单项选择题
The （） discharge a nearly constant amount of liquid regardless of pressure.
A.mixed-flow pump
B.axial-flow pump
C.centrifugal pump
D.displacement pump
点击查看答案&解析
相关考题
-
单项选择题
Sediment collects in a tubular purifier （）.
A.on top cover
B.on sides of bowl
C.in drain line on the discs
D.on the discs -
单项选择题
In an oil cooler circulated by sea water, the oil is at a larger pressure the result being that any leak in the cooler will mean a loss of （）.
A.oil
B.sea water
C.refrigerant
D.fresh water -
单项选择题
In （）, hot diesel engine jacket water passes over the stack and heats the sea water passing through the tubes.
A.a flash generator
B.a flash evaporator
C.a vacuum boiling evaporator
D.a boiler
