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單項(xiàng)選擇題

The condensers located in various stages of a flash evaporator are cooled by（）

A.distillate
B.seawater
C.brine
D.air

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單項(xiàng)選擇題

Which of the diesel engine components listed increase air density and helps to improve engine operating efficiency?（）

A.Impeller
B.Compressor
C.After-cooler
D.Exhaust differ

單項(xiàng)選擇題

By comparing the exhaust gas temperature of each cylinder, the operator can determine if the load is balanced throughout the engine. The device most commonly used is a（）

A.tachometer
B.pyrometer
C.dynamometer
D.calorimeter

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