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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 501–600 of 1,128 · page 6 of 12

  1. #1073 What type of flow measuring device would measure totalized flow volume as opposed to an instantaneous flow rate?
  2. #1075 Which of the following flow meter primary devices works on the constriction type, differential head principle?
  3. #1077 For a pneumatic transmission system for instrumentation purposes, if a pneumatic instantaneous flow indicator has a calibrated scale of 0 to 1000 gpm,...
  4. #1082 For a pneumatic transmission system for instrumentation and control purposes, what is a common industry standard for pneumatic signal pressure range?
  5. #1083 For an analog electronic transmission system for instrumentation and control purposes, what is a common industry standard for electronic signal curren...
  6. #1084 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...
  7. #1086 On a ship with a periodically unmanned engine room, under what conditions must the propulsion console be continuously manned?
  8. #1087 Preferably when should the bridge be informed when engine room situations may affect the speed, maneuverability, power supply, or other essentials for...
  9. #1088 On deep-draft ships, what statement is true concerning high and low sea suctions for machinery space sea water cooling systems?
  10. #1089 What operating condition (or conditions) would necessitate shifting from a high sea suction to a low sea suction for a machinery space sea water cooli...
  11. #1090 What operating condition (or conditions) would necessitate shifting from a low sea suction to a high sea suction for a machinery space sea water cooli...
  12. #1091 What provision is made for sea chests for removal of solid debris restricting the entry grating into the sea chest of a machinery space sea water cool...
  13. #1092 What provision is made for sea chests for removal of air ingested into the sea chest of a machinery space sea water cooling system?
  14. #1093 What provision is made for sea chests for removal of ice from within the sea chest of a machinery space sea water cooling system during operation in i...
  15. #1103 For a typical diesel engine jacket water cooling system, what location would be generally used to introduce water treatment chemicals?
  16. #1151 In accordance with federal regulations under 33CFR Subchapter O, for oceangoing ships of less than 400 gross tons, what is the required means for prev...
  17. #1171 Under the international MARPOL regulations under Annex IV, if the ship is less than 3 nautical miles from the nearest land, what statement is true?
  18. #1172 Under the international MARPOL regulations under Annex IV, if the ship is more than 3, but less than 12 nautical miles from the nearest land, what sta...
  19. #1173 Under the international MARPOL regulations under Annex IV, if the ship is more than 12 nautical miles from the nearest land, what statement is true?
  20. #1174 Which of the following fire extinguishing agents which may be found aboard ship is designated as an ozone-depleting substance as defined in the Montre...
  21. #1175 Which of the following refrigerants which may be found aboard ship is designated as an ozone-depleting substance as defined in the Montreal Protocol o...
  22. #1176 In accordance with the international MARPOL Annex VI regulations, the nitrous oxide (NOx) emissions associated with certain diesel engines are require...
  23. #1190 The main difference between a common lathe dog and a safety lathe dog is that the latter __________.
  24. #1195 To obtain a 1/2 inch per foot taper on an 18 inch work piece, the tailstock of the lathe must be set over __________.
  25. #1197 If you are machining work held between lathe centers, and the lathe centers begin to squeal, you should first __________.
  26. #1199 A follower rest should be used with a lathe to machine __________.
  27. #1201 A work piece has been mounted between centers and a test cut machined at each end to check alignment of the lathe centers. If the test cut on the tail...
  28. #1203 When drilling holes larger than 1/2 inch, drilling a smaller hole first is a good practice. This is called a pilot hole, and the pilot drill should ha...
  29. #1204 Which material can be drilled at the highest speed?
  30. #1207 One of the steps required to increase the drilling speed of a drill press is to __________.
  31. #1208 A tapered shank drill is removed from the drill press spindle with a __________.
  32. #1210 Which of the listed metals can usually be drilled without lubrication?
  33. #1212 Before boring a blind tapered hole, a good shop practice to follow is to __________.
  34. #1214 A command signal input to the steering gear has initiated rudder movement for 20° right rudder. The follow-up mechanism at the beginning of the rudder... illustration
  35. #1215 Rudder position is shown on the bridge by the __________.
  36. #1216 When the helm angle position is changed, the series of corresponding events of the steering gear will include __________. I. rate of steering gear ram...
  37. #1220 In an electro-hydraulic steering system, damage due to rudder shock is prevented by __________.
  38. #1221 The device shown in the illustration is a/an __________. GS-0116 illustration
  39. #1225 As a result of a load or set point change, in addition to minimizing the maximum value of the error, what are the two additional objectives of a close...
  40. #1229 In a closed-loop process control system, what is meant by the proportional mode of control?
  41. #1230 In a closed-loop process control system, what term is used to describe the progressive reduction or suppression of oscillation in a component?
  42. #1231 The size of ball and roller bearings can be identified by the __________.
  43. #1232 Which bearing will carry the load on two small points diametrically opposite to each other?
  44. #1234 Which of the listed types of bearings is an example of a half bearing?
  45. #1237 When removing roller bearings from a shaft, the force of the puller should be applied to the bearing __________.
  46. #1238 Packing extremely soft grease into a roller bearing will cause __________.
  47. #1239 As the speed of an oil lubricated ball bearing increases, fluid friction, due to churning, generates heat. This condition may be avoided by __________...
  48. #1240 A dented race in an antifriction bearing could be caused by __________.
  49. #1243 One of the consequences in continuing to operate a centrifugal bilge pump with the discharge valve closed, is that the __________.
  50. #1244 The emergency bilge suction valve is typically used __________.
  51. #1245 Accidental flooding of the engine room bilges through the bilge system is prevented by __________.
  52. #1247 The aft starboard bilge well is clogged, and back flushing has not been successful. The next practical solution would be to __________.
  53. #1249 You are unable to pump out the aft starboard engine room bilge well that is fouled, with one foot of water over the top of the bilge well, what action...
  54. #1250 If one of the bilge system manifold valves does not properly seat, the __________.
  55. #1251 If an operating bilge pump is developing good vacuum, but is unable to discharge any water, which of the following problems is the most probable cause...
  56. #1252 If a bilge pump is able to develop vacuum, but is unable to sufficiently pump out the bilges, you would check for all of the following EXCEPT ________...
  57. #1253 Where a two-stage air ejector set is used in a two-stage flash evaporator, the first-stage air ejector takes suction from the second stage of the evap...
  58. #1254 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...
  59. #1255 In a flash type evaporator, all saltwater headers are vented through individual vent cocks to the __________.
  60. #1257 Steam supply for the operation of the low pressure evaporators may be obtained directly from the __________.
  61. #1258 The temperature of the steam flow to the saltwater feed heater, in a flash type evaporator can be manipulated by a/an __________.
  62. #1261 The thickest deposit of scale in a flash evaporator is most likely to occur in the tubes of the __________.
  63. #1264 The floating end of a shell-and-tube type cooler utilizes a packing ring to __________.
  64. #1266 Scale accumulation on evaporator heat exchange surfaces __________.
  65. #1267 If a higher than normal water level is observed through the inspection port of a flash evaporator, you should suspect __________.
  66. #1268 Carryover in a flash type distilling plant can be a result of __________.
  67. #1269 A high reading at a salinity cell located in the loop seal between two stages of a flash type evaporator would indicate __________.
  68. #1271 The quantity and density of brine discharged from the last effect of a flash type evaporator should be kept at a constant value so as to __________.
  69. #1274 Which of the listed problems could produce a high absolute pressure within a flash type evaporator?
  70. #1275 The thickest deposit of scale in a flash evaporator is most likely to occur in the tubes of the __________.
  71. #1282 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
  72. #1286 Which of the following statements describes the approximate relation between the feed water entering the unit shown in the illustration and brine bein... illustration
  73. #1287 Excess brine accumulated in the distiller, shown in the illustration, is removed during normal operation by __________. Illustration MO-0111 illustration
  74. #1288 Which of the following statements represents the two major functions provided by the item labeled "20" shown in the illustration? Illustration MO-0111 illustration
  75. #1289 Which of the following statements concerning the systems shown in the illustration is correct? Illustration MO-0111 illustration
  76. #1290 When securing a jacket-water heated submerged tube evaporator for an extended period of time, you should __________.
  77. #1291 Which of the following acids is preferable and most commonly used for scale removal from the heating surfaces of the jacket-water heated submerged-tub...
  78. #1293 What would be the first indication that a tube leak has occurred in area "23"? Illustration MO-0111 illustration
  79. #1294 Which of the conditions listed would indicate a large condenser tube leak within the distiller shown in the illustration? See Illustration MO-0111 illustration
  80. #1295 If valve "H" shown in the illustration is opened wide while the distiller is in operation, __________. Illustration MO-0111 illustration
  81. #1296 If the wearing rings of device "7" shown in the illustration become worn, how will the evaporation rate in "23" be affected? Illustration MO-0111 illustration
  82. #1297 What would happen if valve "25" shown in the illustration, vibrated open with the unit in operation? Illustration MO-0111 illustration
  83. #1298 If valve "D" is opened during the normal operation of the distiller shown in the illustration, which of the events listed will occur? Illustration MO-... illustration
  84. #1300 Regarding a reverse-osmosis type freshwater generator using multiple spiral-wound membrane modules, what statement is true?
  85. #1301 For the successful operation of a reverse-osmosis freshwater generator, why is the high pressure pump required to operate in the 750 to 1200 psig rang...
  86. #1305 What component of a reverse-osmosis freshwater generator could be isolated and replaced with the unit remaining in service?
  87. #1308 If a reverse-osmosis freshwater generator has fouled membrane modules, what statement is true?
  88. #1309 What is the BEST indication that the membrane module is damaged and is no longer semi-permeable and allowing the solute to pass through?
  89. #1312 A salinity indicator is used to determine the __________.
  90. #1313 A salinity indicating system functions on the basic principle of measuring the __________.
  91. #1314 The instrument always used in conjunction with a salinometer is a __________.
  92. #1316 Which of the following statements represents the basic principle of operation of an electrical salinity indicator?
  93. #1321 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...
  94. #1322 Which of the following desalination plants will always require a sterilizer when providing water to a potable water system?
  95. #1323 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...
  96. #1324 What design feature is used to minimize potable water wastage associated with hot water distribution piping for a potable water system?
  97. #1326 Which of the following speed control devices is used strictly as a safety device to prevent prime mover damage and acts by shutting down the prime mov...
  98. #1327 Which of the following statements is true concerning the application for an isochronous governor?
  99. #1328 Which term represents the ability of a speed control governor to maintain prime mover speed without hunting?
  100. #1329 What is meant by the term "hunting" as it applies to prime mover speed control governors?

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