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Engine · 674 questions

Retired questions · General Subjects - USCG Exam Questions

These are retired questions the Coast Guard no longer draws exams from. They stay online for reference; the current questions are in General Subjects.

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 Retired questions · General Subjects questions

Questions 401–500 of 674 · page 5 of 7

  1. #1019 The best tool to use to measure the number of threads per inch on a bolt is a __________.
  2. #1022 Which of the devices shown in the illustration is designed for both inside and outside measurements? GS-0073 illustration
  3. #1023 To set the dividers to the proper radius, you should use a __________.
  4. #1028 Which of the figures in illustration GS-0080 would be used in conjunction with figure "B" of the device shown in illustration GS-0124? GS-0080 illustration
  5. #1029 Which of the figures illustrated is not suitable for use as a hex head set screw? GS-0080 illustration
  6. #1031 The number of screw threads per inch for a Standard National Coarse 1/2 inch bolt is __________.
  7. #1033 Which of the figures illustrated is known as an Allen head set screw? GS-0080 illustration
  8. #1034 The locking plates shown in the illustration are used in many marine applications. Which figure indicates the improper method for using these devices?... illustration
  9. #1035 Which of the figures illustrated would be LEAST desirable for use as a set screw? GS-0080 illustration
  10. #1039 A horizontal electro-mechanical anchor windlass is equipped with two warping heads, two wildcats, two manual brake hand wheels, two clutch control lev...
  11. #1040 A horizontal electro-mechanical anchor windlass is equipped with two warping heads, two wildcats, two manual brake hand wheels, two clutch control lev...
  12. #1041 A horizontal electro-mechanical anchor windlass is equipped with two warping heads, two wildcats, two manual brake hand wheels, two clutch control lev...
  13. #1050 As it pertains to the luffing motion limits associated with an electro-hydraulic cargo- handling pedestal-type deck crane, what statement is true?
  14. #1051 As it pertains to the hoist motion limits associated with an electro-hydraulic cargo- handling pedestal-type deck crane, what statement is true?
  15. #1055 Which of the following filled thermal systems used as a temperature transmitting/receiving system usually is associated with a display with a non-unif...
  16. #1059 For a pneumatic transmission system for instrumentation purposes, if a pneumatic temperature indicator has a calibrated scale of -40 to +40 F, what wo...
  17. #1064 Which of the following pressure sensing mechanisms in a linear-scaled pneumatic indicator is generally used to sense pneumatic pressure as received fr...
  18. #1066 Which of the following direct pressure measuring instruments is most appropriately used for measuring extremely high pressures up to 80,000 psig?
  19. #1069 What statement is true concerning the operating principle of a liquid level sensing and transmitting system of the capacitance type?
  20. #1070 For an analog electronic transmission system for instrumentation purposes, if an electronic level indicator has a calibrated scale of 0 to 1800 mm, wh...
  21. #1074 With a constriction type, differential head flow meter, which of the following would be an example of a primary device?
  22. #1078 Suppose the photodetector of an optical tachometer detects a time interval of 0.05 seconds between the leading edges of the pulses created by the refl...
  23. #1079 What statement is true concerning the arrangement and operation of the viscosity transmitter as used for indicating the viscosity of heavy fuel oil?
  24. #1080 What statement is true concerning the operation of a distilling plant or boiler feed water salinometer?
  25. #1081 If an oil-in-water content monitor uses a lamp emitting light in the visible spectra in conjunction with a reference photo-cell and a sampling photoce...
  26. #1085 On a ship with a periodically unmanned engine room, the duty engineer is responsible for making machinery space rounds when the engine room is unatten...
  27. #1094 Referring to the illustrated steam plant seawater cooling system drawing, which pump can be used to pump out the main machinery space bilge in a flood... illustration
  28. #1095 Referring to the illustrated steam plant seawater cooling system drawing, which pump is considered a high-head pump operating with the highest dischar...
  29. #1096 Referring to illustrated steam plant seawater cooling system drawing, what statement is true concerning seawater service system to auxiliary circulati...
  30. #1097 Referring to illustrated steam plant seawater cooling system drawing, what statement is true concerning main circulating to auxiliary circulating seaw...
  31. #1098 Classification society requirements stipulate that main sea water cooling pumps be furnished with redundancy with either two dedicated pumps or with o... illustration
  32. #1099 Referring to the illustrated motor ship fresh water cooling system drawing, what statement is true concerning the main engine jacket water cooling tem... illustration
  33. #1100 Referring to the illustrated motor ship fresh water cooling system drawing, what statement is true concerning the main engine jacket water cooling sys... illustration
  34. #1101 Referring to the illustrated motor ship fresh water cooling system drawing, what statement is true concerning the jacket water heater? (MP-CW-06) illustration
  35. #1102 Referring to the illustrated motor ship fresh water cooling system drawing, what statement is true concerning the standby heating coil? Refer to Illus... illustration
  36. #1104 Referring to the illustrated motor ship fresh water cooling system drawing, what statement is true concerning the evaporator? Refer to Illustration MP... illustration
  37. #1105 Referring to the illustrated motor ship fresh water cooling system drawing, what statement is true concerning the turbocharger bypass line associated... illustration
  38. #1106 Referring to the illustrated motor ship fresh water cooling system drawing, which set of cooling water pumps would MOST likely require a priming maint... illustration
  39. #1107 Referring to the illustrated motor ship fresh water cooling system drawing, which cooling system has cooling water passing through passages within com... illustration
  40. #1108 Referring to the illustrated motor ship fresh water cooling system drawing, which cooling system tanks are MOST likely to have oil separation capabili... illustration
  41. #1109 What type of bottom construction is used on most commercial deep-draft vessels with the exception of tankers?
  42. #1111 What statement is true concerning the keel arrangements of a double-bottomed ship?
  43. #1112 For a transverse-framed ship of double-bottom construction, what structural members supports the inner bottom shell (or tank-tops)?
  44. #1113 What is usually contained within the double-bottom tanks associated with the machinery spaces?
  45. #1114 How is access to the double-bottom tanks usually provided for inspection, cleaning, maintenance, and repairs of tank interiors?
  46. #1117 What is the name of the opening in a bilge margin bracket that reduces the weight of the bracket without materially reducing its strength?
  47. #1118 What statement concerning the orientation and welds of adjoining shell plates is true?
  48. #1121 In terms of ship construction framing methods, what statement is true concerning the longitudinal framing system?
  49. #1122 What statement is true concerning the plating meeting at the gunwales of a ship?
  50. #1123 With a ship built with a transverse framing system, by what means are double-bottom floors and the transverse frames joined?
  51. #1125 What is another name for the "collision" bulkhead?
  52. #1126 What term is used to represent the bulkhead type used for tank boundary bulkheads?
  53. #1127 Which of the following listed bulkhead types has the most rigorous standard for testing purposes?
  54. #1129 What is the name of the structural member that is designed to transfer load from one deck to another?
  55. #1130 What statement is true concerning watertight doors fitted below the waterline of a vessel?
  56. #1131 What means of emergency escape from a shaft tunnel are provided?
  57. #1132 What statement is true concerning the forward and after bulkheads of a shaft tunnel?
  58. #1133 What is the arrangement of a shaft tunnel as fitted on a single-screw vessel?
  59. #1134 What is the general arrangement for bilge wells in the machinery spaces?
  60. #1135 What provisions are generally made to reduce the noise and vibration emanating from the propulsion machinery installation, especially on passenger shi...
  61. #1136 What is the name associated with the dividing bulkheads separating the accommodation spaces from the engine room of a ship?
  62. #1137 What is the name associated with the surround and support for the various uptakes to ensure the dispersion of exhaust gases to the atmosphere and away...
  63. #1140 When accomplishing welding repairs with an electric arc welding process, what is generally the cause of slag inclusion when welding a single-V butt jo...
  64. #1142 When accomplishing welding repairs using the electric arc welding process, what statement is true concerning the characteristics of a good quality wel...
  65. #1143 When accomplishing welding repairs using the electric arc welding process, what statement is true concerning the characteristics of a good quality wel...
  66. #1144 Before welding repairs are performed to repair a crack, what is the correct procedure for performing an emergency crack stopper?
  67. #1145 Before welding repairs are performed to repair a crack, after drilling a 3/8-inch hole at each end of the crack, what is the correct procedure for wel...
  68. #1146 In order to minimize distortion while performing the electric arc welding process while joining two plates with a butt weld, besides using restraint p...
  69. #1147 For long welding runs, either the "back-step" or the "skip" welding technique is often used. For what purpose are these techniques utilized?
  70. #1148 If a welding fabrication becomes unacceptably distorted, what means of distortion correction should be avoided?
  71. #1149 In accordance with international MARPOL Annex I regulations and federal regulations under 33CFR Subchapter O, for vessels of 400 gross tons and above...
  72. #1150 In accordance with federal regulations under 33CFR Subchapter O, for U.S non- oceangoing ships, what is the required means for preventing pollution by...
  73. #1152 In accordance with international MARPOL Annex I regulations and federal regulations under 33CFR Subchapter O, for oceangoing ships of 400 gross tons a...
  74. #1153 In accordance with international MARPOL Annex I regulations and federal regulations under 33CFR Subchapter O, for oceangoing ships of 10,000 gross ton...
  75. #1155 In accordance with the international MARPOL Annex I regulations and the federal regulations in 33CFR Subchapter O, specific machinery space operations...
  76. #1156 In accordance with the international MARPOL Annex I regulations and the federal regulations in 33CFR Subchapter O, specific machinery space operations...
  77. #1157 In accordance with the federal regulations in 33CFR Subchapter O, continuing violations of The Federal Water Pollution Control Act and international M...
  78. #1160 In accordance with international MARPOL Annex V regulations and federal regulations under 33CFR Subchapter O, the prohibition of the discharge of all...
  79. #1162 In accordance with international MARPOL Annex V regulations and federal regulations under 33CFR Subchapter O, the prohibition of the discharge of ungr...
  80. #1164 In accordance with international MARPOL Annex V regulations and federal regulations under 33CFR Subchapter O, the discharge or disposal of garbage on...
  81. #1165 Under the federal regulations of 33CFR Subchapter O, what is the definition of the term "sewage"?
  82. #1166 Under the federal regulations of 33CFR Subchapter O, what is the definition of a "Type I Marine Sanitation Device"?
  83. #1167 Under the federal regulations of 33CFR Subchapter O, what is the definition of a "Type II Marine Sanitation Device"?
  84. #1168 Under the federal regulations of 33CFR Subchapter O, what is the definition of a "Type III Marine Sanitation Device"?
  85. #1169 Under the federal regulations of 33CFR Subchapter O, if a vessel equipped with a Type III Marine Sanitation Device enters a body of water where the di...
  86. #1177 In accordance with the international MARPOL Annex VI regulations, the sulphur content of any fuel oil used on board ships shall not exceed what percen...
  87. #1178 In accordance with the international MARPOL Annex VI regulations, in the absence of an exhaust gas cleaning system, what is the maximum allowable sulp...
  88. #1179 In accordance with the international MARPOL Annex VI regulations, which of the listed substances is prohibited from being burned in a shipboard incine...
  89. #1180 In accordance with the international MARPOL Annex VI regulations, which of the listed substances is prohibited from being burned in a shipboard incine...
  90. #1181 In accordance with the international MARPOL AnnexVI regulations, what is the minimum allowable flue gas outlet temperature for a continuous-fed shipbo...
  91. #1182 In accordance with the international MARPOL Annex VI regulations, what is a permissible alternative to burning oil residue sludge in an appropriate in...
  92. #1183 The tool shown in the illustration is called a __________. GS-0072 illustration
  93. #1184 The lathe tool shown as figure "U" in the illustration is commonly known as a/an __________. GS-0090 illustration
  94. #1185 Which of the illustrated lathe tools would be used to produce a smooth finish cut for figure I? GS-0009 illustration
  95. #1186 The lathe tool shown as figure "T" in the illustration is commonly known as a/an __________. GS-0090 illustration
  96. #1187 The lathe tools shown as figure "M" in the illustration are commonly known as __________. GS-0090 illustration
  97. #1188 Which single illustrated lathe tool could be used to turn down the stock in figure II? GS-0009 illustration
  98. #1189 The lathe tool shown as "Q" in the illustration is a __________. GS-0090 illustration
  99. #1191 Which of the illustrated figures represents the use of a right hand roughing tool? GS-0090 illustration
  100. #1192 The lathe tool shown as figure "R" in the illustration would best be used to __________. GS-0090 illustration

General Subjects questions: what to expect

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

This retired set holds 674 General Subjects questions the Coast Guard no longer draws on exams. They stay online for reference; the current General Subjects module is the one to study.

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.