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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 801–900 of 1,128 · page 9 of 12

  1. #1732 Two separate work pieces are to have a taper cut with the same taper per inch, using the offset tailstock method. After the first piece is completed,...
  2. #1734 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...
  3. #1735 When a lathe is used for thread cutting, the number of threads per inch produced is determined by the speed relationship between the __________.
  4. #1736 To commence cutting threads with a metal lathe, you should engage the __________.
  5. #1737 To properly cut an odd numbered thread with a lathe using the thread dial indicator illustrated, you should close the lathe split, or half-nut on ____... illustration
  6. #1738 If you are cutting off a piece of stock in a lathe and the work piece tends to climb over the top of the cutoff tool, you should __________.
  7. #1739 What is the reading of the vernier micrometer caliper scale shown in figure "G" in the illustration? Illustration GS-0083 illustration
  8. #1740 A reading of 0.625 inch on a micrometer with a 2 to 3 inch range would be equal to __________.
  9. #1741 The reading on the vernier caliper scale shown in figure "G" in the illustration is __________. Illustration GS-0082 illustration
  10. #1742 For greater accuracy, some micrometers have a vernier scale making it possible to read in increments of __________.
  11. #1743 The reading on the micrometer scale shown in figure "D" in the illustration is __________. Illustration GS-0081 illustration
  12. #1748 It is necessary to 'chalk' a file when the metal you are filing is __________.
  13. #1749 A new file should be broken in carefully by filing a piece of __________.
  14. #1750 Pushing the file endways (or with the axis), under pressure, against the work, is called __________.
  15. #1751 Which of the files listed is tapered on all sides and used to enlarge rectangular-shaped holes and slots?
  16. #1752 The terms rough, coarse, bastard, second cut, smooth, and dead smooth refer to the __________.
  17. #1756 Which of the figures illustrated is not suitable for use as a hex head set screw? Illustration GS-0080 illustration
  18. #1759 With regards to the American National Screw Thread nomenclature, 'pitch' is the __________.
  19. #1761 Which of the following types of nuts would be best suited to use when it is important that a nut not work itself loose due to vibration?
  20. #1765 The shaft sleeve for the pump illustrated is identified by the item numbered as __________. Illustration GS-0143 illustration
  21. #1766 The simplest method to use for determining if a centrifugal pump is operating as designed is to __________.
  22. #1767 A centrifugal bilge pump requires priming __________.
  23. #1775 Allowances may be made for the expansion and contraction in piping by the use of expansion joints or __________.
  24. #1776 A pipe coupling is a fitting having __________.
  25. #1777 The designation 'schedule 80 extra strong' refers to __________.
  26. #1778 Fittings used to close the ends of pipe are called 'pipe _____________'.
  27. #1779 Which of the following descriptions should be included when identifying the length for pipe nipples?
  28. #1782 All of the links in the next to the last inboard shot of chain are painted __________.
  29. #1783 All of the links in the last shot of anchor chain are painted __________.
  30. #1784 In the hydraulic anchor windlass system illustrated, pressure relief of the main pressure piping is provided by __________. Illustration GS-0160 illustration
  31. #1800 As shown in figure "A" of the illustrated block diagram of a central operating system configured for direct digital control, what does the output syst... illustration
  32. #1802 Which of the following illustrations represents the proper method of circuit grounding for a low level analog signal cable? Illustration EL-0124 illustration
  33. #1803 As shown in figure "A" of the illustration, what statement is true concerning the voltage sensing unit? Illustration EL-0066 illustration
  34. #1813 Which bearing will carry the load on two small points diametrically opposite to each other?
  35. #1814 With respect to shaft bearing load absorption capability in terms of direction, what is meant by a radial load?
  36. #1815 The size of ball and roller bearings can be identified by the __________.
  37. #1816 With respect to shaft bearing load absorption capability in terms of direction, what is meant by an axial load?
  38. #1817 In order for a reverse osmosis fresh water generator to be able to overcome the osmotic pressure without damaging the spiral-wound membrane modules, t...
  39. #1821 If a higher than normal water level is observed through the inspection port of a flash evaporator, you should suspect __________.
  40. #1822 While standing watch in the engine room, you notice a high reading at a salinity cell located in the loop seal between two stages of a flash type evap...
  41. #1823 Indicated high salinity of the distillate discharged from a flash-type distilling plant will be a result of __________.
  42. #1825 The absolute pressure maintained in the shell of the salt water feed heater on most flash evaporators used on steam propelled vessels is __________.
  43. #1826 In the unit illustrated, the feed water temperature is required to be increased to 165°F or greater and must exist at this temperature when leavin... illustration
  44. #1827 In a two stage flash distilling plant, which of the pumps listed is vented to the shell of the second stage in order to remove vapor from the pump suc...
  45. #1828 In a jacket water heated submerged tube evaporator, what is the primary factor that determines the rate of scale build-up on the submerged tube bundle...
  46. #1829 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
  47. #1830 What would happen if valve "25" shown in the illustration, vibrated open with the unit in operation? Illustration MO-0111 illustration
  48. #1832 What is the function of device "A" shown in the illustration? Illustration MO-0110 illustration
  49. #1833 The pipe identified by the letter "J" shown in the illustration is __________. Illustration MO-0110 illustration
  50. #1837 For the operation of the illustrated device, what fluid flow would be expected at the connection labeled "I"? Illustration MO-0110 illustration
  51. #1838 The heat exchanger plates, used in the device shown in the illustration, are produced from which of the listed materials? Illustration MO-0110 illustration
  52. #1839 Which of the following is NOT a function of the water supply through item "P" shown in the illustration? Illustration MO-0110 illustration
  53. #1843 If the demister used in the device shown in the illustration is improperly installed, which of the following will occur? Illustration MO-0110 illustration
  54. #1844 The primary reason low-pressure evaporators produce distillate more efficiently, and with less scale formation, than high-pressure evaporators is ____...
  55. #1846 With regard to fresh water generators, what statement concerning brine is true?
  56. #1847 In the production of fresh water from sea water through a process of heating and cooling, the cooling phase of production is usually called __________...
  57. #1848 Which of the following fresh water generators has an operating principle that evaporates pre-heated sea water by causing it to undergo a pressure drop...
  58. #1849 In a flash evaporator, scale as a result of higher than normal temperatures is most likely to occur in the __________.
  59. #1850 When securing a flash-type evaporator for an extended period of time, you should __________.
  60. #1851 Item "10" shown in the illustration is used to __________. Illustration MO-0111 illustration
  61. #1852 Which device is used to prevent over pressurization of the illustrated distiller? Illustration MO-0111 illustration
  62. #1853 Where is the latent heat obtained to create vapor from the feed water in the illustrated distiller? Illustration MO-0111 illustration
  63. #1854 Excess brine accumulated in the distiller, shown in the illustration, is removed during normal operation by __________. Illustration MO-0111 illustration
  64. #1855 Which of the following statements describes the approximate relation between the feed water entering the unit shown in the illustration and brine bein... illustration
  65. #1856 Which of the following statements describes what will occur to the volume of water vapor as it is exposed to the lower temperatures existing in the de... illustration
  66. #1863 Which term represents the change in speed required before a speed control governor will initiate corrective action as the load changes?
  67. #1864 Overheating of the oil in a hydraulic system can be caused by __________.
  68. #1865 While starting a hydraulic anchor windlass, you observe that hydraulic pressure does not develop in spite of the proper operation of the electric driv...
  69. #1866 You press start button on the hydraulic power unit shown in the illustration, and the motor does not start. The first thing you should check is the __... illustration
  70. #1867 Overheating of a hydraulic system may be a result of __________.
  71. #1868 If a hydraulic pump is producing a noisy whine when in operation, the cause may be __________.
  72. #1884 When renewing sections of pipe in a hydraulic system, the nominal pipe size of the piping always indicates the __________.
  73. #1889 The ability of a metal to be hammered, or rolled out is called its __________.
  74. #1890 Reheating a hardened component to a temperature lower than the hardening temperature and then cooling it is known as __________.
  75. #1891 When hardened metal is heat-treated by a process known as tempering, what metallurgical properties are achieved?
  76. #1892 When metal is tempered, it becomes __________.
  77. #1893 What is the purpose of heat treating steel?
  78. #1894 Monel metal is an alloy composed mainly of __________.
  79. #1895 When a metal is undergoing heat treatment, what happens when the metal is heated above its critical temperature?
  80. #1896 When a metal is undergoing heat treatment for the purposes of annealing, besides refining the grain structure, what is the determining characteristic...
  81. #1897 When a low carbon steel is undergoing heat treatment for the purposes of casehardening, what is the process that distinguishes this procedure from oth...
  82. #1898 What effect does preheating, concurrent heating, or post heating have on welding a joint?
  83. #1899 What is meant by the term tensile strength of a material?
  84. #1900 What is meant by the term toughness as it applies to a material?
  85. #1903 Referring to the illustration, what would be the result if the upper oil/water interface detection probe became faulty? Illustration GS-0175 illustration
  86. #1906 Referring to the illustration, note that the solenoid in line "C" is closed. The check valve in line "E" is open. The separator service pump is runnin... illustration
  87. #1911 Referring to the illustration, note that the solenoid in line "C" is closed. The check valve in line "E" is open. The separator service pump is runnin... illustration
  88. #1916 How would the pressure setting of the illustrated self-contained, internal-pilot, piston-operated steam pressure-reducer be raised to a higher set poi... illustration
  89. #1918 In the illustrated self-contained, internal-pilot, piston-operated steam pressure-reducing valve, what statement is true concerning the pilot and main... illustration
  90. #1919 Suppose the illustrated self-contained, internal-pilot, piston-operated temperature control valve is part of the temperature control system for a stea... illustration
  91. #1923 Referring to the illustrated huddling-chamber safety valve, what statement concerning the blow down adjusting ring (B) is true? Illustration SG-0018 illustration
  92. #1924 Referring to the illustrated huddling-chamber safety valve, what statement is true concerning the adjustment of blow down? Illustration SG-0018 illustration
  93. #1925 In the illustrated huddling-chamber safety valve, what statement is true concerning the opening and closing forces acting upon the disc? Illustration... illustration
  94. #1928 Suppose the pilot controller for the illustrated pneumatically operated diaphragm actuated control valve is supplied with 20 psig control air and is d... illustration
  95. #1932 Suppose the illustrated pneumatically operated diaphragm actuated control valve is used to control the fuel oil outlet temperature of a steam-heated h... illustration
  96. #1933 Suppose the pilot pressure is from 3 to 15 psig for the illustrated pneumatically operated, diaphragm actuated control valve. Assuming the control val... illustration
  97. #1934 What type of steam trap is most susceptible to damage if allowed to come into contact with superheated steam?
  98. #1935 Referring to the illustrated impulse steam trap, what would be the effect of threading the control cylinder "E" upward out of the trap body? Illustrat... illustration
  99. #1942 The term, whole depth of the gear, shown in the illustration, is equal to __________. Illustration GS-0111 illustration
  100. #1947 In the illustration shown, what is the distance indicated by dimension "I"? Illustration GS-0001 illustration

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