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單項(xiàng)選擇題

The device, which is installed in the compressor suction line to prevent liquid from entering the compressor when hot gas defrosting, is called a（）

A.re-evaporator
B.receiver
C.dehydrator
D.solenoid

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單項(xiàng)選擇題

The humidity of the atmosphere can be determined by the use of the（）

A.anemometer
B.potentiometer
C.manometer
D.psychrometer

單項(xiàng)選擇題

In a centrifugal Freon refrigeration system, the overall capacity of the system is increased by（）

A.opening more bypass lines
B.opening additional expansion valves
C.adding refrigerant
D.speeding up the machine

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