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Engine · 1,029 questions

Steam Plants - USCG Exam Questions

Boilers, steam turbines, condensate and feed systems, and the operation and maintenance of steam propulsion plants.

Every question below is a real U.S. Coast Guard exam question with four choices. Answer one and the correct choice is revealed instantly, with the USCG reference and illustration where the question uses one.

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All Steam Plants questions

Questions 801–900 of 1,029 · page 9 of 11

  1. #801 The base ring shown in the illustration is identified by the letter __________. Illustration SE-0012 illustration
  2. #802 Which of the statements listed applies to the quill shaft shown in the illustration? Illustration SE-0005 illustration
  3. #803 Which of the following operational practices is helpful in avoiding the accumulation of condensate in the main reduction gear casing?
  4. #804 99. The most practical method of determining the condition of a shaft bearing while the shaft is in operation is to __________.
  5. #805 00. Which of the listed operational checks should be made "continuously" on the main propulsion reduction gears?
  6. #806 Which immediate action should you take when the temperature of one line shaft bearing increases above its normal operating temperature?
  7. #807 The most practical method of determining the condition of a shaft bearing while the shaft is in operation is to __________.
  8. #808 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 w...
  9. #809 If a line shaft bearing begins to overheat, the shaft speed should be reduced. If overheating persists, you should then __________.
  10. #810 While a vessel is underway the low pressure turbine high-speed pinion is damaged. The pinion is then removed from the gear train. Under these circumst...
  11. #811 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 sp...
  12. #812 What is the primary operational difference between a nozzle reaction safety valve and a huddling chamber safety valve?
  13. #813 On a boiler safety valve, the blowdown adjusting ring is locked in place by a __________.
  14. #814 Which of the listed mediums should be used when water washing a boiler?
  15. #815 According to the data given in the illustration, which of the following would be the physical state of the fluid at a gauge vacuum of 25.03 inches Hg,... illustration
  16. #816 In a boiler equipped with an automatic feedwater regulator, erratic variations in the water level could be caused by _________.
  17. #817 The boiler main feed stop check valve is located nearest the __________.
  18. #818 To provide emergency feedwater supply to a steaming boiler, if it becomes necessary to secure the DC heater, suction should be taken on the distilled...
  19. #819 A two-element boiler feedwater regulator is controlled by __________.
  20. #820 The water level in a steaming boiler has risen to within 2 inches from the top of the gauge glass. Your immediate action should be to _________.
  21. #821 The duty engineer reports an alarm on the condensate observation tank oil sensor. Which of the following could be a possible cause?
  22. #822 From which of the areas listed are condensate drains normally collected and returned to the low-pressure drain system?
  23. #823 The viscosity of a residual fuel oil is measured in Saybolt __________.
  24. #824 If the water level in one boiler of a two-boiler plant rapidly falls out of sight, which of the following actions should be carried out FIRST?
  25. #825 In the event of a failure of the pneumatic control system, a multi-element feedwater regulator is designed to operate as a __________.
  26. #826 In accordance with 46 CFR Subchapter F (Marine Engineering), which of the following statements is true concerning the inspection of water-tube boilers...
  27. #827 To prevent damage to the turning gear mechanism, which of the following procedures must be carried out before the turning gear is engaged?
  28. #828 When starting a turbogenerator, you must provide lube oil pressure to the governor power piston by means of __________.
  29. #829 When the flow of oil admitted to a disk-type centrifugal purifier is in excess of its designed capacity, which of the following conditions will usuall...
  30. #830 While underway on a steam ship, the engineer on watch reports a loss of oil flow in the oil head tank bull's eye. Which of the following should be don...
  31. #831 Overheating of the generating tubes will occur when a boiler reaches its end point of __________.
  32. #832 How is boiler water forced to circulate faster in accelerated natural circulation boilers as compared to free natural circulation boilers?
  33. #833 In a boiler water gauge glass, a ball check valve is installed on the __________.
  34. #834 The primary operational difference between a huddling chamber type safety valve and a nozzle reaction type safety valve is the __________.
  35. #835 Arrow "B" shown in the illustration indicates the __________. illustration
  36. #836 Which of the listed refractory materials is capable of providing structural stability?
  37. #837 Which of the following statements represents the primary function of handholes used on a boiler?
  38. #838 The advantage of installing waterwall tubes in a boiler furnace is to __________.
  39. #839 When vapor is in contact with and remains at the same temperature as the boiling liquid from which it was generated, the vapor and liquid are said to...
  40. #840 If a boiler generates saturated steam at 125.3 psig, how much heat is required to change the water into steam if the feed water temperature is 240°F? illustration
  41. #841 The purpose of the boiler drum air cock is to __________.
  42. #842 A boiler internal feed pipe is perforated to __________.
  43. #843 A check valve is located between the economizer and the steam drum to __________.
  44. #844 Scavenging air is supplied to steam sootblower elements to __________.
  45. #845 Boiler fuel savings gained by the use of an economizer can amount to __________.
  46. #846 Why should the fuel oil be recirculated before lighting off a cold boiler?
  47. #847 Many steam plants are designed so that diesel oil can be provided to the burners when __________.
  48. #848 When raising steam on a boiler, the superheater drains should __________.
  49. #849 When raising steam on a cold boiler under normal conditions, you should always __________.
  50. #850 Before blowing tubes in a boiler equipped with steam sootblowers, you should __________.
  51. #851 If there is a sudden drop in the outlet temperature of an uncontrolled superheater, you should __________.
  52. #852 Which of the following items should be checked each time the firing rate or forced draft pressure is adjusted?
  53. #853 When increasing the firing rate of a boiler, which of the following should be carried out FIRST?
  54. #854 Radial cracks have developed in the castable refractory of the burner cones after the first firing since the installation of new furnace front refract...
  55. #855 Which of the following repairs should be made to a badly warped boiler tube?
  56. #856 When installing new safety valve escape piping, precautions should include assuring that __________.
  57. #857 The boiler water gauge glasses should be blown down __________.
  58. #858 When a propulsion boiler is removed from service for an extended period, why should the firesides be thoroughly dried after water washing?
  59. #859 Oil or scale deposits on boiler tube walls will cause __________.
  60. #860 Lower boiler efficiency results from carrying too much excess air because __________.
  61. #861 The boiler feedwater control valve varies the unity relationship between steam and water flow during periods of __________.
  62. #862 With the steam control valve wide open during normal operation, the rate of steam flow from the auxiliary exhaust steam line to the DC heater is actua...
  63. #863 A high-water level in a deaerating feed heater will cause the automatic dump valve to divert condensate to the __________.
  64. #864 During cold ship start-up, you should open the feedwater outlet and condensate valves to a DC heater in order to __________.
  65. #865 If it is necessary to operate a turbine driven main feed pump at shut off head, or at less than 20% of its rated capacity, what will prevent the pump...
  66. #866 While underway on watch in the engine room of a steam vessel, the proper valve positions for controlling feedwater to the boiler using the auxiliary f...
  67. #867 The function of item "E" shown in the illustration is to __________. illustration
  68. #868 The differential temperature of the main condenser cooling water will be significantly affected by a change in __________.
  69. #869 According to the illustrated diagram, what is the correct sequential order of heat exchangers that the main condensate pump pumps condensate through? illustration
  70. #870 Clean low-pressure steam drains are collected in the __________.
  71. #871 Originally steam ship f/o service and settling tanks were designed with only a high suction and a low suction and no other valves. What was the purpos...
  72. #872 Which of the following fuel oil characteristics establishes the danger point when transferring, pumping, and firing procedures are concerned?
  73. #873 A flame scanner installed in modern boiler combustion control systems, functions to __________.
  74. #874 In the majority of marine power plants, the fuel oil heater installations are divided into several units because __________.
  75. #875 The last two digits stamped on a fuel oil atomizer sprayer plate represents the cross-sectional area ratios of the tangential slots and orifice. This...
  76. #876 If one burner of a group of operating steam atomizing burners in a steaming boiler is cut out, the register doors for that burner should be __________...
  77. #877 To obtain the best mixing of air and fuel with a fuel oil atomizer, you need to adjust the __________.
  78. #878 Boiler fuel oil atomizer parts should be cleaned by soaking in 'tip cleaner' or diesel fuel and __________.
  79. #879 8 ounces of oxygen, dissolved in 500,000 pounds of water, is a concentration of __________.
  80. #880 As the pH of the boiler water approaches zero, the water becomes increasingly __________.
  81. #881 Chemicals are added to boiler water to __________.
  82. #882 The major reason dissolved gases are removed from boiler feedwater is because they may cause __________.
  83. #883 Boiler water hardness is increased by __________.
  84. #884 When firing a boiler in local manual control, an increase in boiler load must be accompanied by a/an __________.
  85. #885 In automated boiler operations, a dirty flame scanner will most likely result in __________.
  86. #886 When the flame scanner senses flame failure during boiler operation, which of the listed events will occur FIRST?
  87. #887 Labyrinth seals are used on rotating steam turbine shafts to reduce external leakage. How is this accomplished?
  88. #888 Packing rings installed on auxiliary turbines are generally lubricated by __________.
  89. #889 How is an auxiliary turbine boiler feed pump normally stopped?
  90. #890 A sequential lift, nozzle valve control bar on a turbogenerator, utilizes which of the following operating principles?
  91. #891 What type of bearing is shown in the illustration? illustration
  92. #892 In the thrust bearing assembly illustrated the total oil clearance can be correctly decreased by __________. illustration
  93. #893 The Butterworth heater shown in the illustration receives steam at approximately __________. illustration
  94. #894 Which line in the illustration shown provides live steam to the gland seal regulator? illustration
  95. #895 A contaminated steam generator is used to produce saturated vapor from collected __________.
  96. #896 Which of the following systems can normally be supplied by auxiliary exhaust steam?
  97. #897 Which boiler casualty is considered to be the most serious?
  98. #898 Should it become necessary to abandon a compartment because of the danger of a large steam leak on a boiler, which of the following actions represents...
  99. #899 When setting a propulsion boiler safety valve, in whose presence and satisfaction should this be accomplished?
  100. #900 What may be an indication of white smoke coming from the exhaust of an auxiliary diesel engine?

Steam Plants questions: what to expect

Q How many Steam Plants questions are in the Engine pool?

There are 1,029 Steam Plants questions on this site, every one released by the U.S. Coast Guard or taken from the National Maritime Center's sample examinations, with its correct answer. The exam draws its Steam Plants module from the same pool.

Q What score do I need to pass the Steam Plants module?

Most USCG exam modules, including Steam Plants, require 70 percent to pass. Rules of the Road modules require 90 percent.

Q Are these the real USCG Steam Plants exam questions?

Yes. They are the published U.S. Coast Guard questions, matched to the National Maritime Center's 2026 sample examinations. Answer any question to see the correct choice, the USCG reference and the illustration where the question uses one.

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