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單項選擇題

A fluid coil will （） large quantifies of heat when it changes state from a liquid to a vapor.

A.release
B.absorb
C.develop
D.regenerate

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單項選擇題

What is the substance called which can readily be converted from a liquid into a vapor, and also from a vapor into liquid with a reasonably narrow range of pressure?（）

A.Refrigerator
B.Refrigerant
C.Cooling medium
D.Brine

單項選擇題

In a refrigeration plant the （） need defrosting.

A.fan
B.compressor
C.condenser
D.evaporator

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