單項(xiàng)選擇題

If the relief valve on the discharge side of a hydraulic pump lifts, the cause could be （）.

A.a low load on the unit
B.a clogged pump suction strainer
C.a blockage in the line between the pump and hydraulic motor
D.the hydraulic motor turning too fast

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單項(xiàng)選擇題

A salinity indicator is used to determine the （）.

A.cause of salt contamination
B.location of salt water contamination
C.chemical makeup of feed-water
D.level of alkalinity in condensate

單項(xiàng)選擇題

If the suction pressure at the refrigeration compressor is below normal, the cause can be（）.

A.refrigerant overcharge
B.overfeeding by the expansion valve
C.a restricted suction strainer
D.due to short cycling of the compressor

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If the relief valve on the discharge side of a hydraulic pump lifts, the cause could be （）.

你可能感興趣的試題

A salinity indicator is used to determine the （）.

If the suction pressure at the refrigeration compressor is below normal, the cause can be（）.

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