USCGQ
Log in Start free
USCGQ
Toggle sidebar
Home
Engine
General Subjects
Start practicing

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.

Random question Build a timed exam

All General Subjects questions

Questions 101–200 of 1,128 · page 2 of 12

  1. #204 When using a chisel, you should __________.
  2. #205 The best type of chisel to use for cutting a keyway is the __________.
  3. #206 The temper is likely to be drawn out from a chisel edge when you __________.
  4. #207 Some heavy duty screwdrivers are made with a square shank to __________.
  5. #208 An offset screwdriver is best used for __________.
  6. #211 Screwdrivers designed for electrical use should have __________.
  7. #212 Which of the screwdrivers listed is designed for the precision assembly of small parts?
  8. #213 Which of the screwdrivers listed has a tip surrounded by parallel fluted ridges resembling the ridges of a splined socket wrench?
  9. #215 Which of the screwdrivers listed is designed with the shaft made from double coil wire or tightly coiled steel?
  10. #216 A grease gun is generally used to lubricate a __________.
  11. #217 Ball peen hammers are sized according to their __________.
  12. #218 The tool best suited for cutting pipeline flange gaskets to the correct size is __________.
  13. #219 The best tool to use when attempting to widen the opening of a flanged joint, in preparation for renewing the gasket, is a __________.
  14. #221 If you are hand tapping holes in cast iron, you should __________.
  15. #222 When internal threading for piping where the work permits the tap to be run entirely through you can begin and end the tapping of the hole by using a...
  16. #223 If you are cutting external threads by hand and you start the die at an angle, the threads will __________.
  17. #224 The proper tool used for cutting new external threads is called a thread __________.
  18. #225 The names plug, bottom, and taper refer to __________.
  19. #227 If a bolt or stud were to break off flush at the surface, which of the listed actions would probably be the best first step to begin the process of it...
  20. #233 The letters 'NC' in '1/4-20 NC' indicates the bolt is __________.
  21. #237 To set the dividers to the proper radius, you should use a __________.
  22. #238 The center head of a combination square set is used to __________.
  23. #239 Which of the instruments listed is used to measure the gauge of a piece of sheet metal?
  24. #240 To measure the circumference of a piece of pipe, you should use a __________.
  25. #242 A metal scribe commonly found on a Combination Square measuring tool should only be used to __________.
  26. #243 A dial indicator is used to measure __________.
  27. #244 To get an accurate measurement using a 12 inch machinist's steel rule, you should measure __________.
  28. #246 All portable electric tools should have a ground connection to prevent __________.
  29. #247 A grinding wheel is trued with a __________.
  30. #248 A coolant is usually used when cutting metal in a power hacksaw to prevent the __________.
  31. #249 Which practices should be followed at all times when using an electric grinding machine?
  32. #250 The blade for a power hacksaw should be installed with the teeth __________.
  33. #251 Air leakage between the shaft and stuffing box packing in a centrifugal pump is prevented by __________.
  34. #252 The function of seal cages, or lantern rings installed in the centrifugal pump stuffing boxes, is to __________.
  35. #253 Permanent centrifugal pump shaft damage due to erosion, corrosion, and wear at the stuffing box is usually prevented by __________.
  36. #254 The pressure of a liquid leaving the pump can be referred to as the __________.
  37. #255 Which of the following terms is used to identify the pressure of a liquid entering a centrifugal pump?
  38. #256 A pump is defined as a device that __________.
  39. #257 The basic function of the centrifugal pump impeller is to __________.
  40. #258 Which of the following statements is true concerning centrifugal pumps?
  41. #259 When repacking a stuffing box fitted with a lantern ring, which of the following precautions should be observed?
  42. #260 A centrifugal pump gradually develops insufficient discharge pressure. What corrective action is required?
  43. #261 When renewing spiral packing in a centrifugal pump stuffing box, after the packing is firmly seated, the packing gland nuts should be __________.
  44. #262 What should be done if localized scoring is discovered on a pump shaft sleeve during routine maintenance inspection?
  45. #263 Why should the use of metallic or semi-metallic packing hooks or pullers be avoided on bronze or brass shafts, rods, plungers, or sleeves?
  46. #264 To prevent overheating and scoring of the shaft after repacking the stuffing box, which of the following procedures should be carried out?
  47. #265 A pump shaft that is bent or distorted should normally be __________.
  48. #266 Excessive air leakage into the suction side of a centrifugal pump would be indicated by which of the following operational problems?
  49. #267 Pitting in the suction areas of a centrifugal pump bronze impeller is usually caused by __________.
  50. #268 Reduced capacity, accompanied by vibration and noise at the suction of a centrifugal pump, results from cavitation in the fluid being pumped. Cavitati...
  51. #269 You suspect a problem with the centrifugal fire pump on your ship, and begin to slowly close the discharge valve. Your suspicion is confirmed when the...
  52. #270 A centrifugal pump may fail to deliver water when first started if the __________.
  53. #271 Charring or glazing of the inner circumference of the packing rings in a centrifugal pump is caused by __________.
  54. #272 The three basic parts of any eductor are the nozzle, the suction chamber, and the __________.
  55. #273 A distinguishing feature of an eductor, when compared to other pumps, is the __________.
  56. #277 One disadvantage of using a mechanical shaft seal instead of mechanical packing is that __________.
  57. #278 When installing a mechanical shaft seal on a pump, it is important to ______.
  58. #279 Which of the listed types of seals is used effectively for pumps handling toxic or highly flammable liquids that cannot be permitted to escape into th...
  59. #280 Which of the following statements is true regarding mechanical seals?
  60. #281 Which of the materials listed is used as the dynamic seal material on mechanical seals installed on most centrifugal pumps used in water service?
  61. #282 Mechanical shaft seals used on water service pumps require lubrication of the seal faces to minimize deposits of foreign matter on those surfaces. Whi...
  62. #283 Which of the following statements represents the main difference between a stuffing box gland and a mechanical seal for sealing the shaft of a centrif...
  63. #284 Which of the pumping systems listed for use aboard ship will most likely use a propeller type pump?
  64. #285 One of the main differences between a propeller pump and a centrifugal pump is the absence of a __________.
  65. #286 Which type of pump would normally be used to transfer fairly large quantities of fluids at relatively low pressures?
  66. #287 Which of the following is NOT an identifiable characteristic of a steam reciprocating pump?
  67. #288 Which of the following valve arrangements permits the reciprocating pump liquid piston to take suction from the suction chamber, and simultaneously di...
  68. #290 Which of the listed reciprocating pump parts control the position of the pilot slide valve?
  69. #291 The suction-force principle of operation is a typical characteristic of __________.
  70. #292 The total length of stroke in a reciprocating steam pump can be adjusted by __________.
  71. #293 When securing a steam reciprocating pump, which of the valves listed should remain open?
  72. #294 When the danger of freezing exists, all steam driven reciprocating pumps and deck equipment should be __________.
  73. #295 When a reciprocating pump is operating at maximum speed, the cushioning valves should be __________.
  74. #296 When repacking a reciprocating pump with more than four rings of packing, the packing is cut square, installed with the ends abutted, and each succeed...
  75. #297 To safely remove the piston rod packing from the steam end of a reciprocating pump, you should __________.
  76. #298 Which of the listed types of steam end piston rod packing should be used in a steam reciprocating pump?
  77. #299 Which of the lubricants listed is the best to use on a reciprocating pump rod?
  78. #300 The first step when resetting the slide valves on a duplex reciprocating pump is to __________.
  79. #301 Excessive lost motion in the valve mechanism of a duplex reciprocating pump will cause the __________.
  80. #302 An inadequate reciprocating bilge pump discharge is most often caused by __________.
  81. #303 A pounding noise occurring in one cylinder of a steam reciprocating general service pump could be caused by __________.
  82. #305 Which of the following conditions would prevent a steam reciprocating pump from delivering its rated capacity?
  83. #307 Liquid is kept from leaking out at the shaft ends of a helical gear pump by __________.
  84. #308 Which of the listed parts is used in a lobe-type rotary pump to allow for wear on the lobe edges?
  85. #310 The output volume of a positive fixed displacement pump can be changed only by __________.
  86. #311 Positive displacement, helical gear pumps are well suited for pumping oil because __________.
  87. #312 The capacity of a gear type rotary pump, when operated at a constant speed, will decrease with an increase in the pump __________.
  88. #313 A spur gear pump should be operated with the discharge valves __________.
  89. #314 How does the viscosity of a fluid being pumped affect the operation of a spur gear pump?
  90. #315 Why is the discharge pressure of a herringbone gear pump steadier than the discharge pressure of a simple spur gear pump?
  91. #316 One of the main differences between the various types of screw pumps is in the __________.
  92. #317 An increase in rotor clearances in a rotary pump will __________.
  93. #318 To anneal a copper gasket, you should heat the gasket __________.
  94. #319 When replacing a gasket in a six-bolt flanged joint, in what order should the bolts be tightened?
  95. #320 If you were uncertain as to what type of gasket material to install in a pipeline, you should __________.
  96. #321 To properly make and fit a new gasket to a flange, you should __________.
  97. #324 Which pipe listed has the largest outside diameter?
  98. #325 Piping cross-sections over 12 inches in diameter are sized by the __________.
  99. #326 Which of the listed pipe sizes is not commonly used?
  100. #327 Copper tubing is manufactured and classified as type K, L, and M. Which type would offer the greatest wall thickness for a given nominal size?

Other Engine modules

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.