anchor with a horizontal electro-hydraulic or electro-mechanical anchor windlass, what statement is true?

 
 
 
 

79. As it pertains to the hoist motion limits associated with an electro-hydraulic cargo- handling pedestal-type deck crane, which statement is true?

 
 
 
 

80. As it pertains to the automatic electric brake of a capstan, what statement is true?

 
 
 
 

81. Concerning a conventional mooring winch, what statement is true?

 
 
 
 

82. As it pertains to the automatic hoist winch brake of an electro-hydraulic cargo-handling pedestal-type deck crane, what statement is true?

 
 
 
 

83. What statement is true concerning the door interlock devices associated with a winding drum or traction drive passenger elevator onboard ship?

 
 
 
 

84. A solenoid direct-acting three-position spring-centered directional control valve is used in a hydraulic system to control a linear actuator. When the remote push button is depressed to extend the actuator it fails to move, even though the pump is in operation. Which of the following statements represents the cause?

 
 
 
 

85. If the pump in a hydraulic system produces a low rumbling noise while in operation, this is a probable indication of __________.

 
 
 
 

86. Increased internal leakage, in addition to poor hydraulic system response, and inadequate lubrication, is the result of __________.

 
 
 
 

87. Cavitation in a hydraulic pump is indicated by noisy pump operation and can be caused by a/an __________.

 
 
 
 

88. New piping and tubing to be installed in a hydraulic system can be safely degreased by using __________.

 
 
 
 

89. How can the chance of contaminating hydraulic fluid be decreased when working on hydraulic systems

 
 
 
 

90. Purging air from a hydraulic system is necessary when __________.

 
 
 
 

91. A hydraulic fluid flow control circuit, controlling linear actuator speed during extension, with the pump operating at system pressure, is known as a __________.

 
 
 
 

92. A bearing using an oiling ring as a means of static oil feed must occasionally be serviced by removing the wear particles, grit, and moisture. How is this accomplished

 
 
 
 

93. On a bearing using an oiling ring as a means of static oil feed, how often should the bottom of the bearing sump be drained of impurities?

 
 
 
 

94. On a bearing using an oiling ring as means of static oil feed, unless adverse conditions would indicate otherwise, how often should the oil be completely changed at a minimum?

 
 
 
 

95. In a forced-feed lubrication system, what statement is true concerning lube oil reservoir/sump residence time?

 
 
 
 

96. Adsorption filters are not commonly used in steam turbine or diesel engine lubricating systems because they __________.

 
 
 
 

97. One of the consequences in continuing to operate a centrifugal bilge pump with the discharge valve closed, is that the __________.

 
 
 
 

98. The emergency bilge suction valve is typically used __________.

 
 
 
 

99. Accidental flooding of the engine room bilges through the bilge system is prevented by______________.

 
 
 
 

100. Under what conditions is it permissible to pump machinery space bilges directly overboard without processing by an oily water separator?

 
 
 
 

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