Assessment Test


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1. Which of the following methods is used to counter axial thrust in a single flow reaction turbine?

 
 
 
 

2. Corrosion due to electrolytic action in modern water-tube boilers is uncommon because __________.

 
 
 
 

3. Which of the following statements describes those portions of the piping maintained under positive pressure when a pressure-closed feed system is in operation?

 
 
 
 

4. Re-circulation of the feed water ensures a flow of water through the __________.

 
 
 
 

5. Which of the listed components would be considered the dividing line separating the condensate system from the feed water system?

 
 
 
 

6. When heating heavy fuel oil for use in main propulsion boilers aboard ship, the flash point may be exceeded only when __________.

 
 
 
 

7. The primary purpose of the sprayer plate in a mechanical atomizing oil burner is to __________.

 
 
 
 

8. The amount of sodium phosphate in treated boiler water can be measured by a/an __________.

 
 
 
 

9. Which of the following types of main propulsion turbines is most likely to require a dummy piston or cylinder arrangement to counterbalance axial thrust?

 
 
 
 

10. Longitudinal expansion of a boiler water drum is permitted by the __________.

 
 
 
 

11. Which of the components listed prevents water from flowing back into the auxiliary exhaust line if the deaerating feed tank becomes flooded?

 
 
 
 

12. Air removed from the main condenser is vented to the atmosphere through the __________.

 
 
 
 

13. Which of the pumps listed operates at constant speed and delivers water to the deaerating feed tank at a nearly constant pressure?

 
 
 
 

14. Which characteristic of fuel oil is the most significant when determining the temperature to which the fuel oil must be heated for proper atomization?

 
 
 
 

15. The purpose of the relief valve in a fuel oil service system is to __________.

 
 
 
 

16. Condensate pumps have distinctly noticeable characteristics and can usually be recognized by their __________.

 
 
 
 

17. Which of the devices listed is used to keep overheated condensate from flowing to the deaerating feed tank?

 
 
 
 

18. Which of the following statements represents the purpose of boiler sliding feet?

 
 
 
 

19. The net positive suction head of a boiler centrifugal feed pump should be calculated over and above the __________.

 
 
 
 

20. Modern fuel oil temperature control devices are regulated to obtain a desired viscosity rather than a specific fuel oil temperature because __________.

 
 
 
 

21. In the hydraulically operated turbine gland seal regulator, illustrated, the device used as the gland seal pressure sensing unit is called a/an __________.

 
 
 
 

22. A test of boiler water for chloride content indicates the amount of __________.

 
 
 
 

23. The boiler feed water control valve varies the unity relationship between steam and water flow during periods of __________.

 
 
 
 

24. Gland sealing steam is used during steam turbine operation to prevent the loss of __________.

 
 
 
 

25. Low pressure steam is used to keep air from leaking into turbine casing along the turbine shaft. For this purpose, which of the following steam systems is used?

 
 
 
 

26. In a closed feed and condensate system, the drain from the second stage air ejector returns directly to the __________.

 
 
 
 

27. Which of the water supplies listed below is typically used as a cooling medium for the gland exhaust condenser, inter-condenser, and after-condenser of an air ejector unit?

 
 
 
 

28. The viscosity of a residual fuel oil is measured in Saybolt __________.

 
 
 
 

29. Relief valves in the fuel oil service system discharge to either the service pump suction or the __________.

 
 
 
 

30. Testing boiler water for chloride content will indicate the amount of __________.

 
 
 
 

31. If the entire pneumatic control to a multi-element Feed water regulator fails, the feed water valve is controlled by __________.

 
 
 
 

32. One advantage of installing water wall tubes in a boiler furnace is to __________.

 
 
 
 

33. Which statement listed represents a vital function of the main condenser?

 
 
 
 

34. Which of the listed conditions aids in directing gland leak-off steam from the low pressure propulsion turbine to pass through the gland exhaust condenser?

 
 
 
 

35. Heat introduced to the condenser by exhausting steam is removed by the circulation of __________.

 
 
 
 

36. What unit, or factor creates most of the vacuum within a tight and adequately cooled main condenser once the main engine is in operation?

 
 
 
 

37. The primary objective of the auxiliary exhaust system is to supply steam to the __________.

 
 
 
 

38. You should blow down a gage glass periodically to __________.

 
 
 
 

39. Fine adjustments to a boiler combustion control system, to bring about near perfect combustion, should be made by manually adjusting the __________.

 
 
 
 

40. The advantage of installing water wall tubes in a boiler furnace is to __________.

 
 
 
 

41. Steam drum water level indicators must be calibrated to compensate for density differences between the indicated drum water level, and the actual drum water level. If no compensation is made, the indicator will show a __________.

 
 
 
 

42. If a ship with an automated engine room system develops a 'high' boiler water level at half speed, the __________.

 
 
 
 

43. Air removed from the main condenser is vented to the atmosphere through the __________.

 
 
 
 

44. Which of the pumps listed operates at constant speed and delivers water to the deaerating feed tank at a nearly constant pressure?

 
 
 
 

45. Which characteristic of fuel oil is the most significant when determining the temperature to which the fuel oil must be heated for proper atomization?

 
 
 
 

46. Which of the following statements represents the purpose of boiler sliding feet?

 
 
 
 

47. Modern fuel oil temperature control devices are regulated to obtain a desired viscosity rather than a specific fuel oil temperature because __________.

 
 
 
 

48. The main condensate pump in a steam propulsion plant discharges directly to the __________.

 
 
 
 

49. The set point pressure at which the first boiler safety valve is to lift is the __________.

 
 
 
 

50. If a boiler begins to pant and vibrate you should __________.

 
 
 
 

51. Which actions listed should be taken if a boiler is panting?

 
 
 
 

52. If a boiler is panting, which of the following actions should be taken?

 
 
 
 

53. Panting in an oil fired marine boiler can be caused by __________.

 
 
 
 

54. If a steaming boiler is not supplied with sufficient air for proper combustion, the __________.

 
 
 
 

55. If a boiler fire is blown out by a flareback, you should immediately __________.

 
 
 
 

56. If a major flareback occurs to a boiler, which of the following actions should be immediately taken?

 
 
 
 

57. When a boiler flareback occurs, you should __________.

 
 
 
 

58. If while filling the boiler a newly installed gasket on a water-tube hand hole plate weeps, you should __________.

 
 
 
 

59. Which of the listed methods would be most effective when repairing a steam cut on a seating surface of a super-heater hand hole plate?

 
 
 
 

60. An indication of a faulty super-heater soot blower element is a __________.

 
 
 
 

61. If a soot blower element does not revolve freely, the most likely cause would be __________.

 
 
 
 

62. Axial movement in a gear-type flexible coupling is provided for by __________.

 
 
 
 

63. A sectional (sinuous) header boiler is classified as which of the listed boiler types?

 
 
 
 

64. Which of the following fuel oil characteristics establishes the danger point when transferring, pumping, and firing procedures are concerned?

 
 
 
 

65. When condenser tube ends are rolled into both tube sheets, the different rates of material expansion is compensated for by utilizing __________.

 
 
 
 

66. The BTU value of fuel oil is determined by a/an __________.

 
 
 
 

67. The variable capacity pressure atomizing fuel oil burner functions to __________.

 
 
 
 

68. As the pH of the boiler water approaches zero, the water becomes increasingly __________.

 
 
 
 

69. A combustion control system diaphragm type air flow transmitter receives its high pressure signal from the boiler __________.

 
 
 
 

70. Concerning the classification of steam turbines, a cross compound designed unit __________.

 
 
 
 

71. The required number of pounds of steam generated per hour to develop contract shaft horsepower and maintain the specified pressures and temperatures in the plant, when divided by the number of installed boilers, will give the __________.

 
 
 
 

72. Condensate return lines from tank heating coils are led to the __________.

 
 
 
 

73. In which of the listed components is chemical energy converted to thermal energy with regards to boiler operation?

 
 
 
 

74. Coast Guard Regulations (46 CFR) regarding hydrostatic testing of main steam piping state that __________.

 
 
 
 

75. If the water level in a steaming boiler is dropping rapidly and cannot be kept at the normal level by standard practices, you should __________.

 
 
 
 

76. The total heating surface of any steam generating unit is comprised of which of the listed surfaces?

 
 
 
 

77. A combustion control system, diaphragm-type, air volume regulator receives its low pressure signal from the boiler __________.

 
 
 
 

78. In a cross-compound main propulsion unit, the astern turbine is usually installed at the __________.

 
 
 
 

79. The purpose of a “peep” hole in the boiler casing is to __________.

 
 
 
 

80. If a centrifugal main feed pump were operated at shutoff head with the re-circulating line closed, which of the following conditions could occur?

 
 
 
 

81. If a vessel is steaming at a steady rate, and the water level has dropped out of sight in the boiler gage glass, the first corrective action should be to __________.

 
 
 
 

82. Which of the stated pressure conditions identifies the boiler design pressure?

 
 
 
 

83. The process of breaking up fuel oil into fine particles to ensure good combustion is called __________.

 
 
 
 

84. Depending upon the design of the boiler, the constant pressure maintained at the steam drum or the super-heater outlet is known as the __________.

 
 
 
 

85. In the event of a failure of the pneumatic control system, a multi-element feed water regulator is designed to operate as a __________.

 
 
 
 

86. An efficient seal is normally obtained between the upper and lower halves of a turbine casing by __________.

 
 
 
 

87. Which of the listed systems would be a potential source for the high pressure drain system?

 
 
 
 

88. How is boiler water forced to circulate faster in accelerated natural circulation boilers, than in free natural circulation boilers?

 
 
 
 

89. During initial starting of the standby turbine-driven boiler feed pump, which of the listed valves should remain closed?

 
 
 
 

90. The temperature of the fuel oil received during bunkering operations is critical in determining the __________.

 
 
 
 

91. A natural circulation water-tube boiler, with one or more water drums, would be classified as a/an __________.

 
 
 
 

92. The flash point of a residual fuel oil should be used to determine the highest temperature to which the oil may be heated __________.

 
 
 
 

93. In addition to a nozzle, a fuel oil atomizer uses which of the listed parts?

 
 
 
 

94. That portion of the steam drum, containing a manhole for internal access to the drum, for the purpose of cleaning, inspecting, and carrying out repairs, is called the __________.

 
 
 
 

95. Which of the following statements represents the major difference between a boiler drum and a header?

 
 
 
 

96. In a single furnace boiler, where is the steam typically cooled for use as auxiliary steam?

 
 
 
 

97. To prevent pulsations from developing in the boiler Feed water lines, the discharge side of a reciprocating feed pump is equipped with a/an __________.

 
 
 
 

98. When the boiler is operating at high firing rates, in addition to the generating tubes, which of the following tubes will also function as generating tubes?

 
 
 
 

99. The flash point of a residual fuel oil should be used to determine the __________.

 
 
 
 

100. In order for a maximum number of boiler generating and circulating tubes to be installed without weakening the tube sheet, which of the listed procedures should be carried out?

 
 
 
 


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