A.round out
B.round file
C.reamer
D.hole driller
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A.low temperature hardening
B.case hardening
C.annealing
D.tempering
A.Develop ductility
B.Improve machining qualities
C.Relieves stresses
D.All of the above
A.Dye penetrant
B.Magnetic particle
C.Ultrasonic
D.All of the above
A.and quench it in oil
B.cherry red and quench in water
C.and let it cool slowly in the air
D.and carbonize
A.center drill
B.finish drill
C.broach
D.reamer
最新試題
The treatment of the fuel oils involves storage, heating, filtering and（）
The ISPS Code consists of a mandatory section-Part A, which shows（）
The Port State Control officer may witness a fire drill carried out by the crew assigned to these duties on the（）
If separating effect is not good, which measure should be taken （）
The flash point of a residual fuel oil should be used to determine the highest temperature to which oil may be heated（）
Diesel engine air start system check valves are opened by （）
Using a file without a handle may result in （）
Refrigerant entering the compressor of a refrigeration system should be in which of the following conditions?（）
Cold weather starting of a diesel engine may be made easier by（）
To shut down a diesel engine after it exceeds the set maximum speed，which type of device listed should be used?（）