单项选择题

Which of the following problems would be the probable cause for the faulty operation of a reciprocating air compressor suction valve?（）

A.Carbon build up in the piston ring belt
B.Faulty operation of a cylinder un-loader
C.Compressor operation in an area of high relative humidity
D.Lifting of intercooler rebel valve

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单项选择题

If a refrigeration crankcase compressor were short cycling on the low pressure cutout switch, the cause might be that the （）.

A.system was overcharged with refrigerant
B.system was low on refrigerant
C.suction valves were leaking slightly
D.relief valve was leaking slightly

单项选择题

Air blowing from the intake air filter of an operating air compressor indicates （）.

A.broken inlet valves
B.broken discharge valves
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D.overloading of the air distribution system

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The part of the anchor windlass that engages the anchor chain for lifting is called the （）.

A.warping head
B.fairlead
C.wildcat
D.capstan