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單項(xiàng)選擇題

Tube leaks in the distillate cooler of a two stage flash evaporator will result in （）.

A.loss of second stage vacuum
B.contamination of the distillate
C.lower feed inlet temperature
D.contamination of the second stage condenser

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單項(xiàng)選擇題

The pressure of a liquid leaving the pump can be referred to as the （）.

A.total head
B.discharge head
C.net positive suction head
D.suction head

單項(xiàng)選擇題

The delivery rate of a variable stroke axial piston hydraulic pump is controlled by varying the position of the （）.

A.slide block
B.tilting box
C.pintle
D.reaction ring