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單項選擇題

The component of a refrigerating system in which the refrigerant vaporizes and absorbs heat is known as the （）.

A.condenser
B.vapor generator
C.accumulator
D.evaporator

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單項選擇題
The low pressure side of a refrigeration system is considered to exist from the （）.
A.expansion valve to the compressor
B.receiver to the expansion coil
C.expansion valve to the evaporator
D.condenser to the expansion valve
單項選擇題
If the electric motor driving an air compressor fails to start, the cause may be a （）.
A.leaking unloader
B.tripped circuit breaker
C.control line leak
D.defective pop valve