A.decrease
B.increase
C.decrease to zero
D.remain unchanged
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A.purge lube oil from the liquid refrigerant
B.recover water purged from the system
C.separate foul gases from the receiver
D.purge non-condensable gases without losing refrigerant
A.chilled water temperature
B.dew point temperature
C.primary air temperature
D.dry bulb temperature
A.A room thermostat activates an electric heater at each individual chilled air outlet when necessary
B.Varying the number of passes the air makes across the coils
C.Varying the temperature of the water through the coils
D.Varying the quantity of water flowing through the coils
A.increase
B.decrease
C.remain unchanged
D.be greatest at dew point
A.changing the air filter
B.recharging the system
C.changing compressor lubricant
D.renewing container vacuum
最新試題
During the diesel engine running, the water level of F.W expansion tank should normally kept in the （） level of glass tube.
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