單項(xiàng)選擇題

The purpose of the refrigeration system low pressure cutout switch is to （）

A.protect the compressor from liquid flood back
B.protect the compressor from low discharge pressure
C.start and stop the compressor upon system demand
D.start the compressor after a drop in the evaporator pressure

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單項(xiàng)選擇題

A pressure drop in the liquid line of a refrigeration system may cause（）

A.the solenoid valve to seize
B.the compressor to hunt
C.flash gas to form in the liquid line
D.the expansion valve to freeze open

單項(xiàng)選擇題

In a direct expansion type multi-box refrigeration system, the compressor is set up to cycle on and off by the（）

A.pressurestat
B.high pressure cutout
C.solenoid valve
D.low pressure cutout switch

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The purpose of the refrigeration system low pressure cutout switch is to （）

你可能感興趣的試題

A pressure drop in the liquid line of a refrigeration system may cause（）

In a direct expansion type multi-box refrigeration system, the compressor is set up to cycle on and off by the（）