单项选择题
A.mixed-flow pump B.axial-flow pump C.centrifugal pump D.displacement pump
Sediment collects in a tubular purifier （）.A.on top cov...
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
In an oil cooler circulated by sea water, the oil is at...
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
In （）, hot diesel engine jacket water passes over the s...
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
