單項選擇題

A compound gage is used to measure （）.

A.temperature and pressure
B.humidity and temperature
C.pressure and vacuum
D.pressure and humidity

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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%

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

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