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Engine · 1,465 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 1,401–1,465 of 1,465 · page 15 of 15

  1. #2626 Of the individual components of a pre-fire planning package, which component when used with stability charts would be particularly useful in decision-...
  2. #2627 As a first assistant or chief engineer, what is the source of your authority?
  3. #2628 Which of the following condition-based maintenance data continuous monitoring techniques has the greatest value in predicting wear?
  4. #2629 In a refrigeration system featuring low-side pumpdown prior to the automatic shut down of the compressor, the temperature of the refrigerated space is...
  5. #2630 Through which of the components shown in the illustration is flash gas formation a normal occurrence? illustration
  6. #2631 According to 46 CFR Subchapter J, what is true concerning the installation of batteries used for diesel engine starting?
  7. #2632 What type of fuel oil as part of an oily-water mixture is most likely to have a density approaching that of water?
  8. #2633 Which of the devices shown in the illustration is designed for both inside and outside measurements? illustration
  9. #2634 Referring to the illustrated motorship freshwater cooling system drawing, which cooling system tanks are MOST likely to have oil separation capability... illustration
  10. #2635 Which of the figures shown in the illustration depicts an orthographic projection? illustration
  11. #2636 Suppose the illustrated pneumatically operated diaphragm actuated control valve is used to control the fuel oil outlet temperature of a steam-heated h... illustration
  12. #2637 Referring to the illustrated huddling-chamber safety valve, what statement concerning the blowdown adjusting ring (B) is true? illustration
  13. #2638 What is meant by a critical speed for rotating machinery?
  14. #2639 What would be caused by packing extremely soft grease into a roller bearing?
  15. #2640 Which of the following actions can be carried out in order to prevent thermal runaway in a transistor?
  16. #2641 If a mechanical mouse of a computer workstation is operating erratically, what maintenance should be performed?
  17. #2642 What process control system mode is MOST likely to have a steady-state error (also known as offset or residual error)?
  18. #2643 When it comes to motivating employees, it is important to distinguish between intrinsic and extrinsic motivation. What statement best represents the d...
  19. #2644 What statement is true concerning stress and personal psychological makeup of managers and supervisors?
  20. #2645 When planning for a fire and emergency drill, the crew should be motivated and challenged to do their very best. What type of simulation promotes this...
  21. #2646 Which of the following would be a positive outcome associated with performing a trend analysis of data acquired from lube oil testing, vibration senso...
  22. #2647 What statement is true concerning the use of a thermal imager for the purposes of conducting a thermographic analysis of equipment?
  23. #2648 In accordance with 33 CFR Subchapter O (Pollution), how long must the Oil Record Book be maintained on board those vessels for which the regulations a...
  24. #2649 If a new assistant engineer reports onboard, ideally, who should conduct the familiarization training specific and relevant to the engineer's routine...
  25. #2650 There are many tasks to carry out prior to and during bunkering. What is the best way to ensure no task is missed?
  26. #2651 At what point during the overall assessment process should the assessor provide the candidate with a copy of the assessment control sheet?
  27. #2652 You are chief engineer on a vessel that has a signal processing flow as depicted in figure "B" of the illustration. This flow processes pressure, temp... illustration
  28. #2653 To remove a hand-held right-handed straight cut reamer after it has gone all the way through a hole, you should __________.
  29. #2654 What is the alarm signal for manning boat stations or boat drills onboard a merchant ship?
  30. #2655 A roughened checkered surface is machined by a lathe on round stock using a __________.
  31. #2656 Besides extreme exertion in a hot environment such as an engine room, what causes heat cramps which is pain and spasms associated with the abdomen, le...
  32. #2657 What term represents the difference between synchronous speed and actual speed of a running AC induction motor?
  33. #2658 For what reason should engine room watchstanders make periodic checks on the loads carried by electric motors?
  34. #2659 Which of the following statements is correct regarding the fog applicators used in conjunction with the combination nozzle?
  35. #2660 According to 33 CFR, which type of Marine Sanitation Device (MSD) is used solely for the storage of sewage and flushwater at ambient air pressure and...
  36. #2661 An example of an antifriction bearing is a __________.
  37. #2662 How is solid trash and garbage generally admitted to a solid-waste incinerator on most ships?
  38. #2663 In the illustrated wound-rotor induction motor, how is the direction of rotation of the motor reversed? illustration
  39. #2664 If a patient has an electrical burn, you would check for breathing, pulse, and __________.
  40. #2665 By definition, which of the following is an example of a flammable liquid?
  41. #2666 What is the best protection against hand injuries from pinch points associated with being required to perform maintenance or repairs on rotating machi...
  42. #2667 While wearing a self-contained breathing apparatus, the user must be aware of the bulkiness of the unit in order to avoid confined spaces. Which limit...
  43. #2668 Why should battery rooms be well ventilated during the charging process?
  44. #2669 Which health hazard term is listed on a Safety Data Sheet (SDS) to indicate that contact with the substance will freeze body tissue on contact?
  45. #2670 While we understand that the production of Halon has been prohibited since 1994, it can still be used. Which of the following statements is true conce...
  46. #2671 Which of the following devices allows the user to remain in an oxygen deficient space for the longest period of time without interruption?
  47. #2672 If a thermometer reads 80°C, what is the equivalent temperature in °F?
  48. #2673 Which of the following methods is preferred by regulatory agencies, to reduce the possibility of producing an electrical spark when taking bunkers?
  49. #2674 After taking on fuel oil, the hoses should be disconnected and __________.
  50. #2675 The taper produced by a lathe taper attachment is determined by setting the __________.
  51. #2676 Which of the gasket types listed is typically used on high-pressure steam flange joints?
  52. #2677 What is a useful instrument for checking 3-phase AC motor performance by measuring possible unbalanced currents?
  53. #2678 Under what circumstances could equipment be operated when tagged with DANGER tags?
  54. #2679 A person manning a fire hose under pressure with an all-purpose nozzle attached should be aware that the nozzle is most difficult to control when the...
  55. #2680 In the system illustrated, which of the following readings should be indicated on the pressure gauge, if the load (x) is 8000 lbs. and the piston area... illustration
  56. #2681 Which of the following statements is true concerning the valve shown in the illustration? illustration
  57. #2682 Which of the following direct reading gauge types is the most popular type used for local display of pressures in the engine room?
  58. #2683 In which of the following heat related illnesses is it appropriate to reduce the individual's core temperature by immersion in a tub of cold water or...
  59. #2684 Water applied as a "fog" can be more effective than water applied as a "solid stream" for all the reasons listed EXCEPT?
  60. #2685 Where will you find the procedures for the reporting of oil discharge into the water?
  61. #2686 You are making a round of the engine room, approaching the motor driven cargo pumps, and you discover a person lying at the foot of the ladder. What a...
  62. #2687 What type of eye protection affords the best protection from dust and airborne abrasives?
  63. #2688 When blowing tubes, what is the determining factor in deciding how many revolutions of rotation of a sootblower element are required?
  64. #2689 To prevent blowback when attempting to light off an idle boiler, what statement is true?
  65. #2690 Small leaks in gaskets of a flanged pipe joint should be stopped immediately after installation for what reason?

General Subjects questions: what to expect

Q How many General Subjects questions are in the Engine pool?

There are 1,465 General Subjects 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 General Subjects module from the same pool.

Q What score do I need to pass the General Subjects module?

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

Q Are these the real USCG General Subjects 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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About the Engine question pool

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.