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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 501–600 of 1,029 · page 6 of 11

  1. #501 The boiler shown in the illustration would be classed as __________. MO-0064 illustration
  2. #502 Which of the listed problems will happen when the water level of a fire-tube type auxiliary boiler approaches the crown sheet?
  3. #503 Fusible plugs are installed in fire-tube boilers to __________.
  4. #504 Constant capacity, pressure atomizing, fuel burners designed to meet a wide variation in steaming loads on an auxiliary boiler, are __________.
  5. #505 The primary function of a flame safeguard system, as used on an automatically fired auxiliary boiler, is to prevent __________.
  6. #506 A photoelectric cell installed in an automatically fired auxiliary boiler burner management system __________.
  7. #507 During unsafe firing conditions in a large automatic auxiliary boiler, various control actuators are interlocked with the burner circuit to prevent st...
  8. #508 Which of the listed sequence of events occurs when an automatic auxiliary boiler is prepurged?
  9. #509 The pressuretrol which is installed on an auxiliary boiler senses steam pressure changes and __________.
  10. #510 Which of the following actions takes place in the control circuit of an automatically fired auxiliary boiler when the desired steam pressure is obtain...
  11. #511 Which of the following statements describes how the fuel oil enters the whirling chambers of the sprayer plates used in a auxiliary boiler return flow...
  12. #512 The solenoid valves in the fuel oil supply line to an automatically fired auxiliary boiler, are automatically closed by __________.
  13. #513 A variable capacity, pressure atomizing, fuel oil burner functions to __________.
  14. #514 When the steam pressure drops below a set value on an automatically fired auxiliary boiler, fitted with rotary cup atomizers, the combustion control s...
  15. #515 Control of the fuel oil metering valve in an automatically fired auxiliary boiler is accomplished by a __________.
  16. #516 Which piping system is described in the illustration provided. Illustration SG-0010 illustration
  17. #517 If manual control of the water level in a steaming boiler is required, the proper method of control is with the auxiliary feed __________.
  18. #518 The boiler main feed stop check valve is located nearest the __________.
  19. #519 When operating with the auxiliary feed line, feed water flow is controlled __________.
  20. #520 A boiler feed stop-valve must be mounted __________.
  21. #521 The pressure in the feed water system must exceed boiler steam drum pressure in order to __________.
  22. #522 Which of the following statements is correct regarding the start-up operation of a non-condensing turbine-driven feed pump?
  23. #523 Recirculation of the feed water ensures a flow of water through the __________.
  24. #524 During initial starting of the standby turbine-driven boiler feed pump, which of the listed valves should remain closed?
  25. #525 A turbine-driven centrifugal feed pump used for boiler feed service should normally be stopped by __________.
  26. #526 Why is it necessary to have a relief valve protect the deaerating feed tank from internal pressure?
  27. #527 High pressure steam drains are normally discharged to the __________.
  28. #528 To provide emergency feed water supply to a steaming boiler, if it becomes necessary to secure the DC heater, suction should be taken on the distilled...
  29. #529 The purpose of the steam control valves installed in the auxiliary exhaust line is to __________.
  30. #530 The gland exhaust fan draws steam and non-condensable vapors from the gland exhaust condenser and discharges to the __________.
  31. #531 Deaeration of condensate primarily occurs in what section of the illustration shown. Illustration SG-0010 illustration
  32. #532 Proper lagging of a single-element feed water regulator is accomplished by applying the insulation material __________.
  33. #533 A two-element boiler feed water regulator is controlled by __________.
  34. #534 A pneumatic dual element, main propulsion, boiler feed water regulating system commonly used aboard ship utilizes __________.
  35. #535 A single element boiler feed water regulating system used aboard ship utilizes __________.
  36. #536 Excess free oxygen in the boiler feed water can be the result of __________.
  37. #537 If the DC heater relief valve lifts frequently, the cause can be excessive __________.
  38. #538 Which of the conditions listed may be indicated by the lifting of the DC heater relief valve?
  39. #539 Excessive water loss from the main feed system can be caused by __________.
  40. #540 In a closed feed and water cycle, which of the conditions listed could prevent vacuum from reaching the desired level?
  41. #541 The water level in a steaming boiler has risen to within 2 inches of the top of the top gage glass. Your immediate action should be to __________.
  42. #542 On a steam vessel, if a centrifugal main feed pump were operating at shutoff head with the recirculating line closed, which of the following condition...
  43. #543 Air accumulated in the inter condenser of the air ejector assembly is discharged directly to the __________.
  44. #544 Which statement is true concerning two-stage air ejector assemblies?
  45. #545 Serious tube leaks in the air ejector condenser assembly will cause __________.
  46. #546 Why does air entry into the main condenser reduce the efficiency of the steam cycle?
  47. #547 Which of the devices listed is used to keep overheated condensate from flowing to the deaerating feed tank?
  48. #548 Which statement listed represents a vital function of the main condenser?
  49. #549 The leakage of air into the pump casing by way of the packing gland of a condensate pump, is prevented by __________.
  50. #550 If the main condenser were operating at a vacuum of 28.5"Hg, a condensate discharge temperature of 86°F, a seawater inlet temperature of 72°F, and a s... illustration
  51. #551 Air accumulated in the after condenser of the air ejector unit is discharged directly to the __________.
  52. #552 One of the basic rules applying to the operation of a single-pass main condenser is that the __________.
  53. #553 Maintaining low pressure in a condensing turbine exhaust trunk __________.
  54. #554 The connections labeled "A" in the illustration, are used to __________. SG-0025 illustration
  55. #555 The unit shown in the illustration is used as the __________. SG-0025 illustration
  56. #556 A slight vacuum is maintained in the shell of the first stage heater shown in the illustration. The primary reason for the vacuum is to __________. SG... illustration
  57. #557 The steam separator as used in conjunction with a steam whistle normally drains to which of the listed drain systems?
  58. #558 Which of the following statements represents the function of a turbine gland exhaust condenser?
  59. #559 What type of sensor is normally used with the automatic recirculating valve in the main condensate line?
  60. #560 High pressure and low pressure drain systems are part of the __________.
  61. #561 Which of the components listed prevents water from flowing back into the auxiliary exhaust line if the deaerating feed tank becomes flooded?
  62. #562 Cooling water to the vent condenser in a DC heater is supplied by the _______.
  63. #563 In a main propulsion steam turbine installation, the condensate pump initially discharges to the __________.
  64. #564 The leakage of air into the pump casing by way of the packing gland of a condensate pump, is prevented by __________.
  65. #565 Condensate pumps have distinctly noticeable characteristics and can usually be recognized by their __________.
  66. #566 If a ship is to be laid up for an indefinite period, the steam side of the main condenser should be __________.
  67. #567 Vapor blowing from the air ejector condenser vent may be caused by __________.
  68. #568 Scale in the air ejector first-stage nozzle could cause a decrease in the __________.
  69. #569 If the cooling water flow through the air ejector inter condensers and after condensers is inadequate, which of the problems listed will occur?
  70. #570 Excessively hot water returning to an atmospheric drain tank indicates __________.
  71. #571 Dissolved oxygen in the condensate can result from __________.
  72. #572 Salt water contamination of condensate could occur at which component?
  73. #573 If the salinity indicator periodically registers high salinity in the main hot well, the cause may be __________.
  74. #574 Which of the conditions listed could prevent a centrifugal condensate pump from developing its rated capacity?
  75. #575 Excessive condensate depression can result in __________.
  76. #576 While maneuvering out of port, you answer a stop bell. You notice a lot of steam coming out of the gland exhaust condenser vent, in addition to the ma...
  77. #577 From which of the areas listed are condensate drains normally collected and returned to the low pressure drain system?
  78. #578 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....
  79. #579 Which of the listed systems would be a potential source for the high pressure drain system?
  80. #580 High pressure steam drains are normally discharged to the __________.
  81. #581 The property of a fuel oil which is a measurement of its available energy, is known as its __________.
  82. #582 Which of the significant combustible elements of fuel oil is a major source of boiler corrosion?
  83. #583 The minimum temperature requirements for fuel oil in storage tanks is related to the _________.
  84. #584 The most harmful slag forming compounds found in fuel oils are __________.
  85. #585 Which constituent of fuel oil determines the specific heat?
  86. #586 Which combustible element in fuel oil is considered a significant and major source of air pollution?
  87. #587 The BTU value of fuel oil is determined by a/an __________.
  88. #588 The flash point of a residual fuel oil should be used to determine the highest temperature to which the oil may be heated __________.
  89. #589 When testing boiler flue gas with a chemical absorption apparatus, to obtain accurate results __________.
  90. #590 The absence of carbon monoxide in the flue gas of a boiler indicates __________.
  91. #591 When burning fuel oil in a boiler, a high CO2 content is desired in the stack gas because __________.
  92. #592 A mechanical carbon dioxide recorder operates by detecting the difference between air and the __________.
  93. #593 A flue gas analysis is performed to determine the __________.
  94. #594 Which of the following chemicals is used in an Orsat apparatus to absorb carbon dioxide?
  95. #595 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 appro...
  96. #596 Generally, a 12% to 14% content of carbon dioxide in boiler flue gases indicates __________.
  97. #597 The temperature of the fuel oil received during bunkering operations is critical in determining the __________.
  98. #598 When you are transferring fuel oil to the settling tanks, precautions to be observed should include __________.
  99. #599 When you are transferring fuel oil from one double bottom tank to another, precautions to be observed should include __________.
  100. #600 Which of the pumps listed takes fuel oil suction from the double bottom tanks and discharges it to the settling tanks?

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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