单项选择题

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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热门 试题

单项选择题
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%

单项选择题
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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