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1. Magnets are installed in the main propulsion turbine lube oil strainers to attract metal particles released through wearing of the __________.

 
 
 
 

2. When testing boiler safeties, those valves not being tested are prevented from lifting by __________.

 
 
 
 

3. If the main turbine bearing lube oil pressure drops to 'zero' and cannot be restored immediately, you should __________.

 
 
 
 

4. To prevent safety valves from lifting when a boiler is being hydrostatically tested, you should __________.

 
 
 
 

5. If you are underway at full speed on a vessel fitted with a main propulsion turbine pressure lubrication system, which of the following actions will be necessary upon complete loss of lube oil pressure?

 
 
 
 

6. Which of the precautions listed should be taken when gagging a boiler safety valve?

 
 
 
 

7. What immediate action should you take if you are on watch and note 'zero' lube oil pressure for the operating main turbine?

 
 
 
 

8. Safety valve gags should only be installed hand tight in order to prevent __________.

 
 
 
 

9. If a lube oil pump fails to build up discharge pressure, the cause could be the __________.

 
 
 
 

10. When using the universal color contrast-type dye penetrant to examine a boiler weldment, any surface defect will appear __________.

 
 
 
 

11. An excessive pressure differential across a lube oil strainer could indicate __________.

 
 
 
 

12. When installing new safety valve escape piping, precautions should include assuring that __________.

 
 
 
 

13. The phenomenon called 'shrink' causes an apparent drop in the water level of a steaming boiler. This phenomenon is caused by a/an __________.

 
 
 
 

14. Fresh water accumulating in the reduction gear sump may be directly attributed to a/an __________.

 
 
 
 

15. Before using a boiler compressed air soot blower system, you should __________.

 
 
 
 

16. The pinion gears used in main propulsion reduction gear mechanisms are generally constructed of __________.

 
 
 
 

17. Which of the listed conditions causes shrinkage in boiler water levels?

 
 
 
 

18. In main propulsion systems, which metal is used in the construction of the shafts for a main reduction gear unit?

 
 
 
 

19. The effects of shrink and swell on boiler water levels can be minimized by __________.

 
 
 
 

20. Why are the gear teeth of large reduction gears usually cut in a temperature controlled room?

 
 
 
 

21. The super heater vents should always be open when __________.

 
 
 
 

22. The scavenging air for soot blowers is supplied by the __________.

 
 
 
 

23. Which of the following represents one of the designed functions of reduction gears?

 
 
 
 

24. In a gravity lube oil system, a sight glass is installed in a line near the operating platform. This line connects the __________.

 
 
 
 

25. A Kingsbury, or pivot shoe type thrust bearing can bear much greater loads per square inch of working surface than can parallel surface bearings because provisions are made in the Kingsbury bearing __________.

 
 
 
 

26. If saltwater leaks into and contaminates the main lubricating oil system, which of the following remedial actions should be taken?

 
 
 
 

27. Which of the following statements represents the principle of operation of the Kingsbury type thrust bearing?

 
 
 
 

28. Which of the following statements represents the function of the center groove machined on a double helical gear?

 
 
 
 

29. As the rate of combustion is increased in a boiler, more steam is generated because the __________.

 
 
 
 

30. By which of the following means can rotating parts of the main reduction gear be examined?

 
 
 
 

31. When raising steam on a boiler, the super heater drains should __________.

 
 
 
 

32. The maintenance of reduction gear units is principally concerned with attention to keeping the _________

 
 
 
 

33. After steam has been raised and a boiler is being placed on the line, the super heater vent can be closed when __________.

 
 
 
 

34. Which immediate action should you take when the temperature of one line shaft bearing increases above its normal operating temperature?

 
 
 
 

35. When a boiler is up to pressure and is being placed on the line, you should secure the __________.

 
 
 
 

36. Sludge tanks are used in an oil lubricating system to receive __________.

 
 
 
 

37. On a boiler equipped with an uncontrolled inter-deck super-heater, reducing the feed water temperature to the steam drum will cause the super-heater outlet temperature to __________.

 
 
 
 

38. A cloudy or milky appearing lube oil sample, taken from the main lubricating oil system could be caused by __________.

 
 
 
 

39. Reduction gears on main propulsion turbines are double helical cut to __________.

 
 
 
 

40. In a disk type lubricating oil centrifuge __________.

 
 
 
 

41. Under otherwise normal steaming conditions, an abnormally high temperature at the super-heater outlet of a single furnace boiler would indicate __________.

 
 
 
 

42. When answering a full astern bell from half ahead, the super-heater outlet temperature on a single furnace boiler will __________.

 
 
 
 

43. Lube oil temperature leaving the lube oil coolers is regulated by throttling the __________.

 
 
 
 

44. In an automatically fired boiler, increasing the temperature of the feed water entering the steam drum will ultimately result in a/an __________.

 
 
 
 

45. The purpose of the main reduction gears is to __________.

 
 
 
 

46. If a tube should leak in an operating main steam turbine lube oil cooler, the water will not immediately contaminate the oil because the __________.

 
 
 
 

47. An air vent is installed on some reduction gear casings to __________.

 
 
 
 

48. During high speed operation of the main turbine propulsion unit, the heat absorbed by the lubricating oil is removed by the __________.

 
 
 
 

49. Which of the following bearings is designed to take loads applied to the axis of the shaft?

 
 
 
 

50. In some lube oil systems, the temperature of the lube oil downstream from the lube oil cooler is directly regulated by __________.

 
 
 
 

51. When the temperature of the main turbine lubricating oil is lowered, an increase will occur in the __________.

 
 
 
 

52. Thrust bearings are installed in main propulsion turbines to __________.

 
 
 
 

53. To test an automatic low lube oil pressure trip on an idling turbo generator and at the same time prevent the chance of bearing damage, you should __________.

 
 
 
 

54. In a steadily steaming boiler, carryover is indicated by a/an __________.

 
 
 
 

55. Which of the following methods provides for axial movement in a gear type flexible coupling?

 
 
 
 

56. The plugging of an excessive number of super-heater tubes will result in __________.

 
 
 
 

57. A rapid fluctuation of the super-heater outlet temperature on a steady steaming boiler could indicate __________.

 
 
 
 

58. At a given pressure, erosion of steam piping and machinery will be minimized by utilizing __________.

 
 
 
 

59. A heavy accumulation of soot on the fireside of the super-heater can cause a __________.

 
 
 
 

60. Which of the listed operational checks should be made continuously on the main propulsion reduction gears?

 
 
 
 

61. After the housing has been bolted down, the final check of reduction gear tooth contact is usually made by __________.

 
 
 
 

62. Boiler super-heaters are designed to __________.

 
 
 
 

63. Excessive thrust bearing wear in a main propulsion turbine rotor should first become apparent by __________.

 
 
 
 

64. Increasing the amount of excess air to a boiler equipped with an uncontrolled inter-deck super heater will cause the steam temperature at the super heater outlet to __________.

 
 
 
 

65. Oil flowing through the sight glass in the line between the lube oil gravity tank and main sump indicates the __________.

 
 
 
 

66. An excessively high super heater temperature could be the result of __________.

 
 
 
 

67. Which of the following conditions is indicated by oil flowing through a lube oil gravity tank overflow bulls eye?

 
 
 
 

68. If a pressure drop does not exist across the super heater in a steaming boiler __________.

 
 
 
 

69. Super heaters of the convection type are heated __________.

 
 
 
 

70. You would not see a flow through the bull's-eye of the lube oil gravity tank overflow line when the __________.

 
 
 
 

71. Which statement is true concerning operational factors affecting the degree of superheat in a single furnace boiler?

 
 
 
 

72. Rapid fluctuation in the super-heater temperature of a steady steaming boiler indicates __________.

 
 
 
 

73. Rapid fluctuation of the super-heater outlet temperature can be caused by __________.

 
 
 
 

74. The purpose of oil deflector rings for turbine shafts include __________.

 
 
 
 

75. The primary purpose of the refractory in a marine boiler is to __________.

 
 
 
 

76. The purpose of the refractory lining of a water-tube boiler furnace is to __________.

 
 
 
 

77. A secondary function of the refractory installed in a marine boiler is to __________.

 
 
 
 

78. The gravity tank in a gravity lube oil system serves to __________.

 
 
 
 

79. As compared with a typical front fired boiler, which of the listed conditions represents an advantage of a top fired boiler?

 
 
 
 

80. On a ship equipped with a gravity type lube oil system, which of the conditions listed will occur first if the main lube oil pump discharge pressure is lost?

 
 
 
 

81. Which of the listed absorbing agents could be used in a boiler during a dry lay up period?

 
 
 
 

82. A water-tube boiler can be laid up either wet or dry. If it is to be laid up wet, you should __________..

 
 
 
 

83. Which of the following conditions is the engineer's first warning that the main lube oil pump has stopped?

 
 
 
 

84. When you are installing a new furnace floor in an oil fired boiler, the clearance between the firebricks should be large enough to __________.

 
 
 
 

85. Oil supply pressure to the main lube oil header of a gravity feed lube oil system is __________.

 
 
 
 

86. To assure a long service life for boiler refractory materials after installation, the most effective method is to __________.

 
 
 
 

87. Magnets located in lube oil strainers serve to __________.

 
 
 
 

88. Which of the listed procedures is the most important factor to take into consideration when making repairs to the refractory surrounding the burner openings?

 
 
 
 

89. A furnace wall in which there are open spaces around the brick as a result of firebrick shrinkage is __________.

 
 
 
 

90. In a pressure type main propulsion turbine lubrication system, the lube oil service pumps normally take suction from the main sump and discharge directly to the __________.

 
 
 
 

91. When drying and baking are impractical, or time is not available, which of the listed materials could be used to repair both burner openings and gas baffles?

 
 
 
 

92. When cleaning the waterside of boiler tubes with a powered rotary brush, the brush should kept in motion to __________.

 
 
 
 

93. Maximum heat transfer rates in a marine boiler can be obtained by __________.

 
 
 
 

94. Water retained in the lube oil system of a main propulsion turbine installation is undesirable because it __________.

 
 
 
 

95. The correct method of expanding a generating tube at the boiler drum tube sheet is to roll __________.

 
 
 
 

96. If the main and standby lube oil service pumps of the main engine fail while underway at sea, __________.

 
 
 
 

97. If lube oil pressure to the main turbines is lost while underway at sea speed, the rotor should be stopped immediately. This is accomplished by __________.

 
 
 
 

98. What is the first thing that will happen if both the main and standby lube oil pumps fail on a geared main propulsion turbine operating at full sea speed?

 
 
 
 

99. Which of the conditions listed could cause an oil flow sight glass of a main turbine bearing to be completely filled with oil?

 
 
 
 

100. Proper lagging of a single-element feed water regulator is accomplished by applying the insulation material __________.

 
 
 
 

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