Assessment Test


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1. Compared to the return flow oil burner system, an internally mixed steam atomizer requires __________.

 
 
 
 

2. Foaming in boiler water is caused by __________.

 
 
 
 

3. What will occur if the level of the atmospheric drain tank (fresh water collector) is permitted to continuously decrease while the vessel is underway?

 
 
 
 

4. In which type of turbine does a pressure drop exist through the fixed blades and the moving blades?

 
 
 
 

5. The purpose of the boiler bottom blow valve is to __________.

 
 
 
 

6. The distilled water tank has been determined to be 75% full. The tank connection to the pneumercator has been disconnected for a maintenance check. If the pneumercator operates correctly, the gage should indicate __________.

 
 
 
 

7. During an in-port watch onboard a tank vessel while cargo operations are in progress and with the jacking gear engaged and running, you notice a 200 gallon drop in the reduction gear lube oil sump level. Which components or conditions should be checked immediately?

 
 
 
 

8. A steam propelled tank ship is operating at sea and despite troubleshooting the system by all the vessel's engineers, the transfer of fuel to the settler has not been possible and the settler will be empty in a few minutes. As the watch engineer, your next step should be to __________.

 
 
 
 

9. In which order should the chemical test analysis of boiler flue gas samples be made?

 
 
 
 

10. Foaming in a boiler can be caused by, except __________.

 
 
 
 

11. Except one of the following, the guarding valve installed in a boiler bottom blow line prevents __________.

 
 
 
 

12. Which steam plant operating condition requires priority attention over the other situations listed?

 
 
 
 

13. A salinity indicator cell is located in the __________.

 
 
 
 

14. A mechanical carbon dioxide recorder operates by detecting the difference between air and the __________.

 
 
 
 

15. Which of the following procedures represents the proper care of unused burners during low load conditions?

 
 
 
 

16. For a gravity type lube oil system, a remote pressure sensing device is installed at the point of highest static head pressure on the main unit to enable the watch engineer to __________. I. be certain that the bearings are being adequately lubricated II. determine if there is sufficient lube oil pressure to the main engine

 
 
 
 

17. Superheated steam is provided to operate the main steam turbine instead of saturated steam due to its __________. I. higher thermal energy per pound II. lesser erosive action on turbine blading

 
 
 
 

18. Before giving a boiler a bottom blow, it should be taken off the line and then the __________.

 
 
 
 

19. How is a diaphragm type steam whistle protected from damage due to entrained condensate?

 
 
 
 

20. An excessive power loss in a straight reaction turbine is commonly caused by __________.

 
 
 
 

21. When is the best time to give a boiler a bottom blow?

 
 
 
 

22. If the salinity indicator located in the main condensate pump discharge piping causes an alarm to sound there is a danger of __________.

 
 
 
 

23. The differential temperature of the main condenser circulating water during normal operation will be affected by __________. I. change in circulating pump speed II. the addition of make up feed

 
 
 
 

24. A boiler has a steam delivery capacity of 100,000 pounds per hour, and is equipped with four steam atomizing burners. If the load range of the burners is 4 to 1, this means that __________.

 
 
 
 

25. Excessive alkalinity of boiler water will cause __________.

 
 
 
 

26. Which of the precautions listed should be taken prior to blowing down a boiler water wall header?

 
 
 
 

27. Which condition would cause an excessively high level in the deaerating feed water tank (Direct Contact) heater during maneuvering?

 
 
 
 

28. In a steam assist fuel oil atomizer, the steam pressure is higher than the oil pressure at __________.

 
 
 
 

29. Babbitt metal is used to make __________.

 
 
 
 

30. A steam supplied heat exchanger will fail to maintain the designed quantity of heated liquid output if the __________. I. steam supply absolute pressure is increased II. tubes are leaking

 
 
 
 

31. If a boiler is being steamed at a high firing rate, blowing down a water wall header without taking any other precaution could result in __________.

 
 
 
 

32. A flue gas air heater, when installed in a boiler, would be accompanied by the operating characteristic(s) of __________. I. higher furnace temperatures than a boiler without an air heater II. greater heat absorption per pound of fuel

 
 
 
 

33. If a ship is to be laid up for an indefinite period, the steam side of the main condenser should be __________.

 
 
 
 

34. The efficiency of boiler combustion can be measured by the relative proportions of certain elements in the flue gases. The elements measured are __________.

 
 
 
 

35. Why should the fuel oil be re-circulated before lighting off a cold boiler?

 
 
 
 

36. The formation of a pit in a boiler tube is most likely to occur when __________.

 
 
 
 

37. Blowing down a water wall header while steaming a boiler at a high firing rate could result in __________.

 
 
 
 

38. Electrolytic corrosion in the condenser circulating water system can be reduced by __________.

 
 
 
 

39. Which condition would cause a dangerously low level in the deaerating feed water tank (Direct Contact) heater during maneuvering?

 
 
 
 

40. Dissolved oxygen entrained in the feed water entering a boiler can cause __________.

 
 
 
 

41. Under what operating conditions may water wall header drains be used for blow down?

 
 
 
 

42. A water-tube type boiler when compared to a fire-tube type boiler has an advantage of __________. I. requiring less chemical compounding II. providing a greater amount of heat transfer to the water as the hot gases pass through the tubes

 
 
 
 

43. Vapor blowing from the air ejector condenser vent may be caused by __________.

 
 
 
 

44. When burning fuel oil in a boiler, a high CO2 content is desired in the stack gas because __________.

 
 
 
 

45. When re-circulating fuel oil prior to cold boiler start-up, which of the listed actions should be carried out?

 
 
 
 

46. Babbitt is a metal alloy commonly used for lining __________.

 
 
 
 

47. Machinery operating features are designed to help conserve energy. Which of the following will not contribute to energy conservation?

 
 
 
 

48. Prior to rolling the main turbines in preparation for getting underway, you should __________.

 
 
 
 

49. Advances in metallurgy and improved methods of boiler tube fabrication has led to lighter tubes with wall thicknesses in the vicinity of 0.1 inches. A characteristic of these thin walled tubes is, except __________.

 
 
 
 

50. A steam supplied heat exchanger will fail to maintain the designed quantity of heated liquid output if the __________. I. steam side shell absolute pressure is decreased II. heat exchanger drain is leaking

 
 
 
 

51. Which condition would cause an excessively high level in the deaerating feed water tank (DC heater)?

 
 
 
 

52. Scale in the air ejector first-stage nozzle could cause a decrease in the __________.

 
 
 
 

53. In a water-tube boiler, waterside scale formation is caused by __________.

 
 
 
 

54. Excessive priming in a propulsion boiler can cause severe damage to the __________. I. integral super-heater II. main steam turbine

 
 
 
 

55. Which of the following problems may not occur from improper main turbine warm-up?

 
 
 
 

56. If it becomes necessary to remove water from a pressurized main boiler, it should be directed __________.

 
 
 
 

57. Which condition would cause a dangerously low level in the deaerating feed water tank (Direct Contact) heater as the vessel is increasing from maneuvering to sea speed?

 
 
 
 

58. Insufficient cooling water circulation through air ejector inter-condensers and after-condensers will cause __________.

 
 
 
 

59. The first and second stage air ejectors used with large sea water cooled steam, surface type condensers are designed to __________. I. establish vacuum II. maintain vacuum

 
 
 
 

60. An explosion or flareback could occur in a boiler if __________.

 
 
 
 

61. Boiler water hardness is increased by __________.

 
 
 
 

62. Turbine throttling losses can best be described as a loss of energy occurring __________.

 
 
 
 

63. Which of the following statements represents the advantage of using a small diameter boiler tube over a larger diameter tube?

 
 
 
 

64. According to Coast Guard Regulations (46 CFR), periodic hydrostatic tests are required to be conducted without exception on all __________.

 
 
 
 

65. If the cooling water flow through the air ejector inter-condensers and after condensers is inadequate, which of the problems listed will occur?

 
 
 
 

66. Before an explosion can occur in a boiler furnace, there must be an accumulation of unburned fuel, sufficient air to form an explosive mixture, and a __________.

 
 
 
 

67. The vent line from the main condenser water boxes was not opened when the waterside was recharged. This would __________. I. lead to a build up of pressure on the tube sheet of greater than 40 psig. II. prevent the design vacuum from being attained under normal operating conditions at sea

 
 
 
 

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

 
 
 
 

69. Which of the following statements about gravity type lube oil systems is correct?

 
 
 
 

70. Why are scale deposits on the inside of boiler tubes most objectionable?

 
 
 
 

71. An excessively high brine level in a flash evaporator can be caused by __________.

 
 
 
 

72. While standing watch in the engine room, you notice a high reading at a salinity cell located in the loop seal between two stages of a flash type evaporator. This would indicate __________.

 
 
 
 

73. A solenoid valve in the boiler fuel oil supply line will close when the __________.

 
 
 
 

74. While standing watch underway at sea, you notice that the brine level in the second effect of a double effect solo shell evaporator is nearly out the top of the sight glass. Which action should be taken initially?

 
 
 
 

75. Which of the following types of packing is commonly used to seal the glands of an auxiliary turbine?

 
 
 
 

76. High temperature at the super-heater outlet would not be caused by __________.

 
 
 
 

77. When relieving the watch in the fire room, you should first check the boiler steam pressure and ___________.

 
 
 
 

78. When relieving the watch in the fire room, you should first check the boiler water level and __________.

 
 
 
 

79. When relieving the watch in the fire room, you should first check the fuel pressure to the boiler and _________.

 
 
 
 

80. The fuel oil meter in the fuel oil service system should be bypassed when __________.

 
 
 
 

81. When relieving the watch in the fire room, you should first check the boiler water level and ___________.

 
 
 
 

82. Prior to relieving the watch at sea, you notice black smoke coming from the stack, except one of the following, what would this indicate?

 
 
 
 

83. When a turbine bearing shows signs of overheating, you should __________.

 
 
 
 

84. Underway on watch in the fire room, the bridge reports black smoke coming from the stack. This would indicate __________.

 
 
 
 

85. While standing watch at sea and steaming full ahead, reducing the boiler forced draft pressure would also have a tendency to incorrect which discrepancy listed ?

 
 
 
 

86. The source of metal particles adhering to the magnets in a lube oil strainer is probably from the __________.

 
 
 
 

87. When standing watch at sea, steaming full ahead, adding make-up feed water would also have a tendency to change the following parameters, except?

 
 
 
 

88. When standing watch at sea, steaming full ahead, adding make-up feed water would also have a tendency to change which of the following parameters?

 
 
 
 

89. If you are notified that one of the turbine bearings is overheated, which of the following actions should you take first as the watch engineer?

 
 
 
 

90. Air leaks through the inner or outer casings of a boiler will __________.

 
 
 
 

91. When standing watch at sea, steaming full ahead, adding large amounts of make-up feed water would also have a tendency to change which of the following parameters?

 
 
 
 

92. Coast Guard Regulations (46 CFR Part 56) require that new fuel oil service piping between pumps and burners be subjected to __________.

 
 
 
 

93. When standing watch at sea, steaming full ahead, adding make-up feed water from reserve feed double bottom tanks would also have a tendency to change which of the following parameters?

 
 
 
 

94. Excessive water in an operating lube oil system can be detected by __________.

 
 
 
 

95. Condensate from fuel oil heating coils return to the __________.

 
 
 
 

96. To provide emergency feed water supply to a steaming boiler and it becomes necessary to secure the DC heater, suction should be taken on the distilled water tank using the __________.

 
 
 
 

97. The bottom blow valve should be used to remove sludge and solids which have settled out of circulation after the boiler __________.

 
 
 
 

98. Which of the listed mediums should be used when water washing a boiler?

 
 
 
 

99. If a boiler is brought on the line with its steam pressure much higher than that of the boiler already on the line, there is danger of __________.

 
 
 
 

100. What percentage of CO2 in a boiler flue gas analysis would indicate perfect combustion?

 
 
 
 


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