Assessment Test

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1. In a closed feed and water cycle, which of the conditions listed could prevent vacuum from reaching the desired level?

 
 
 
 

2. An incandescent white flame in a boiler firebox would indicate __________.

 
 
 
 

3. The re-circulating valve provided in a straight mechanical boiler fuel oil service system, should be opened when __________.

 
 
 
 

4. An adequate phosphate reserve should be maintained in boiler water to __________.

 
 
 
 

5. Main steam turbine bearings are lined with __________.

 
 
 
 

6. Raising vacuum on a main turbine unit without using the turning gear will result in __________.

 
 
 
 

7. Under normal operating conditions, a drop in the steam temperature at the outlet of an inter-deck super-heater could be caused by a decrease in __________.

 
 
 
 

8. Steam assist fuel atomizers are converted to straight mechanical atomizers in order to __________.

 
 
 
 

9. Phosphates are used in the chemical treatment of boiler water to __________.

 
 
 
 

10. A lube oil sample taken from the main engine lube oil system has a dark yellow opaque color. This is the result of __________.

 
 
 
 

11. Prolonged astern operation of a turbine will cause __________.

 
 
 
 

12. The primary operational difference between a huddling chamber type safety valve and a nozzle reaction type safety valve is the __________.

 
 
 
 

13. Which of the following statements is correct regarding the selection of the proper size ring dam for a tubular type lube oil purifier?

 
 
 
 

14. A lube oil sample is taken from the main engine lube oil system and visually inspected. Which of the following would indicate water contamination?

 
 
 
 

15. When main condenser tubes are rolled into both tube sheets, the effects due to differential expansion rates are minimized by the use of __________.

 
 
 
 

16. Under normal firing rates, which of the conditions listed could result in a low super-heater outlet temperature?

 
 
 
 

17. If an analysis of boiler flue gas determines there is no excess air for combustion, you should expect the nitrogen content of the flue gas to be approximately __________.

 
 
 
 

18. In a disk-type purifier which component is used to separate lube oil into thin layers and create shallow settling distances?

 
 
 
 

19. Boiler water hardness in modern high pressure boilers should be kept as close to “zero” as possible by chemically treating with __________.

 
 
 
 

20. A sudden unexplainable drop has occurred in the outlet temperature of an uncontrolled inter-deck super-heater on a boiler carrying a higher than normal TDS (total dissolved solids) reading. Which of the actions listed is required?

 
 
 
 

21. The purpose of the sentinel valve installed on a turbine casing is to __________.

 
 
 
 

22. What is the primary operational difference between a nozzle reaction safety valve and a huddling chamber safety valve?

 
 
 
 

23. In a disk type lube oil purifier, heavy impurities collect mostly __________.

 
 
 
 

24. The lube oil coolers installed in a gravity lubricating oil system are located between the __________.

 
 
 
 

25. The recommended vacuum should be maintained in the main condenser to __________.

 
 
 
 

26. Which of the fuel atomizers listed has the greatest firing range or turndown ratio?

 
 
 
 

27. In the prevention of moisture carryover from a marine boiler, one important consideration is to __________.

 
 
 
 

28. When excessive static boiler pressure has resulted in the initial lift of the valve disc, a huddling chamber safety valve will continue to lift open as a result of ___________,

 
 
 
 

29. While standing your engine room watch at sea, you notice the D.C. heater level dropping rapidly as indicated by the remote level indicator. Which of the following actions should be taken?

 
 
 
 

30. One of the basic rules applying to the operation of a single-pass main condenser, is that the __________.

 
 
 
 

31. While trying to light off a burner on a semi-automated boiler, you note that the fuel oil solenoid valve at the burner will not stay open. Which of the following conditions could cause this problem?

 
 
 
 

32. A flue gas analysis is performed to determine the __________.

 
 
 
 

33. An advantage of steam atomization compared to mechanical atomization is __________.

 
 
 
 

34. If contaminated lube oil were allowed to settle undisturbed in a tank, into which layers would the contaminants separate?

 
 
 
 

35. The purpose of shroud bands secured to the tips of the turbine blades is to __________.

 
 
 
 

36. In a huddling chamber type safety valve, initial valve opening is caused by static pressure acting on the __________.

 
 
 
 

37. To determine the extent of lube oil system contamination you would __________.

 
 
 
 

38. Which of the following types of bearing lubrication schemes can carry the highest unit loading?

 
 
 
 

39. While making a round of the engine room, the oil in all of the main engine bearing sight glasses appears to be milky. The probable cause is __________.

 
 
 
 

40. Which of the following would cause the dowel or locking lip of a split-type, precision insert, main bearing to shear and allow the bearing to rotate with the journal?

 
 
 
 

41. A chemical based analysis of boiler stack gases is taken to __________.

 
 
 
 

42. If boiler water chemicals are decreasing in one boiler and increasing in the other boiler, while both are steaming at normal rates, a leak probably exists in the __________.

 
 
 
 

43. The most practical method of determining the condition of a shaft bearing while the shaft is in operation is to __________.

 
 
 
 

44. Steam supplied to the main propulsion turbines is __________.

 
 
 
 

45. In a huddling chamber safety valve, the initial valve opening is caused by __________.

 
 
 
 

46. During the routine inspection of an operating centrifugal lube oil purifier, you notice oil discharging through the water discharge port. Which of the following actions should be taken?

 
 
 
 

47. One limiting problem of lube oil filters restricting their use in large lube oil systems is __________.

 
 
 
 

48. A condensate re-circulating line is provided to the main condenser in a closed feed water system to __________.

 
 
 
 

49. In a tubular bowl centrifugal purifier, lube oil is rotated at the same speed as the bowl by the __________.

 
 
 
 

50. Which of the stack emissions listed does not represents a heat loss from the furnace?

 
 
 
 

51. The vessel is currently operating at sea. Despite troubleshooting the system, the engineers of the vessel have been unable to transfer fuel to the settler. As the settler level is becoming dangerously low, they should now __________.

 
 
 
 

52. Which of the steam losses listed would be associated with a multistage impulse turbine rather than a multistage reaction turbine?

 
 
 
 

53. Why is it occasionally necessary to verify the accuracy of the distilled water make-up feed tank level remote indicator?

 
 
 
 

54. While standing your engine room watch at sea, you notice the D.C. heater level is dropping below normal as indicated by the remote level indicator. The boiler drum level is observed to be normal, as is the main condensate pump discharge pressure. Therefore, you should __________.

 
 
 
 

55. While on watch aboard a 900 psi steam vessel, you suddenly hear a loud, piercing, high-pitched noise. Which of the following actions should you take?

 
 
 
 

56. The terms “swell' and “shrink” relate to a change in boiler water level which __________.

 
 
 
 

57. Which of the flue gas components listed contributes to the greatest heat loss in a boiler?

 
 
 
 

58. The inability to maintain proper boiler water alkalinity, phosphate, or pH levels in a steam boiler, indicates a leak in the __________.

 
 
 
 

59. In comparison to a reaction turbine, a steam loss specific to an impulse turbine is known as __________.

 
 
 
 

60. The function of a safety valve on a marine boiler is to prevent the pressure in the boiler from rising above __________.

 
 
 
 

61. The term “swell” relates to a change in boiler water level which __________.

 
 
 
 

62. Slag caused by water in the fuel oil will __________.

 
 
 
 

63. A high carbon monoxide content in the flue gases of a boiler indicates __________.

 
 
 
 

64. In most installations, the firing rate of a boiler using steam atomization is indicated by the __________.

 
 
 
 

65. While your vessel is steaming at a constant rate, the alkalinity in one of the boilers is decreasing steadily without requiring the use of extra makeup feed water. This condition could be caused by a leak in the __________.

 
 
 
 

66. In securing the main turbines, steam to the second stage air ejectors should be left on for a short period of time in order to __________.

 
 
 
 

67. A boiler safety valve must be capable of __________.

 
 
 
 

68. Lube oil cannot be efficiently filtered if its __________.

 
 
 
 

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

 
 
 
 

70. Despite troubleshooting the system, the watch engineer has been unable to transfer fuel to the settler while underway. As the settler level is becoming dangerously low, the engineer should now __________.

 
 
 
 

71. A high percentage of carbon dioxide in boiler flue gases indicates __________.

 
 
 
 

72. A basic comparison can be made between a low pressure evaporator operation and a main condenser with regards to the removal of non-condensable gases. The vacuum drag line for the main condenser is specifically connected in which area?

 
 
 
 

73. The purpose of the pressure control disk installed in the soot blower illustrated is to __________.

 
 
 
 

74. For a period of time immediately after being secured, turbines should be rotated slowly to avoid __________.

 
 
 
 

75. A boiler accumulation test is used to measure the __________.

 
 
 
 

76. The level of the contaminated drain inspection tank continually decreases when steam is admitted to a fuel oil double bottom tank. You can expect __________.

 
 
 
 

77. The best indication that a bearing is being properly lubricated is by the __________.

 
 
 
 

78. If the flue gas oxygen content is too high, you should __________.

 
 
 
 

79. The firing range of a steam assisted fuel atomizer is regulated to cope with changes in the steam demand by varying the __________.

 
 
 
 

80. In a reaction turbine, the fixed blades function to __________.

 
 
 
 

81. Which of the conditions listed will provide “blow down” after the safety valve has lifted?

 
 
 
 

82. In accordance with Coast Guard Regulations (46 CFR), all vessels having oil fired main propulsion boiler(s) must be equipped with __________.

 
 
 
 

83. Which of the following items should be checked each time the firing rate or forced draft pressure is adjusted?

 
 
 
 

84. The amount of fuel oil atomized by a steam atomization burner depends on the atomizing steam pressure, the fuel pressure and the __________.

 
 
 
 

85. Oil accumulation in boiler water would __________.

 
 
 
 

86. As found in a reduction gear drive system, thrust bearings serve to __________.

 
 
 
 

87. Proper bracing and support of the boiler safety valve escape piping is necessary to __________.

 
 
 
 

88. If the steam flow input device to a two-element Feed water regulator valve fails, the regulator operates as a __________.

 
 
 
 

89. Which following condition could occur if the distilled water tank level indicator has been giving an erroneously high reading?

 
 
 
 

90. Efficient boiler operation is indicated when the percentage by volume of carbon dioxide present in combustion gases is between __________.

 
 
 
 

91. In a steam assist atomizer, the fuel oil/steam mix takes place entirely within the __________.

 
 
 
 

92. Foaming and moisture carryover in a boiler can be caused by an __________.

 
 
 
 

93. In a reaction turbine, the axial thrust due to the reactive force on the rotor blading drives the rotor __________.

 
 
 
 

94. Safety valves should be set to lift at or below the maximum working pressure allowed by the __________.

 
 
 
 

95. If the feed water flow sensor of a multi-element feed water regulator fails, the valve will be controlled as a __________.

 
 
 
 

96. The purpose of the air chamber at the discharge side of a steam reciprocating boiler feed pump is to __________.

 
 
 
 

97. Generally, a 12% to 14% content of carbon dioxide in boiler flue gases indicates __________.

 
 
 
 

98. The term “shrink” relates to a change in boiler water level which __________.

 
 
 
 

99. Under otherwise normal operating conditions, a drop in the steam temperature leaving an uncontrolled inter deck-type super-heater could be caused by a/an __________.

 
 
 
 

100. In a tubular-bowl type centrifugal lube oil purifier, any solids separated from the oil are __________.

 
 
 
 


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