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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 1,101–1,200 of 5,775 · page 12 of 58

  1. #1197 When bunkering at anchorage which of the following signals must be displayed?
  2. #1198 What is LEAST likely to be used to strip a cargo tank?
  3. #1199 A precaution you should take before bunkering is to __________.
  4. #1200 A tanker is loaded with 5,000 barrels of petroleum. The cargo was loaded at a temperature of 70°F, and the coefficient of expansion is .0004. What is...
  5. #1201 Your ship has loaded 8,000 barrels of gasoline at a cargo temperature of 36°C (97°F). API gravity is 54°. The volume correction factor (VCF) is .0006....
  6. #1202 What is TRUE of pressure/vacuum valves?
  7. #1203 Your ship departed Venezuela for New York, loaded with 10,000 barrels of crude oil, whose average cargo temperature was 30°C (86° F). API is 25°. The...
  8. #1204 Which statement is TRUE of centrifugal pumps aboard tankers?
  9. #1205 Cargo pump relief valves are piped to the __________.
  10. #1206 Your ship has loaded 6,000 barrels of gasoline, at a cargo temperature of 50°F, departing New Jersey bound for Florida. API gravity is 55°. The volume...
  11. #1207 Your ship has loaded 6,000 barrels of gasoline, at a cargo temperature of 50°F, departing New Jersey bound for Florida. API gravity is 55°. The volume...
  12. #1208 Your ship has loaded 8,000 barrels of gasoline at a cargo temperature of 85°F, departing Aruba bound for New Jersey. API gravity is 55°. The volume co...
  13. #1209 Your ship has loaded 8,000 barrels of gasoline at a cargo temperature of 85°F, departing Aruba bound for New Jersey. API gravity is 55°. The volume co...
  14. #1210 Your ship has loaded 20,000 barrels of crude oil, departing Valdez, Alaska for San Francisco. When loaded the cargo temperature was 96°F. API was 15°....
  15. #1211 The liquid-filled PV breaker has acted to relieve a vacuum in a tank. What action must be taken in regards to the PV-breaker before continuing operati...
  16. #1212 Your ship has loaded 20,000 barrels of crude oil, departing Valdez, Alaska for San Francisco. When loaded the cargo temperature was 96°F. API was 15°....
  17. #1213 Your ship has loaded 22,000 barrels of crude oil, departing Valdez, Alaska for Panama. When loaded the cargo temperature was 90°F. API was 15°. The vo...
  18. #1214 Your ship has loaded 22,000 barrels of crude oil, departing Valdez, Alaska for Panama. When loaded the cargo temperature was 90°F. API was 15°. The vo...
  19. #1215 The process of adding mercaptans to gas, is known as which of the following?
  20. #1216 Each inert gas system must be designed to supply the cargo tanks with a gas, or mixture of gasses, that has an oxygen content by volume of __________.
  21. #1217 A cargo of oil has a coefficient of expansion of .0005 per degree F. If this cargo is loaded at 70°F, and a cargo temperature of 90°F is expected at t...
  22. #1218 A cargo of fuel oil is loaded whose temperature is 66°F. API gravity is 36°. The volume correction factor (VCF) is .0005. A cargo temperature of 80°F...
  23. #1219 A cargo of fuel oil is loaded whose temperature is 66°F. API gravity is 36°. The volume correction factor (VCF) is .0005. A cargo temperature of 80°F...
  24. #1220 During loading, what is the minimum pressure required to be maintained by the inert gas system on cargo tanks?
  25. #1222 Which function is NOT provided by the scrubber of an inert gas system?
  26. #1223 You are loading 530,000 barrels of cargo oil. At 0945 on 13 April, you find that you have loaded 202,000 barrels. At 1130, you find that you have load...
  27. #1224 You are loading 475,000 barrels of cargo oil. At 0800 on 8 July, you find that you have loaded 174,000 barrels. At 1000, you find that you have loaded...
  28. #1225 A centrifugal ballast pump has a capacity of 200 gpm. If suction is taken on a ballast tank containing 200 long tons of seawater, how much water will...
  29. #1226 A tank holds 400 tons of sea water when filled. How many tons of liquid of specific gravity 0.9300 will it hold when filled to 90% capacity?
  30. #1227 The tankship Northland is loaded as shown in table BL-0026 below. Use the salmon colored pages in the Stability Data Reference Book to determine the s...
  31. #1228 The tankship Northland is loaded as shown in table BL-0009 below. Use the salmon colored pages in the Stability Data Reference Book to determine the h...
  32. #1229 The tankship Northland is loaded as shown in table BL-0025 below. Use the salmon colored pages in the Stability book to determine the hogging numeral.
  33. #1230 The tankship Northland is loaded as shown in table BL-0003 below. Use the salmon colored pages in the Stability Data Reference to determine the saggin...
  34. #1231 The tankship Northland is loaded as shown in table BL-0001 below. Use the salmon colored pages in the Stability Data Reference Book to determine the h...
  35. #1232 The tankship Northland is loaded as shown in table BL-0002 below. Use the salmon colored pages in the Stability Data Reference Book to determine the s...
  36. #1233 According to the regulations, to prevent excessive pressure buildup in cargo tanks containing LFG, they are fitted with __________.
  37. #1234 Where are ullages measured from?
  38. #1235 The piping that routes an oil cargo from the manifold directly to a cargo tank and serves only one tank is known as a __________.
  39. #1236 The main underdeck pipeline on a tankship is connected to individual tanks by __________.
  40. #1237 The piping that routes an oil cargo from the manifold to underdeck pipelines is known as a __________.
  41. #1238 The main function of a stripping system is to __________.
  42. #1239 The fitting at the end of a cargo line in a tank that allows suction to be taken close to the bottom of a tank is a __________.
  43. #1240 What will NOT increase friction of a liquid flowing in a pipe and cause a loss of suction head?
  44. #1241 What is the most commonly used material for valve construction in LNG cargo piping?
  45. #1242 In accordance with regulations, what is the required bursting pressure of a cargo hose used for transferring liquefied gases?
  46. #1243 If two centrifugal pumps, driven by two independent electric motors, operating at unequal speeds are discharging an inflammable liquid through a commo...
  47. #1244 On a vapor control system, what must each vessel's vapor connection flange have?
  48. #1245 Which of the following conditions would be hazardous if you were using two centrifugal pumps to discharge a flammable liquid?
  49. #1246 Centrifugal pumps have what advantage(s) over reciprocating pumps?
  50. #1247 A deepwell pump is a type of __________.
  51. #1248 All of the following steps are taken in starting a centrifugal pump, EXCEPT to __________.
  52. #1249 Which method should be used to warm up the pump turbines prior to discharge?
  53. #1250 Steam driven pumps are considered, by regulations, sources of vapor ignition if the steam temperature is at least what temperature?
  54. #1251 Which of the following statements concerning deep well cargo pumps is correct?
  55. #1252 What are submerged LNG pump bearings lubricated by?
  56. #1253 The blowers of an inert gas generation system aboard a tanker, will be automatically secured if __________.
  57. #1254 What is TRUE of pressure/vacuum valves?
  58. #1255 What is the purpose of the relief valve of a cargo pump?
  59. #1256 Which characteristic is an advantage of a butterfly valve as compared to a gate valve?
  60. #1257 What is the purpose of a check valve?
  61. #1258 What type of valve will usually be on the discharge side of a cargo pump on a tank vessel?
  62. #1259 Pressure-vacuum relief valves on tank vessel cargo tanks should be kept in good working order to prevent __________.
  63. #1260 The high-level overfill tank alarm, installed in the on-board monitoring system, must __________.
  64. #1261 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...
  65. #1262 You are on an inerted tankship. A low pressure alarm must be set to cause an audible and visual alarm if the pressure in the tanks cannot be maintaine...
  66. #1263 Which part of the inert gas system is designed to relieve sudden large overpressures that exceed the capacity of the mechanical P/V valves?
  67. #1264 After the initial cleaning of flue gas in an inert gas system the gas is passed through what device for final cleaning?
  68. #1265 The deck water seal of the inert gas system __________.
  69. #1266 Which of the listed functions is the purpose of a gas scrubber in an inert gas generation system?
  70. #1267 In order for combustion to occur inside a piping system such as a vapor collection header in a marine emission control system, there must be _________...
  71. #1268 Tank vessel inerting refers to __________.
  72. #1269 An inert gas system on a tanker should be used to __________.
  73. #1270 On a hydrocarbon flammability chart the line which extends from 0% to 21.8% oxygen, lying tangent to the flammability range, is called the __________.
  74. #1271 The maximum allowable oxygen content within the ship's cargo tanks, inert gas piping and the vapor recovery system is __________.
  75. #1272 Which statement is TRUE concerning inert gas systems on tank vessels?
  76. #1273 Which operation may cause the pressure in an inert tank to fall below the prescribed limits?
  77. #1274 Which action must be taken when an individual cargo tank is closed off from the inert gas system by the tank isolation valve?
  78. #1275 Which of the following describes excessive recirculation of inert gas?
  79. #1276 Which of the following methods is used to supply inert gas from a flue gas system to the cargo tanks?
  80. #1277 How does an inert gas system on a tanker function to prevent explosions in cargo tanks?
  81. #1278 Where are remote readouts for oxygen concentration, pressure, and temperature of an inert gas system required to be located?
  82. #1279 Coast Guard Regulations permit which of the following systems to be used for fire prevention and the simultaneous inerting of cargo tanks on tank vess...
  83. #1280 Each inert gas system gas main must have an automatic shut down valve at the outlet of the gas production plant. This valve must close automatically u...
  84. #1281 Vapor recovery hoses must be tested yearly at what ratio to their maximum allowable working pressure?
  85. #1282 When checking the oxygen content of the cargo tanks prior to loading cargoes requiring vapor recovery, the atmosphere must be sampled __________.
  86. #1283 What is the combined fan discharge rate in an inert gas system is related to?
  87. #1284 What happens to steam that is produced by gas burning in excess of machinery plant demand?
  88. #1285 Liquefied flammable gas is defined as any flammable gas having a Reid vapor pressure exceeding how many pounds?
  89. #1286 The primary hazard of liquefied petroleum gas and liquefied natural gas is __________.
  90. #1287 One of the principal dangers inherent in liquefied petroleum gas is __________.
  91. #1288 Upon release to the atmosphere, LFG readily __________.
  92. #1289 Generally, the first action in extinguishing an LFG fire caused by escaping gas is to __________.
  93. #1290 What normally helps in detecting escaping gas?
  94. #1291 Why is gas-freeing rarely required for LPG cargo tanks?
  95. #1292 Why is gas-freeing rarely required for LPG cargo tanks?
  96. #1293 Tankers carrying cryogenic cargoes, such as LNG, are fitted with gas detector systems alarmed at 30% of the lower explosive limit. What is indicated i...
  97. #1295 What is the most common liquified gas cargo?
  98. #1296 Flames from small leaks of LFG may be extinguished by which of the following?
  99. #1297 Which of the following describes a chemical gas?
  100. #1298 At what maximum gas concentration must the fixed gas detection system on a LNG ship activate an audible and visual alarm?

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.