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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

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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

單項選擇題

The saturation temperature of the refrigerant must be （） that required in the evaporator refrigerated space.

A.above
B.below
C.equal to
D.None of the above

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