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單項選擇題

In practice, the refrigerant flow after the evaporator is designed to ensure that the vapor leaving the evaporator is slightly （）.

A.saturated
B.super-cooled
C.wet
D.superheated

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單項選擇題

The refrigerant flows through the evaporator, where it （） heat from the refrigerated space.

A.extracts
B.releases
C.gives no
D.absorbs no

單項選擇題

After passing through the expansion valve the refrigerant should be in the state of （）.

A.vapor
B.liquid
C.solid
D.None of the above is tree

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