单项选择题
The effect of high vapor superheat in a refrigeration system, is a/an （）.
A.increased capacity of the compressor
B.more efficient operation of the thermal expansion valve
C.decreased capacity of the compressor
D.loss of receiver capacity
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相关考题
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单项选择题
A dirty intercooler on an air compressor will cause （）.
A.damage to the un-loader operating diaphragm
B.an increase in current flow to the motor
C.high pressure in the receiver and filter
D.an excessive consumption of crankcase oil -
单项选择题
Under normal operating conditions, the highest temperature and pressure conditions existing in a flash-type evaporator will occur in the （）.
A.first stage
B.second stage
C.distillate cooler
D.salt water feed heater -
单项选择题
Which of the listed conditions will cause the feed water that has not flashed to vapor in the first-stage of a flash evaporator, to flow into the second-stage?（）
A.Gravity siphon effect
B.Higher vacuum in the second-stage
C.Difference in brine density between first and second stages
D.lower pressure in first-stage
