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單項選擇題

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