單項(xiàng)選擇題Which of the following nondestructive testing methods can be used to detect a suspected subsurface defect in a tail-shaft liner?()

A.Dye penetrant
B.Magnetic particle
C.Ultrasonic
D.All of the above


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1.單項(xiàng)選擇題To anneal a copper gasket, you should heat the gasket()

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

2.單項(xiàng)選擇題A drilled hole is accurately finished to size with a ()

A.center drill
B.finish drill
C.broach
D.reamer

4.單項(xiàng)選擇題Using a file without a handle may result in ()

A.your work becoming rounded
B.injury to your hand
C.overheating of the file
D.pinning

5.單項(xiàng)選擇題Before welding is permitted on a fuel tank, it must be certified or declared ()

A.safe for becoming rounded
B.safe for hot work
C.not safe for personnel
D.not safe for hot work