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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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Questions 601–700 of 1,029 · page 7 of 11

  1. #601 The main reason for having a low suction line on the fuel oil service or settling tanks is to __________.
  2. #602 Which of the following actions should be taken FIRST when water is found in the fuel oil settling tank?
  3. #603 Fuel oil is transferred to the settling tanks for __________.
  4. #604 The relief valve on the discharge side of the fuel oil service pump may discharge directly to the suction side of the pump, or to the __________.
  5. #605 Pumps normally used for fuel oil service are __________.
  6. #606 Valve "H" shown in the illustration, functions to __________. Illustration SG-0009 illustration
  7. #607 The valve located between the fuel oil header and the burner valve is known as the __________.
  8. #608 The primary purpose of the sprayer plate in a mechanical atomizing oil burner is to __________.
  9. #609 The amount of oil atomized by a straight mechanical fuel oil burner depends on the sprayer plate size and the __________.
  10. #610 The illustrated burner atomizer assembly is __________. Illustration SG-0022 illustration
  11. #611 In a steam assist fuel oil atomizer, the steam pressure is higher than the oil pressure at __________.
  12. #612 In most installations, the firing rate of a boiler using steam atomization is indicated by the __________.
  13. #613 In a steam assist atomizer, the fuel oil/steam mix takes place entirely within the __________.
  14. #614 Compared to the return flow oil burner system, an internally mixed steam atomizer requires __________.
  15. #615 Boilers equipped with steam atomizers can operate over a wide load range without cutting burners in and out because __________.
  16. #616 A boiler has a steam delivery capacity of 100,000 pounds per hour, and is equipped with four steam atomizing burners. If the load range of the burners...
  17. #617 According to the illustration, what part number identifies the "air door handle"? Illustration SG-0016 illustration
  18. #618 According to the illustration, what part number identifies the "igniter"? Illustration SG-0016 illustration
  19. #619 In an air register assembly, the majority of air passes through the __________.
  20. #620 According to the illustration, what part number identifies the "diffuser"? Illustration SG-0016 illustration
  21. #621 The purpose of a 'peep' hole in the boiler casing is to __________.
  22. #622 The fins on the tubes of a fin type fuel oil heater are provided to __________.
  23. #623 When warming up a fuel oil service system, you should open the steam supply to the fuel oil heaters __________.
  24. #624 Boiler furnace brickwork can be fractured and broken by thermal shock caused by __________.
  25. #625 Which of the conditions listed can cause the flame of a mechanically atomized burner to be blown away from the burner tip when you are attempting to l...
  26. #626 Fluctuations in the atomizing steam pressure at the burners could be caused by a/an __________.
  27. #627 In a multi-burner firebox, a burner tip with a worn and enlarged orifice will __________.
  28. #628 If the temperature of the fuel oil entering an atomizer is too low, the burner will __________.
  29. #629 A leaky fuel oil heater relief valve could be indicated by an increase in the __________.
  30. #630 Condensate accumulation in the steam side of a fuel oil heater could result in __________.
  31. #631 The rate of fouling on the oil side of a fuel oil heater is inversely related to the __________.
  32. #632 If oil is found in the main fuel oil heater steam drain system, which of the actions listed should be taken first?
  33. #633 A boiler with a water capacity of 10 tons, generates steam at the rate of 30 tons per hour. If the feed water quality is 0.5 ppm, the concentration of...
  34. #634 Testing boiler water for chloride content will indicate the amount of __________.
  35. #635 A sample of boiler water can be chemically tested for alkalinity by initially adding a few drops of phenolphthalein and then slowly titrating the wate...
  36. #636 Phenolphthalein is used as an indicator to test boiler water for __________.
  37. #637 A dissolved oxygen concentration of 8.0 ppm represents __________.
  38. #638 Calcium minerals in boiler water are precipitated out of solution by the use of which of the listed chemicals?
  39. #639 Although accurate tests of boiler water for dissolved oxygen are difficult to obtain on board ship, you can be fairly certain of proper oxygen removal...
  40. #640 When a boiler water test indicates a pH value of 6, you should __________.
  41. #641 To minimize metal corrosion, boiler water is best kept __________.
  42. #642 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 ex...
  43. #643 Carbon dioxide dissolved in boiler water is dangerous in a modern power boiler because the gas __________.
  44. #644 Excessive alkalinity of boiler water will cause ________.
  45. #645 Excessive carbon dioxide formed by improper chemical treatment in the boiler may cause corrosion in the __________.
  46. #646 A malfunction in the DC heater is indicated by __________.
  47. #647 Flame scanners are used with boiler combustion control systems to monitor flame quality and to __________.
  48. #648 The photoelectric cell installed as part of the combustion safety controls of an automatically fired boiler will __________.
  49. #649 Which of the following represents a significant system limitation to be aware of when a burner management system is operated in the 'HAND' mode?
  50. #650 In automatic combustion control systems, increasing or decreasing a loading pressure by a set amount is called __________.
  51. #651 As found in a basic pneumatic automatic combustion control system, the function of a standardizing relay is to __________.
  52. #652 In an automatically fired boiler, the steam pressure regulator controls the supply of fuel oil to the burners by responding to variations in the _____...
  53. #653 Fine adjustments to a boiler combustion control system, to bring about near perfect combustion, should be made by manually adjusting the __________.
  54. #654 If an automatically fired burner ignites, but repeatedly goes out within two seconds, the cause could be a/an __________.
  55. #655 Modern day boiler automation allows bypassing the "flame safeguard" system to permit a burner to have a "trial for ignition" period during burner ligh...
  56. #656 In a boiler automation system, if a burner fuel oil solenoid valve continually trips closed under normal steaming conditions, you should __________.
  57. #657 While your vessel is steaming with one boiler, the automatic combustion control system sensing line for the idle boiler is accidentally opened. How wi...
  58. #658 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 th...
  59. #659 If it should become necessary to abandon a compartment because of the danger of a large steam leak on a boiler, which of the following actions represe...
  60. #660 Which of the precautions listed should be taken when gagging a boiler safety valve?
  61. #661 Which of the listed operating practices is considered as safe, and should be followed when opening and inspecting the waterside of a boiler?
  62. #662 If a major flareback occurs to a boiler, which of the following actions should be immediately taken?
  63. #663 Which of the following actions should be carried out if the boiler water level is falling due to a tube failure?
  64. #664 Which action should be taken if the water level in the boiler gage glass drops out of sight and the burners fail to secure automatically?
  65. #665 Which of the casualties listed is apt to occur immediately after a high water casualty?
  66. #666 While underway, the boiler water level in a steaming boiler begins dropping rapidly and cannot be kept at the normal level by standard practices. The...
  67. #667 Under EMERGENCY operating conditions, the proper valve positions for controlling feed water to the boiler should be the __________.
  68. #668 ) In the event of a failure of the pneumatic control system, a multi-element feed water regulator is designed to operate as a __________.
  69. #669 One boiler of a two boiler plant has ruptured a tube and the water cannot be maintained in sight in the gage glass. After securing the fires, your nex...
  70. #670 When preparing to hydrostatically test water-tube boilers, you should __________.
  71. #671 Which of the following statements is true concerning boiler inspections?
  72. #672 According to 46 CFR Part 61, which of the following statements is true concerning the inspection of water-tube boilers?
  73. #673 Which of the following statements represents the Coast Guard Regulation regarding a boiler installation in which the superheater outlet temperature ex...
  74. #674 Which of the Coast Guard publications listed contain the information regarding allowable repairs to boilers installed on cargo vessels?
  75. #675 According to Coast Guard Regulations (46 CFR), which of the following is classified as a boiler mounting?
  76. #676 Coast Guard Regulations (46 CFR) state that main propulsion water-tube boilers are not required to be fitted with a surface blow off valve if the desi...
  77. #677 Coast Guard Regulations (46 CFR Part 56) permit copper pipe to be used for steam service subjected to a maximum pressure and temperature of __________...
  78. #678 Coast Guard Regulations (46 CFR) regarding hydrostatic testing of main steam piping state that __________.
  79. #679 According to Coast Guard Regulations (46 CFR), which of the following steam piping conditions, subjected to main boiler pressure, is exempted from hyd...
  80. #680 If the maximum steam generating capacity of a boiler is increased Coast Guard Regulations (46 CFR) require that the safety valve's __________.
  81. #681 Coast Guard Regulations, 46 CFR Part 54, require steam safety and relief valves to be provided with a substantial lifting device, capable of lifting t...
  82. #682 Coast Guard Regulations (46 CFR) require that the final setting of boiler safety valves be conducted in presence of the __________.
  83. #683 The MAWP of a boiler is 900 psi and the normal drop across the superheater is 20 psi. If the superheater safety valve is set to lift at 825 psi, the m...
  84. #684 A boiler superheater safety valve is set to lift at 450 psi (3102 kPa). Coast Guard Regulations (46 CFR) require that if there is a pressure drop of 1...
  85. #685 The safety valve nominal size for propulsion boilers and superheaters must be not less than 1 1/2 inches and not more than 4 inches. The term 'nominal...
  86. #686 Coast Guard Regulations (46 CFR) concerning superheater safety valves require that the valve __________.
  87. #687 Coast Guard Regulations (46 CFR) concerning marine boilers, require the installation of a safety valve on the __________.
  88. #688 Coast Guard regulations require that the relieving capacity of boiler safety valves must be checked __________.
  89. #689 Coast Guard Regulations (46 CFR) permit repairs and adjustments to boiler safety valves while installed on a main propulsion boiler and may be made by...
  90. #690 Coast Guard Regulations (46 CFR) require the duplex fuel oil discharge strainers installed in boiler fuel oil service systems to be __________.
  91. #691 Coast Guard Regulations (46 CFR Part 56) require that new fuel oil service piping between pumps and burners be subjected to __________.
  92. #692 Coast Guard Regulations (46 CFR) require that quick-closing valves on a fuel oil service system should be installed as close as is practicable to the...
  93. #693 In accordance with Coast Guard Regulations (46 CFR) all fuel oil service piping in the vicinity of the burners must __________.
  94. #694 Coast Guard Regulations (46 CFR) for boiler fuel oil service systems require __________.
  95. #695 According to Coast Guard Regulations (46 CFR), which of the following is permitted in boiler fuel oil service system discharge piping?
  96. #696 All oil-fired main propulsion burners with automatic safety control systems must automatically close the burner valve when _________.
  97. #697 Coast Guard Regulations (46 CFR) require that the design pressure of an economizer integral with the boiler and connected to the boiler drum without i...
  98. #698 When a boiler economizer is fitted with a valved bypass, Coast Guard Regulations (46 CFR) require which of the following devices to be installed?
  99. #699 According to Coast Guard Regulations (46 CFR), feed water nozzles shall be fitted with sleeves, or have other suitable means employed to reduce the ef...
  100. #700 Journal bearings used with modern turbine rotors are manufactured in two halves in order to __________.

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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