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單項(xiàng)選擇題

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

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單項(xiàng)選擇題

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

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

單項(xiàng)選擇題

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

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