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Deck · 5,775 questions

Deck General - USCG Exam Questions

Seamanship in the broad sense: marlinespike, ground tackle and anchoring, mooring and towing, weather, stability basics, and day-to-day vessel operations.

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 Deck General questions

Questions 1,301–1,400 of 5,775 · page 14 of 58

  1. #1404 Which refers to the depth of a petroleum product in a tank?
  2. #1405 When tank cleaning with a portable machine, how is the weight of the machine is suspended?
  3. #1406 When discharging a tanker, how can list be controlled?
  4. #1407 "Line Displacement" is a procedure that is followed at an oil terminal facility, when there is a change of which of the following?
  5. #1408 While loading bulk liquid cargo, a tank valve jams open, what is the first action you should take?
  6. #1409 Who must supervise functions aboard a tanker or tank barge such as connecting, disconnecting, and topping off?
  7. #1410 When stripping a tank, what is caused by excessive air in the suction line?
  8. #1411 What is the distance between the surface of the liquid and the tank top in a cargo tank called?
  9. #1412 Which of the following is equivalent to a "barrel", which is a unit of liquid measure?
  10. #1413 What is NOT a precaution to be taken when topping off?
  11. #1414 What is litmus paste is used to determine?
  12. #1415 According to U.S. regulations, no person may connect or disconnect an oil transfer hose or engage in any other critical oil transfer operation on a ta...
  13. #1416 Which of the following is the pipe used to connect two separate piping systems on a tank vessel?
  14. #1417 How should pinching of the cargo hose between the vessel and the dock be prevented?
  15. #1418 Which of the following terms best describes the amount of product in a tank measured from the tank top to the level of liquid?
  16. #1419 What should be the first consideration when discharging an oil cargo?
  17. #1420 How can you determine which grades of cargo a tank vessel is permitted to carry?
  18. #1421 During oil transfer operations, who would be responsible to guarantee that the posted transfer procedures are being followed?
  19. #1422 When loading bulk liquid cargo, what is the FIRST action you should take if a cargo valve jammed open?
  20. #1423 The sign used to caution persons approaching the gangway of a tank barge during cargo transfer should state which of the following?
  21. #1424 Which of the following procedures would insure proper seating of the valve when closing?
  22. #1425 Which factor must be considered when determining the order of loading of dissimilar products through the same piping system aboard a tanker?
  23. #1426 When loading a tanker, you should perform which of the following functions to ensure a safe operation?
  24. #1428 If a cargo of kerosene were considered "too lean" to explode, then it must be which of the following?
  25. #1429 The boiling point of Methane is -161°C. How is the substance carried?
  26. #1430 Which of the following would be classified as grade "C" petroleum product?
  27. #1431 LNG is carried at approximately what temperature?
  28. #1432 What is the primary hazard of liquefied petroleum gas and liquefied natural gas?
  29. #1433 Which of the following defines flammable liquids for the purpose of U.S. regulations?
  30. #1434 Which of the following describes a liquified gas?
  31. #1435 What is Reid Vapor Pressure?
  32. #1436 What grade are most crude oils are classified as?
  33. #1437 Which of the flash points would indicate a grade D combustible liquid?
  34. #1438 What do the designations A, B, C, D, and E refer to in grades of cargo?
  35. #1439 What is the standard unit of liquid volume used in the petroleum industry?
  36. #1440 What is the standard net barrel for petroleum products?
  37. #1441 In what condition is LNG transported?
  38. #1442 Which of the following describes one of the principle dangers inherent in liquified petroleum gas?
  39. #1443 What do the designations A, B, C, D, and E grades of cargo define?
  40. #1444 According to U.S. regulations, which of the following does not qualify as a discharge of oil?
  41. #1445 What term is not considered a "discharge" as it applies to the U.S. pollution regulations?
  42. #1446 Which topic is NOT required to be discussed at the pre-transfer conference?
  43. #1447 If you observe any situation which presents a safety or pollution hazard during the fuel transfer operations, which action should you take FIRST?
  44. #1448 What causes the most frequent incidents of pollution during tanker operations?
  45. #1449 Remote controls for quick-closing shut off valves are required in how many location(s)?
  46. #1450 Who enforces the U.S. pollution regulations that apply to ships?
  47. #1451 According to the Coast Guard Pollution Prevention Regulations (33 CFR), what is the minimum number of bolts required in a temporarily connected standa...
  48. #1452 The term "segregated ballast" is defined in the U.S. regulations as ballast water introduced into which of the following?
  49. #1453 Which of the following represents an emergency procedure used to stop the oil flow aboard tank vessels, of 250 tons or greater, as required by U.S. re...
  50. #1454 Which of the following describes the depth of a product in a tank?
  51. #1455 What does the MARPOL 73/78 convention deal with?
  52. #1456 It would be prudent to perform which of the following actions prior to the commencement of bunkering?
  53. #1457 In reference to accidental oil pollution, the most critical time during bunkering is when __________.
  54. #1458 U.S. regulations require that all oil spills in United States waters be reported immediately. Who is this report made to?
  55. #1459 Your vessel is taking on cargo oil when a small leak develops in the hose. You order the pumping stopped. What action should you take before you resum...
  56. #1460 While loading bulk oil, you notice oil on the water near the barge. Which of the following actions should you carry out FIRST?
  57. #1461 When you notice oil on the water near your vessel while taking on fuel, what should your first action be?
  58. #1462 Which is NOT a safety precaution to be observed during the loading of LFG?
  59. #1463 Which statement about the use of portable electric lights in petroleum product tanks is TRUE?
  60. #1464 Why is a warning sign displayed at the gangway or access point of a barge during cargo transfer?
  61. #1465 According to 46 CFR there are specific alarms that are required to be tested prior to cargo transfer. Which of the following items does not require te...
  62. #1466 For all loading operations, the terminal must supply the vessel with a means in which the vessel's designated person-in-charge may stop the flow of oi...
  63. #1467 If a repair team is to enter a confined space for repair work, what minimum level of oxygen should be present?
  64. #1468 Who completes the Declaration of Inspection before loading a tank vessel?
  65. #1469 U.S. regulations require a meeting before starting any oil transfer operation. Who must be in attendance at this meeting?
  66. #1470 The person in charge on the vessel and the person in charge at the facility must hold a meeting before starting the transfer of oil. Who must decide t...
  67. #1471 U.S. regulations state that no person may transfer oil to or from a vessel unless which of the following conditions is met?
  68. #1472 What should you do in order to reduce the accumulation of static electricity while loading petroleum products?
  69. #1473 To insure proper seating when closing a valve on a tank, what position should the valve be in?
  70. #1474 What is the lowest temperature at which a liquid will give off sufficient vapors to form a flammable mixture with air?
  71. #1475 Which statement is TRUE concerning insulating flanges?
  72. #1476 When is it acceptable to use power-driven or manually-operated spark producing devices in the pump room, where grades A, B, C, and D liquid cargoes ar...
  73. #1477 Which of the following does not require cargo transfer operations on a tank vessel to be stopped?
  74. #1478 According to U.S. regulations, which of the following is a requirement of the ventilation system of a pump room on a tanker?
  75. #1479 What is the inert gas system on a tanker used for?
  76. #1480 U.S. regulations require an emergency means of stopping the flow of oil or LNG during transfer operations. The emergency means may be which of the fol...
  77. #1481 Who is responsible for the final inspection ensuring a tank barge is provided with the required equipment and has fittings in good and serviceable con...
  78. #1482 Which of the following describes intrinsically safe equipment?
  79. #1483 The flame screens installed on tank vents that may contain combustible gases, are designed to prevent explosions by which of the following?
  80. #1484 The intakes for an air compressor on a tank vessel carrying grade A cargo may be located in which of the following areas?
  81. #1485 Which of the following choices does not depict the tank inerting process on a tank vessel?
  82. #1486 Under which of the following conditions will the blowers of an inert gas generation system aboard a tanker remain operational?
  83. #1487 The cargo pump relief valve is usually piped to which of the following components?
  84. #1488 What is the required gas supply capacity of an inert gas system?
  85. #1489 In an inert gas system, high pressure alarms are set in the main vapor collection line to cause an audible and visual alarm if the pressure reaches a...
  86. #1490 If the inert gas system was not in operation while loading crude oil on a tank vessel, what action would you take?
  87. #1491 Which of the following conditions will result in an automatic shut down of the flue gas inert gas system?
  88. #1492 On a tanker vessel, what is the required combined capacity of the inert gas generating system as compared to the total capacity of all the cargo pumps...
  89. #1493 What is the maximum allowable oxygen content within the ships cargo tanks, inert gas piping and the vapor recovery system?
  90. #1495 How is an inert gas system designed to reduce the possibility of tank explosions?
  91. #1496 What do the emergency shutdown requirements of U.S. regulations apply to?
  92. #1497 Which alarm is NOT found on an inert gas system?
  93. #1498 How does an inert gas system on a tanker function to prevent explosions in cargo tanks?
  94. #1499 Which is NOT a safety precaution to be observed during the loading of Liquefied Gas?
  95. #1500 What is the preferable way to extinguish an Liquefied Gas fire?
  96. #1501 What is generally, the first action in extinguishing an Liquefied Gas fire caused by escaping gas?
  97. #1502 In order to reduce the accumulation of static electricity while loading petroleum products, you should __________.
  98. #1503 Where is the most likely location for a cargo fire to occur on a tanker?
  99. #1504 What is the primary function of a flame screen on a tank vessel?
  100. #1505 Which of the following is the primary function of the screens that are fitted to the Fuel oil tank vents?

Deck General questions: what to expect

Q How many Deck General questions are in the Deck pool?

There are 5,775 Deck General 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 Deck General module from the same pool.

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

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

Q Are these the real USCG Deck General 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 Deck question pool

The Deck pool holds the current U.S. Coast Guard questions for every deck credential, from Able Seaman and the OUPV six-pack up to unlimited Master. Each question is multiple choice with four options, graded instantly, with the USCG reference shown where one exists.