單項(xiàng)選擇題

The expansion valve on a Freon system controls the （）.

A.superheat of the gas leaving the compressor
B.back pressure in the evaporator
C.temperature of the icebox
D.superheat of the gas leaving the evaporator

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單項(xiàng)選擇題

During working, thermostatic expansion valve should be （）.

A.either all the way open or all the way closed
B.normally fully open
C.throttled depending on load
D.controlled by liquefied pressure

單項(xiàng)選擇題

When the temperature of the refrigerant flowing out from the condenser is below the condensing temperature, it is said to be （）.

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

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The expansion valve on a Freon system controls the （）.

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During working, thermostatic expansion valve should be （）.

When the temperature of the refrigerant flowing out from the condenser is below the condensing temperature, it is said to be （）.