competence 8.2

通報

問題一覧

46. Which of the following spanners is preferable to use?

•Ring

47. Babbit metal is used to make ?

•bearing surfaces

48. Accidental ground in a shipboard electrical system must be repaired as soon as possible as they will

•damage insulation and may cause severe severe outages

49. In measuring the clearances between the main engine bearings and the crankshaft, which of these materials is commonly applied?

•Plasti-gauge

50. What is the workpiece motion and tool motion respectively in a horizontal boring machine?

•Stationary and rotational with translation

51. For greater accuracy, some micrometers have a vernier scale making it possible to read in incriments of ?

•ten thousands of an inch

52. The dead center of a lathe can be used only after the end of the work piece.How does the lathe hold the workpiece ?

•center drill

53. For safety of the piping systems, what characteristic of gasket is most advisable to use?

•Can withstand fluid temperature and chemically stable with the fluid used

54. Which one of the following files types are always Mill files?

•single cut

55. To prevent vibration damage to the fuel supply line of a diesel engine, you may use:

•a length of approved flexible nonmetallic hose

56. When steel, cast iron, or other metals with surface scale are being turned, what roughing cut should be taken first?

•Get under the scale deep enough.

57. As per regulations permit to repairs the boiler safety valves while installed on a main propulsion boiler and may be made by.

•the chief engineer in an emergency

58. Pipe threads are made of what tools are you use?

•File a nick where the cut is to be sterted

59. Which of the following metal material has the lowest cutting speed for an effective rough cutting operation if a high-speed cutter is to be used in the modern milling machine onboard?

•carbon steel

60. Copper gaskets are usually annealed by heating to red hot cherry and should be ?

•cooled slowly in air

61. If a centrifugal pumps delivers insufficient discharge pressure due to worn wear rings, what corrective action is called for?

•Replace the rings

62. Tapping threads into a blind hole should be finished by using a:

•bottoming tap

63. Which of the following process of annealing copper plates that are used for gaskets?

•By Heating cherry red hot and cooling slowly in air

64. A side from welding, the best material to use in bonding pipes carrying low temperature liquids or fluids is

•epoxy resin

65. Which compound gauge measures pressure indicated on both high and low on outside pressure?

•Atmospheric pressure,

66. What is the cause of a bluish smoke observed in the exhaust of an operating diesel engine?

•A scored cylinder liner

67. What is the primary use of a soft-faced hammer or mallet?

•For striking a surface without causing damage

68. How would you checked the alignment of coupling faces ?

•inserting a feeler gage to different points of the coupling,

69. Which drill size would you use to machine and tap a 3/4 -10 National Coarse internal thread?

•21/32 inches

70. Which of the following characteristics is true relative to meshing with corrosion protection oils, as the resultant mixture ?

•the gear of largeer diameter will rotate at a slower RPM

71. Which of the following metal material has the lowest cutting speed for an effective rough cutting operation if a high-speed cutter is to be used in the modern milling machine onboard ?

•Carbon steel

72. When it necessary to open a refrigeration system for repairs and the system will be open for more than a few minutes, the open ends of the system should be

•plugged

73. What safety precautions should be done changing the spindle speeds on a lathe machine?

•Stop the lathe operation

74. If a drill press is used to completely bore through a metal plate, feed pressure on the drill bit should be eased as the bit braks through the bottom of the hole to prevent

•the drill bit from jamming and spinning the workpiece

75. Small leaks in gaskets should be stopped immediately after installation because

•the leak will probably worsen in time

76. Which one of the following chisels should be used for cutting oil grooves?

•Round nose

77. Packing rings installed on auxiliary turbines are lubricated by

•moisture in the turbine steam

78. The number of screw threads per inch for a Standard National Coarse 1/2 inch bolt is:

•13

79. Which of the following kind of metal is ductile and maleable that can be ccorroded by air or water ?

•aluminum

80. Used to reduce cargo pump leakage to the pump room bilge of a tanker ship is the

•Mechanical Seals

81. Sealing lines provide sealing liquid flow to the stuffing box of a centrifugal pump.

•to cool the shaft

82. The loop seal connected to the main condenser returns the drains from the

•intercondenser

83. A diesel engine fails to start due to excessive water in the fuel. Which items on the list where the water should removed before the engine can be started ?

•fuel lines

84. To repair or replace defective diesel engine high pressure fuel pipe it must be of the same length and diameter as the original piping.

•maintain specified injection characteristics

85. Which of the files listed can be used for sharpening a tool?

•A single cut file.

86. Which of the fittings should be used for installation of piping to permit removal of the pump for servicing?

•Union

87. The best method of fixing a winch motor bearing of the sealed type tha is running hot is to

•replace the bearing with a new one

88. The gasket and the broken studs have been replaced on a tank manhole cover. Which of the following methods is satisfactory for testing the repai?

•Host test the repaired area with a minimum of 100 psig water pressure?

89. Gland sealing steam is used during steam turbine operation to prevent the loss of

•vacuum

90. If the capacity of a centrifugal pump decreases gradually over a long period of time, you should replace the

•wearing rings

competence 4.1

competence 4.1

competence 4.2

competence 4.2

ERNO ENRIQUE JOMENTO · 4回閲覧 · 50問 · 1年前

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competence 4.4

competence 4.5

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competence 4.6

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competence 4.7

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competence 5.2

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competence 6.2

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competence 8.4

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