单项选择题
Which of the following statements is correct relative to distillation plant operation?()
A.Distillation is the process of boiling seawater to produce vapor which is condensed into fresh water
B.Evaporation is the second part of the distillation process where brine is removed
C.Brine is the result of condensed sea water vapor
D.Distillate is the product resulting from the evaporation of fresh water vapor
相关考题
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单项选择题
The amount of moisture in a given sample of air, when compared with the amount of moisture the air could hold if totally saturated at the existing temperature of the sample, is called ().
A.absolute humidity
B.specific humidity
C.effective humidity
D.relative humidity -
单项选择题
The purpose of an air compressor unloading device is to ()
A.drain water from the air receiver
B.drain water from the cylinders
C.delay the compression process until the motor is up to speed
D.check pump alignment -
单项选择题
Personnel working with refrigeration systems, and subject to the exposure of refrigerants should wear ().
A.face shield
B.a respirator
C.rubber gloves
D.an all purpose gas mask
