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問題一覧
1
91. What is the end of shaft condition before the maintenance repair is carried out?
•Chamfered
2
92. What machine which can flatter surface on horizontal, vertical or angular plane?
•shaper machine
3
93. To prevent overheating and scoring of the shaft after repacking the stuffing box, which of the following procedures should be carried out ?
•Tighten the packing in small increments while the pump is operating
4
94. When renewing sections of pipe in a hydraulic system, it should always indicate the nominal pipe size of the piping?
•size for threaded connections
5
95. To repair a small electrical motor that has been submerged in salt water, you should,
•Wash it with fresh water and apply an externalsource of heat
6
96. What saw is more suitable for cutting metal in tight quarters ?
•Stab saw
7
97. Which of the listed tools should be used to remove a tapered roller bearing from a shaft?
•An arbor press
8
98. What kind of non-metallic mineral material which can withstand very high temperature and unaffected by steam petrol, paraffin, fuel, oil and lubricants?
•Asbestos
9
99. Which of the following sensing device in a pressure gauge using the Bourdon principle?
•Metal tube
10
100. After using a pipe cutter to cut a piece of pipe, the inside edge of the pipe should be
•deburred with a pipe reamer
11
101. What do you call that instrument use to take misalignment of the crankshaft?
•Deflection gauge
12
102. The lower water seal on a diesel engine wet cylinder liner must allow for liner expansion and contraction. This seal is most commonly a
•neoprene O-ring
13
103. What procedure must be formed before doing any maintenance on a hydraulic system, i.e. there is still stored energy in the accumulator?
•Bleed off the energy stored in the accumulator .
14
104. What is the purpose of improving the characteristics of a metal, especially steel, by heating it to a high temperature, though below the melting point, then cooling it, usually in air ?
•tempering
15
105. When the object you are cutting using a hand hacksaw is about to separate, how should you handle the hand hacksaw?
•Reduce cutting speed and pressure.
16
106. Safety valve gags should only be installed hand tight in order to prevent:
•bending of the valve stem
17
107. What is commonly used by a machinist and repairman in fixing files with coarsely teeth?
•Bastard cut
18
108. When saw blades are fixed in hand-held hacksaw frame,which of the following can move forward and reverse stroke?
•Rod
19
109. Which non-ferous alloy is most commonly used for heat exchanger tubes and possesses a high resistance to corrosion ?
•copper nickel
20
110. Which of the listed devices could be used as a ring groove cleaning tool during preparation for the installation of new rings if a piston ring cleaning tool was not available?
•A section of the removed compression ring
21
111. What should you avoid increased pressure on a drill as the drill point begins to break through the bottom of the work piece?
•Determine the exerted pressure by watching the pressure gauge
22
112. wHich one of the list should a flat chisel is the proper tools used for cutting?
•flat stock
23
113. Tubing is sized by:
•nominal outside diameter
24
114. Which of the listed metals can usually be drilled without lubrication ?
•brass
25
115. Which of the following process will a hacksaw blade start a cut more easily ?
•file a eick where the cut is to be started
26
116. Which of the following method listed would be most effective in repairing a steam cut on a seating surface of a super heater hand hole plate?
•Filling the cut by welding and then grinding it smooth
27
117. A pump shaft that is bent or distorted should normally.
•replaced with satisfactory spare
28
118. A hard brittle substance that are insoluble in water is called ?
•resin
29
119. Which of the following files having coarsely spaced teeth?
•Bastard cut
30
120. Why should two pipe joints be properly align before being connected?
•Misalignment of the joints will result to excessive
31
121. The drill size is marked on the ?
•shank
32
122. Low pressure steam is used to keep air from leaking into turbine casing along the turbine shaft. For this purpose, which of the following steam systems is used?
•Gland sealing steam system
33
123. What tool is mainly used in cutting metals?
•Hacksawing
34
124. Which of the following is the propertyof a material that enables it to resist strain when stress is applied?
•Strength
35
125. When drilling hole in a piece of work chuked in a lathe, where does you should mount the drill chuck?
•tailstock
36
126. In electric arc welding, what purpose does the electrode coating serve? .
•it provided a gas shield
37
127. This method is used for joining sheet metal and for attaching studs, rods and busses, etc., to plates
•resistance welding
38
128. Which of these metals can be drilled without lubrication ?
•brass
39
129. When tightening the nozzle nut of fuel injector , which of the following tools is used?
•Torque Wrench
40
130. If you suspect that a gage is sticking and giving an inccurate reading, you should
•replace the gage or have it calibrated
41
131. In general practice, which one makes common measurement on circular and curved surfaces in machine shops?
•spherical
42
132. Heat damage to fuel injection nozzles on small high-speed diesel engines can be prevented by_
•ensuring good metallic contact between nozzles and cylinder heads
43
133. A crack, located in the shell plating or deck plating of a ship, may be temporarily weld repair from increasing in length by.
•drilling a hole at each end of the crack and weld
44
134. In certain cases, a cylinder liner can be refinished rather than replaced. When properly honed, the
•liner surface should have a crosshatch pattern
45
135. Which one of the following measured with a pyrometer?
•Temperature