Assessment Test


Warning: mysql_connect(): Access denied for user 'lorque_wrdp1'@'localhost' (using password: YES) in /home/tmc2018/lorquelorqueassociates.com/wp-content/plugins/review_on_board/inc/class_lib.php on line 15
NEXT

1. Which of the following statements represents the Coast Guard Regulation regarding a boiler installation in which the super-heater outlet temperature exceeds 850°F?

 
 
 
 

2. All ships with periodically unattended machinery plants shall, in addition to the general alarm required by Coast Guard Regulations (46 CFR), be provided with the following, except a/an __________.

 
 
 
 

3. Why are the condensate drains from the fuel oil heaters and fuel oil tank heating coils returned to the drain inspection tank?

 
 
 
 

4. In accordance with Coast Guard Regulations (46 CFR Part 62) for vessels propelled by steam turbines, the navigation bridge primary control system, except one of the following, must include safety limit controls for ____________.

 
 
 
 

5. In addition to being hazardous to personnel, gas leaks through the boiler casing can also __________.

 
 
 
 

6. Which condition could not cause a low level in the deaerating feed water tank (DC heater) as the vessel is increasing from maneuvering to sea speed?

 
 
 
 

7. In a propulsion boiler, diesel oil is generally supplied to the burners when __________.

 
 
 
 

8. Turbine blade erosion is accelerated by, except __________.

 
 
 
 

9. Which of the Coast Guard publications listed contain the information regarding allowable repairs to boilers installed on cargo vessels?

 
 
 
 

10. Many steam plants are designed so that diesel oil can be provided to the burners when __________.

 
 
 
 

11. Which of the journal bearings listed most easily accommodates the minor turbine shaft misalignment?

 
 
 
 

12. Boiler fuel oil atomizer parts should be cleaned by soaking in “tip cleaner” or diesel fuel and _________.

 
 
 
 

13. In a water tube boiler, circulation is developed by the difference in the __________. I. tube length and various diameters II. densities of the hot and cold water

 
 
 
 

14. The distance piece in a boiler burner register assembly, provides for adjustment of the __________.

 
 
 
 

15. The vent line from the main condenser water boxes was not opened when the waterside was recharged. This would __________. I. lead to vapor binding of the main circulating pump II. contribute to a higher than normal condensate temperature entering

 
 
 
 

16. If the DC heater relief valve lifts frequently, the cause can be excessive __________.

 
 
 
 

17. The purpose of the boiler furnace corbel is to __________. I. protect the water drum from direct flame impingement II. support the furnace wall

 
 
 
 

18. Before giving a boiler a surface blow, you must __________.

 
 
 
 

19. Once a huddling chamber type safety valve has begun to initially open, it will then pop open due to the __________. I. expansion of the steam leaving the nozzle II. forces exerted on the projecting lips

 
 
 
 

20. A sudden increase in boiler water hardness or chloride content could be indicated by the following, except __________.

 
 
 
 

21. Coast Guard Regulations (46 CFR), require main propulsion lube oil systems to be designed to function satisfactorily when the vessel has a permanent __________.

 
 
 
 

22. What is the purpose of the movable air doors in an air register?

 
 
 
 

23. In what classification of steam turbines are the moving blades and the adjacent fixed rows of blades shaped to act as nozzles?

 
 
 
 

24. If the maximum steam generating capacity of a boiler is increased, Coast Guard Regulations (46 CFR) require that the safety valves' __________.

 
 
 
 

25. In an oil fired water-tube boiler, inner casing air leaks can cause __________.

 
 
 
 

26. Foaming in a lube oil system can cause the following, except __________.

 
 
 
 

27. A leaking boiler de-super heater may be indicated by a/an __________. I. gradual, but continual rise in phosphate readings in only one boiler II. inability to maintain normal working pressure in the auxiliary steam system

 
 
 
 

28. Air leaks through the inner or outer casing of a boiler could result in the following, except __________.

 
 
 
 

29. When relieving the watch in the fire room, you should first check the boiler water level and then ____________.

 
 
 
 

30. To properly clean a burner tip, you should use __________.

 
 
 
 

31. Prior to relieving the watch you should first check the fire room status by verifying the fuel oil pressure to the burners and __________.

 
 
 
 

32. When relieving the watch in the fire room, you should first check the __________.

 
 
 
 

33. Which of the conditions listed would indicate water carryover to a turbine?

 
 
 
 

34. De-superheated steam can be found at the __________.

 
 
 
 

35. According to Coast Guard Regulations (46 CFR), the studs and bolts on marine boiler mountings must be removed for examination at least every __________.

 
 
 
 

36. An unusual vibration in the main propulsion turbine unit, accompanied by a rumbling sound in the reduction gear, could be caused by __________.

 
 
 
 

37. Spray attemperators are commonly used to __________.

 
 
 
 

38. During each two and one-half year inspection, which test or examination of a cargo vessel water tube boiler is required by Coast Guard Regulations (46 CFR)?

 
 
 
 

39. To properly remove the burner tip nut from the burner barrel, the barrel should be __________.

 
 
 
 

40. The main propulsion turbine can be damaged by __________.

 
 
 
 

41. The primary purpose of a control desuperheater installed in the steam drum of a boiler is to __________.

 
 
 
 

42. If oil is observed in the steam drains from a fuel oil heater, you should __________.

 
 
 
 

43. The control desuperheater of most boilers functions to control __________.

 
 
 
 

44. A leaky fuel oil heater relief valve could be indicated by an increase in the __________.

 
 
 
 

45. One function of the desuperheater installed in a boiler steam drum is to __________.

 
 
 
 

46. Boyle's law can best be defined as __________.

 
 
 
 

47. What will occur if the fuel oil heater condensate returns are not opened or are partially plugged?

 
 
 
 

48. A common cause of the Babbitt linings cracking in a turbine journal bearing is from __________.

 
 
 
 

49. If the fuel oil temperature flowing to the burners is too low, the __________.

 
 
 
 

50. If the main propulsion turbine begins to vibrate severely while you are increasing speed, you should __________.

 
 
 
 

51. Coast Guard Regulations (46 CFR) require that alarm systems be provided for superheaters whose operating outlet temperature is capable of exceeding __________.

 
 
 
 

52. What causes carbon to adhere to the inside surfaces of a fuel oil heater?

 
 
 
 

53. Vibration in main propulsion turbines could be caused by __________.

 
 
 
 

54. Desuperheated steam from the control desuperheater is returned to the main superheater to control the outlet temperature by the action of __________.

 
 
 
 

55. Scale formation on the waterside of boiler tubes is generally produced by __________.

 
 
 
 

56. Which of the following statements represents an example of a throttling loss in a turbine?

 
 
 
 

57. According to Coast Guard Regulations (46 CFR), what is the maximum time interval for hydrostatically testing boilers on a cargo vessel having water-tube boilers?

 
 
 
 

58. Excessively hot water returning to an atmospheric drain tank indicates __________.

 
 
 
 

59. The most troublesome corrosive substances in boiler water are oxygen and __________.

 
 
 
 

60. Throttling the burner air register of a lit burner could result in __________.

 
 
 
 

61. Failure to remove calcium and magnesium from Feed water before it reaches the boiler can result in tube __________.

 
 
 
 

62. Which of the effects listed describes the changes in the velocity and pressure of the steam as it passes through a nozzle?

 
 
 
 

63. A ruptured boiler tube should be removed by __________. I. splitting the remaining tube sections with a safety ripping chisel II. cutting out most of the tube and then allowing the remaining portion to disintegrate as the boiler is normally fired

 
 
 
 

64. The maximum allowable working pressure of a particular boiler is 1050 psig (7340 kPa). The hydrostatic test pressure to be used during the Coast Guard required quadrennial inspection will be __________.

 
 
 
 

65. Which of the conditions listed may be indicated by the lifting of the DC heater relief valve?

 
 
 
 

66. A set of first and second stage air ejectors are used with a large sea water cooled steam condenser. If the first stage air ejector is not in operation __________. I. vacuum can not be established II. maximum operating vacuum can not be maintained

 
 
 
 

67. Sediment in fuel oil will cause __________.

 
 
 
 

68. The vent line from the main condenser water boxes was not opened when the waterside was recharged. This would __________. I. lead to vapor binding of the main circulating pump II. contribute to a higher than normal condensate temperature entering

 
 
 
 

69. Before giving a boiler a surface blow, you should __________.

 
 
 
 

70. Coast Guard Regulations (46 CFR) require the duplex fuel oil discharge strainers installed in boiler fuel oil service systems to be __________.

 
 
 
 

71. Sediment in fuel oil will cause, except __________.

 
 
 
 

72. Carbon dioxide dissolved in boiler water is dangerous in a modern power boiler because the gas __________.

 
 
 
 

73. A convergent-divergent nozzle functions to __________.

 
 
 
 

74. Before commencing a surface blow, the boiler __________.

 
 
 
 

75. In a boiler equipped with an automatic feed water regulator, erratic variations in the water level could be caused by __________.

 
 
 
 

76. Boiler furnace brickwork can be fractured and broken by thermal shock caused by __________.

 
 
 
 

77. The two most common causes of boiler corrosion attributable to boiler water are dissolved oxygen and __________.

 
 
 
 

78. In addition to causing erosion of turbine blades, slugs of water in the steam supply to a turbine driven pump can result in __________.

 
 
 
 

79. The depth of fuel oil in a double bottom tank is measured through the __________.

 
 
 
 

80. Why are the burner registers closed a few minutes after a boiler has been secured to be cooled?

 
 
 
 

81. In a boiler where the drum water level is automatically controlled, which of the following conditions could cause erratic variations in the water level?

 
 
 
 

82. Sliding contact bearings are classified into two general categories: journal bearings and __________.

 
 
 
 

83. When the rate of heat transfer through tube walls is so reduced that the metal becomes overheated, which of the following conditions will result in the boiler?

 
 
 
 

84. According to Coast Guard Regulations (46 CFR), blow off piping external to a boiler with a maximum allowable working pressure of 600 psig must be capable of withstanding a minimum pressure of __________.

 
 
 
 

85. Saltwater contamination of condensate could occur at which component?

 
 
 
 

86. When you are transferring fuel oil to the settling tanks, precautions to be observed should include __________.

 
 
 
 

87. The main reason for keeping an operating boiler burner register fully open while steaming is to prevent __________.

 
 
 
 

88. In a steaming boiler, most dissolved chlorides tend to concentrate at, or near, the __________.

 
 
 
 

89. In automatic combustion control systems, increasing or decreasing a loading pressure by a set amount is called __________.

 
 
 
 

90. A boiler de-super heater is installed in high pressure boilers to __________. I. maintain flow through the super heater II. raise the steam temperature in the steam drum

 
 
 
 

91. A common gas dissolved in water contributing to the greatest amount of corrosion in a condensate system is __________.

 
 
 
 

92. In a water tube boiler, water-wall tubes are effectively used to __________.I. decrease the amount of refractory material necessary in non-water wall installations II. allow for significant increases in the combustion rates

 
 
 
 

93. Shortly after shutting off the fuel to a boiler which is to be secured, the __________.

 
 
 
 

94. The most critical period of main turbine operation is during cold start-up, rather than hot shutdown because __________.

 
 
 
 

95. Coast Guard Regulations (46 CFR), require main propulsion lube oil systems to be designed to function satisfactorily when the vessel has a permanent __________.

 
 
 
 

96. An accumulation test is performed on the boiler to determine the suitability of the safety valves and the set points __________. I. if the boiler normal operating pressure is permanently reduced II. when the steam generating capacity is increased

 
 
 
 

97. Coast Guard Regulations (46 CFR) require the temperature of the water leaving an oil fired, cast iron, low pressure, hot water heating boiler must not exceed __________.

 
 
 
 

98. Excessive carbon dioxide formed by improper chemical treatment in the boiler, may cause corrosion in the __________.

 
 
 
 

99. The main reason for having a low suction line on the fuel oil service or settling tanks is to __________.

 
 
 
 

100. The first adverse effect resulting from main bearing wear in an impulse turbine is __________.

 
 
 
 


Total Rating:


click here to go to review now