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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 901–1,000 of 1,029 · page 10 of 11

  1. #901 At what piston position should you set the valve clearance on a four-stroke auxiliary diesel engine?
  2. #902 In which four stroke diesel engine system are sacrificial zinc anodes most commonly found?
  3. #903 When you hear an exhaust gas turbine of an auxiliary diesel engine surge it sounds like it is "barking." What is the likely cause of a turbine "barkin...
  4. #904 If an auxiliary diesel engine is overheating at a steady load, what should be the first thing that you suspect?
  5. #905 If an auxiliary diesel engine starts firing but does not come up to normal speed, without load or under a small load, one cause may be __________.
  6. #906 One factor for determining the minimum feedwater inlet temperature to a boiler economizer is the __________.
  7. #907 The boiler economizer provides additional heat to the __________.
  8. #908 What must you do before placing the jacking gear in operation on a main turbine unit?
  9. #909 After restoring the normal water level in a boiler following a high-water casualty, you should __________.
  10. #910 What should you do when a turbine bearing shows signs of overheating?
  11. #911 What would be the FIRST indicator of excessive thrust bearing wear in a main propulsion turbine rotor?
  12. #912 Which of the listed conditions can cause high superheater outlet steam temperature in an automated boiler?
  13. #913 In a boiler equipped with a convection type superheater, the superheater tubes are located __________.
  14. #914 Which color burner flame would indicate too much excess air?
  15. #915 You are standing watch in the engine room of a steam vessel. You should blow down a gauge glass periodically to __________.
  16. #916 The MOST common cause of heat blisters developing on boiler generating tubes is due to __________.
  17. #917 The superheater vents should always be open when __________.
  18. #918 To prevent a small plastic refractory wall patch repair from falling into the furnace of a D-type boiler, you should __________.
  19. #919 As the percentage of CO2 in the stack gas decreases, you can assume that __________.
  20. #920 In the absence of the manufacturer's instructions, a good procedure in reassembling a high-pressure boiler gauge glass is to tighten the nuts in pairs...
  21. #921 Where is the "dry pipe" located in a boiler?
  22. #922 The purpose of the mica used in a boiler water gauge glass assembly is to prevent __________.
  23. #923 When preparing to cut a boiler in on the line, you determine that the steam pressure of the incoming boiler is about 5 psig above line pressure. Which...
  24. #924 A higher-than-normal stack gas temperature could indicate __________.
  25. #925 A boiler safety valve must be capable of __________.
  26. #926 If the flue gas oxygen content is too high, you should __________.
  27. #927 A triple element, main propulsion, boiler feedwater regulating system commonly used aboard ship utilizes __________.
  28. #928 The two-element feedwater regulator functions similarly to the three-element feedwater regulator but does not utilize __________.
  29. #929 Which statement listed represents a vital function of the main condenser?
  30. #930 The loop seal connected to the main condenser returns the drains from the __________.
  31. #931 The illustrated burner atomizer assembly is __________. illustration
  32. #932 Fuel oil solenoid valves at the burner fronts should be of the manual reset type to __________.
  33. #933 The original bridge gauge reading for a reduction gear bearing was measured as 0.008 inches. A year later, the bridge gauge reading for the same beari...
  34. #934 When securing a main propulsion turbine equipped with carbon packing glands, the vacuum should always be broken before securing the gland seal steam b...
  35. #935 The astern element of a main propulsion turbine is usually designed as a __________.
  36. #936 According to the illustration, what actuates the bellows "I" in the gland seal regulator? illustration
  37. #937 Auxiliary steam at full operating pressure is supplied from the boiler directly to the __________.
  38. #938 The bottom blow valve on a water-tube boiler is usually attached to the __________.
  39. #939 In a coil-type forced circulation water-tube boiler, __________.
  40. #940 A boiler pressuretrol senses steam pressure changes and __________.
  41. #941 A photoelectric cell installed in a boiler burner management system __________.
  42. #942 Bi-color water level indicators, connected directly to the boiler drum, operate on the principle of __________.
  43. #943 The useful life of furnace refractory is affected most by __________.
  44. #944 A corbel is used in a boiler furnace to __________.
  45. #945 Which of the following is the best reason for opening the air cock when draining a water-tube boiler?
  46. #946 Before using a boiler compressed air soot blower system, you should __________.
  47. #947 A hole should be made in the sagged tube occurring in a water-tube boiler, prior to plugging the tube to prevent a __________.
  48. #948 If while filling the boiler a newly installed gasket on a water-tube hand-hole plate weeps, you should __________.
  49. #949 To make temporary emergency repairs to brickwork in a boiler furnace, which of the materials listed should be used?
  50. #950 Which procedure should be followed to dry out the fireside of a boiler after water washing?
  51. #951 Steam drum water level indicators must be calibrated to compensate for density differences between the indicated drum water level, and the actual drum...
  52. #952 Treatment of boiler feedwater for the control of hardness is necessary to prevent __________.
  53. #953 Normally a boiler water sample should be taken __________.
  54. #954 An adequate phosphate reserve should be maintained in boiler water to __________.
  55. #955 Which of the significant combustible elements of fuel oil is a major source of boiler corrosion?
  56. #956 In terms of the completeness of combustion, in viewing the flame through the peephole, what would be the indication of the MOST complete combustion?
  57. #957 When operating with the auxiliary feed line, feed water flow is controlled __________.
  58. #958 Waterboxes on condensers are vented to __________.
  59. #959 Because of the pressure drop existing across each diaphragm, the flow of steam between the nozzle diaphragm and the rotor of the turbine is held to a...
  60. #960 Why would superheated steam be used in a propulsion turbine instead of saturated steam?
  61. #961 When monitoring a steam propulsion plant lubricating oil pressure, what pressure is the most critical to check regularly while underway?
  62. #962 In the event of a failure of the pneumatic control system, a multi-element feed water regulator is designed to operate as a __________.
  63. #963 The Fairbanks Morse part labeled "G", as shown in the illustration, is a __________. illustration
  64. #964 All of the diesel engine cylinder firing pressures are normal, yet all of the exhaust temperatures are low. Which of the following situations is respo...
  65. #965 Excessive vibration in an operating diesel generator may be caused by __________.
  66. #966 Steam tables can be used to obtain the __________.
  67. #967 What statement concerning the operation of a propulsion steam turbine turning (jacking) gear is true?
  68. #968 Allowance for axial expansion of a steam turbine due to temperature changes is provided for by the use of __________.
  69. #969 When monitoring steam propulsion plant lubricating oil temperatures while underway, what represents the temperature rise across an individual bearing?
  70. #970 The best conductor of heat in a marine boiler is __________.
  71. #971 Bottom blow valves are installed on water-tube boilers to __________.
  72. #972 During unsafe firing conditions in a boiler, various control actuators are interlocked with the burner circuit to prevent start-up, in addition to saf...
  73. #973 The correct method of expanding a generating tube at the boiler drum tube sheet is to roll __________.
  74. #974 According to the temperature/enthalpy diagram for water at atmospheric pressure, if the substance is undergoing a heat gain, what heat transfer proces... illustration
  75. #975 According to the illustrated main and auxiliary diesel engine cooling water systems diagram, which of the following heat exchangers uses high temperat... illustration
  76. #976 The best indication that a bearing is being properly lubricated is by the __________.
  77. #977 According to the illustrated diesel engine cooling water systems diagram, what fluid is the low temperature central freshwater thermostat designed to... illustration
  78. #978 Fuel piping should be regularly inspected for leaks. What leak location would be particularly troublesome in terms of presenting a fire hazard?
  79. #979 In terms of the completeness of combustion, in performing a stack gas analysis on an operating boiler, what would be the indication of the LEAST compl...
  80. #980 In an auxiliary diesel engine "bypass type" lubricating oil system, the main lube oil pump forces __________.
  81. #981 Under EMERGENCY operating conditions with the main feed valve malfunctioning, what should be the proper valve positions for controlling feedwater to t...
  82. #982 What is a quick and effective way of determining whether or not a boiler water gauge glass is operating properly?
  83. #983 What type of clutch is pictured in the illustration? illustration
  84. #984 In order for microbiological growths to thrive in a fuel tank it is necessary for __________.
  85. #985 What does gland sealing steam prevent the loss of during steam turbine operation?
  86. #986 Which of the following could be the cause of leaking valves in an air compressor?
  87. #987 Which of the following is the purpose of the steam drum in a D-Type marine boiler?
  88. #988 As shown in the illustrated D type single furnace boiler, what does item "E" represent? illustration
  89. #989 While fires are lit in a boiler, in terms of uptake dampers and air register doors, what conditions must be met?
  90. #990 On a diesel engine working on the four-stroke operating cycle, what engine feature ensures proper scavenging?
  91. #991 According to the illustrated lubricating oil system diagram, which of the labeled items is the lube oil storage tank? illustration
  92. #992 Which of the following represents the motivating power fluid used in conjunction with the ejector pumps on plate type evaporators?
  93. #993 The process of scavenging a two-stroke cycle diesel engine serves to __________.
  94. #994 What type of diesel engine starting motor is pictured in the illustration? illustration
  95. #995 Zincs are installed in the main and auxiliary condenser waterboxes to __________.
  96. #996 Some diesel engines are supercharged with a __________.
  97. #997 Which of the following statements correctly describes the construction of the close coupled sanitary pump shown in the illustration? illustration
  98. #998 After which of the following is the air cock to be closed when raising steam on a cold boiler?
  99. #999 Which of the following labeled items of the illustrated section of boiler refractory represents the insulating block? illustration
  100. #1000 Which of the below engines might power a large merchant vessel with a direct drive controllable pitch propeller?

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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