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Engine · 1,128 questions

General Subjects - USCG Exam Questions

General engineering knowledge: watchkeeping, pumps and piping systems, hydraulics, instrumentation, and shipboard maintenance.

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 General Subjects questions

Questions 201–300 of 1,128 · page 3 of 12

  1. #328 Tubing is sized by __________.
  2. #333 The use of a needle valve in a piping system is recommended when requiring __________.
  3. #334 The seat of a butterfly valve will most likely be constructed of __________.
  4. #337 Before making up a flanged joint, you should __________.
  5. #338 A thread chaser is a hand tool that should only be used for __________.
  6. #339 The tool used for cutting external pipe threads is called a pipe __________.
  7. #340 Taps and dies used for threading pipe are __________.
  8. #341 When cutting external threads on a steel pipe with a die, you should __________.
  9. #342 A thread die will be easier to start if the end of the shaft to be threaded is slightly __________.
  10. #344 Before disconnecting a joint in a pipeline, you should __________.
  11. #345 Copper coil tubing is best cut with a __________.
  12. #346 The tool used to prepare copper tubing for the installation of fittings is called a __________.
  13. #347 After cutting a piece of tubing to be flared, you should __________.
  14. #348 Enlarging one tube end so the end of another tube of the same size will fit inside is termed __________.
  15. #351 What color is used to indicate the last shot of anchor chain?
  16. #353 A shot of anchor chain is equal to __________.
  17. #354 A mooring winch should be equipped with mechanical brakes capable of holding __________.
  18. #355 When the hydraulic control lever for a deck winch is placed in the neutral or off position, the spring set brake on the fluid motor drive shaft is ___...
  19. #356 The clutch band of a constant tensioning mooring winch must be set up tight enough to drive the winch drum and should slip only when __________.
  20. #357 If you are given the job of adding hydraulic fluid to a mooring winch, and are not certain as to the type of fluid to use, you should __________.
  21. #358 Winch gears must be maintained in proper alignment to prevent __________.
  22. #360 If a lifeboat winch allows a lifeboat to descend to the water at an excessive speed, you should __________.
  23. #361 The best method of fixing a winch motor bearing of the sealed type that is running hot is to __________.
  24. #365 The hydraulic system of a deck winch has been drained, flushed, and refilled with hydraulic fluid. An erratic knocking noise from the hydraulic motor...
  25. #366 Which problems can occur if the brake band lining of a wildcat brake becomes excessively worn?
  26. #367 Overheating of the hydraulic fluid in an electro-hydraulic anchor windlass can result from a/an __________.
  27. #454 One of the consequences in continuing to operate a centrifugal bilge pump with the discharge valve closed, is that the __________.
  28. #456 The emergency bilge suction valve is typically used __________.
  29. #457 Accidental flooding of the engine room bilges through the bilge system is prevented by __________.
  30. #459 What is meant by the term independent bilge suction?
  31. #460 What is meant by the term emergency bilge suction?
  32. #461 Which of the following bilge pumping applications would most likely use a non-automated centrifugal pump under manual supervision?
  33. #463 Which of the following ballasting operations performed in conjunction with off-loading cargo could be accomplished without the use of a ballast pump?
  34. #464 Which of the following deballasting operations performed in conjunction with loading cargo could be accomplished without the use of a ballast pump?
  35. #467 With regard to ballast system operations associated with a dry cargo ship, what is meant by the term "ballasting"?
  36. #468 With regard to ballast system operations associated with a dry cargo ship, what is meant by the term "deballasting"?
  37. #469 With regards to a ballast system associated with an oil tanker, what is meant by the term "segregated" ballast?
  38. #470 Besides retention of ballast water onboard or use of approved onboard ballast water treatment equipment, what is another acceptable means for a vessel...
  39. #471 What is the primary reason why the ballast water management regulations exist as applicable to vessels equipped with ballast tanks operating in U.S. w...
  40. #472 After coolers are used with air compressors to __________.
  41. #474 If all of the air charge has been lost from a ship service air receiver, the compressor mechanical unloading system will __________.
  42. #475 Over pressurization of an air compressor intercooler is prevented by the __________.
  43. #476 The air charge leaving an intercooler, or after cooler of an air compressor can be expected to be __________.
  44. #480 Which of the following compressors on a motor ship would most likely operate at approximately 100 psig?
  45. #481 If an air compressor is fitted with a hand-off-auto (H-O-A) control station, what statement concerning operation is true?
  46. #482 If the drive belts on an air compressor were squealing during startup, you should __________.
  47. #483 If one drive belt on an air compressor is found to be worn you should __________.
  48. #484 The main bearings of a reciprocating air compressor are tapered roller bearings. When mounted, these bearings are given a 'cold' end clearance to ____...
  49. #485 After disassembly, the safest way to remove carbon deposits from air compressor inlet and discharge valves is to use __________.
  50. #486 How often should the air receivers on a compressed air system be drained of moisture and emulsions?
  51. #487 When checking the oil level on a reciprocating air compressor fitted with a dipstick, under what conditions should the oil level be checked?
  52. #488 As an indication that an air compressor air intake filter needs to be replaced or cleaned, what statement is true?
  53. #489 Which of the following statements represents the proper procedural sequence for adjusting the metering rate of an in-line lubricator as used in a ship...
  54. #490 Which of the following statements represents the proper criteria to decide when to drain a filter/moisture separator as used in a ship's service air s...
  55. #491 In a twin-tower desiccant type air dryer using silica gel as an adsorbing agent, what is the procedure for rejuvenating the tower presently on service...
  56. #492 Excessively low air pressure occurring in the intercooler of a reciprocating air compressor is caused by __________.
  57. #494 Operating a reciprocating air compressor without an air filter will cause __________.
  58. #495 Which of the following problems would be the probable cause for the faulty operation of a reciprocating air compressor suction valve?
  59. #497 Which of the following causes would most likely result in excessively high belt-driven reciprocating air compressor drive motor running current draw?
  60. #498 If a reciprocating air compressor was operating at a compression ratio that exceeded its design parameters, what would be the effect?
  61. #499 If a belt-driven reciprocating air compressor is operating at a lower than design displacement capacity (in cubic feet per minute), which of the follo...
  62. #500 If a reciprocating air compressor has cylinder suction or discharge valves that fail to properly seat, what statement is true concerning the result?
  63. #501 What statement is true concerning carbon deposit formation on reciprocating compressor cylinder valves?
  64. #503 As shown in figure "B" of the illustrated block diagram of a central operating system configured for supervisory control, which statement is true conc... illustration
  65. #514 As shown in the illustrated block diagram for a distributed automation system, what statement is true concerning the units labeled "ROS" which are rem... illustration
  66. #515 What type of temperature transmitter would be most suitable for measuring running gear bearing temperatures in a diesel engine in that it requires no...
  67. #516 What type of temperature transmitter would be most suitable for measuring diesel engine exhaust and boiler stack temperatures and generates its own el...
  68. #517 What is another name for the control mode used in a process control system that uses two-point control?
  69. #518 In a closed-loop process control system, what term is used to describe the action of measuring the difference between the actual result and the desire...
  70. #519 In a closed-loop process control system, what statement concerning feedback is true as it relates to stability and the direction of error displacement...
  71. #520 In a closed-loop process control system featuring negative feedback, what is the function of the error detector within the controller?
  72. #521 What type of primary element for a pressure transmitter would be most suitable for measuring oil-fired boiler furnace and forced-draft pressures?
  73. #522 Which of the following rotational shaft speed sensors produces a digital signal?
  74. #524 Concerning the start-up of plain bearings utilizing the three modes of hydrodynamic lubrication, what is the correct sequence of modes from start-up t...
  75. #525 Which of the following bearing types would be an example of a rolling-element bearing which substitutes fluid friction for rolling contact friction?
  76. #529 A dented race in an antifriction bearing could be caused by __________.
  77. #530 In a compression type automatic grease cup, the lubricant is forced into the bearing by __________.
  78. #533 A roller bearing should normally be filled to what fraction of its space cavity?
  79. #534 A ball or roller bearing has an interference fit with the shaft upon which it is being installed with a hydraulic or arbor press. Upon what surface sh...
  80. #535 A ball or roller bearing has an interference fit with the housing in which it is being installed with a hydraulic or arbor press. Upon what surface sh...
  81. #536 A roller bearing has an interference fit with the shaft upon which it is being installed. What thermal method of mounting the bearing would be most ap...
  82. #537 Rolling element bearings may experience fatigue failure after a length of service. What is the first evidence of the beginnings of fatigue failure?
  83. #538 What is the primary indication of a grease lubricated bearing that is over-lubricated in terms of the quantity of grease in the housing?
  84. #539 Which of the following statements concerning antifriction bearings installed on pumps is true?
  85. #548 If the distilling plant first stage absolute pressure is higher than normal, while the second stage absolute pressure remains satisfactory, the probab...
  86. #550 Scale formation in a flash-type evaporator is usually found in the __________.
  87. #552 Small droplets of water entrained in the flashed vapor produced in a flash-type evaporator are removed by the __________.
  88. #555 The brine level in the second-stage of a flash-type evaporator is determined in part by the feed rate, the rate of evaporation in both stages, and the...
  89. #572 Which of the tools listed must be used when retightening the plate type heat exchangers used in the device shown in the illustration? Illustration MO-... illustration
  90. #581 While circulating heated sulfuric acid through a feed water heater of a flash evaporator for the purposes of scale removal, what would be the indicati...
  91. #582 When should mechanical cleaning of feed water heater tubes be accomplished?
  92. #583 What procedure can be used to reduce the rate of scale formation on the heating surfaces of a flash evaporator while still maintaining the desired rat...
  93. #584 While circulating heated sulfuric acid through a feed water heater of a flash evaporator for the purposes of scale removal, what would be the indicati...
  94. #590 What is used to prevent contamination of a potable water system supplying a plumbing fixture such as a galley sink from a backup of sewage sanitary dr...
  95. #591 What type of disinfection system has the disadvantage that it would fail to provide residual disinfectant in the potable water?
  96. #592 Which of the following desalination plants will always require a sterilizer when providing water to a potable water system?
  97. #593 Which of the following statements concerning the arrangements of a potable water system is true?
  98. #594 On most commercial cargo vessels with a relatively small crew size and few users of the potable water system, how is the potable water system pressure...
  99. #595 What is the primary purpose of the lead-lag arrangement of the two potable water pumps supporting a typical potable water system?
  100. #596 What design feature is used to minimize potable water wastage associated with hot water distribution piping for a potable water system?

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The Engine pool holds the current U.S. Coast Guard questions for engineering credentials, from QMED ratings through DDE and Assistant Engineer up to Chief. Answer any question to see the correct choice instantly.