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單項選擇題

A centrifugal pump attempting to develop flow against a closed discharge valve has a/an （）.

A.capacity of 0%
B.efficiency of 100%
C.internal slippage of 0%
D.shut off horsepower rating of 100%

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單項選擇題

Condensate formed within the first-effect tube nest of a double-effect,low pressure evaporator, is removed by a （）.

A.series of baffles
B.crossover pipe
C.condensate separator
D.drain pump

單項選擇題

The temperature of a refrigerant gas is the highest （）.

A.at the compressor discharge
B.at the compressor suction
C.in the expansion valve
D.in the receiver