A.system was overcharged with refrigerant
B.high pressure switch was improperly adjusted
C.expansion valve strainers were fouled
D.suction valves were leaking slightly
您可能感兴趣的试卷
你可能感兴趣的试题
A.increased pump speed
B.excessive pump discharge pressure
C.too low of a tilting box angle
D.low pump speed
A.Lube oil passing through the system
B.Moisture or foreign matter collecting at the valve seat and orifice
C.Variable spring tension caused by the changing temperature
D.Frost on the liquid line
A.an immediate crankcase explosion
B.oil contamination in the compressed air
C.a decrease in compressor capacity
D.no immediate loss of the compressed air capacity
A.The density of the air entering the compressor
B.The temperature of the air entering the compressor
C.The designed rotating speed of the compressor
D.A leaking head gasket
A.Differential
B.Trunk
C.Barrel
D.Valve-in-head
A.return to a neutral position
B.flood the evaporator
C.open
D.close
A.control air system
B.forced draft air system
C.supply air system
D.ships service air system
A.dehydrated
B.purged
C.plugged
D.evacuated
A.combustion control air system
B.supply air system
C.ships service air system
D.low pressure deck air system
A.dry bulb temperature
B.wet bulb temperature
C.saturation temperature
D.water vapor superheat
最新试题
A pressure drop through the refrigerant liquid line may cause ().
Which of the following statements is correct concerning heat transfer?()
The amount of fluid friction or internal friction inherent in a mineral lubricating oil is reflected as a measure of its ().
An excessive charge of refrigerant in an air-cooled refrigeration system can cause ().
The rate of heat transfer from a hot region to a cold region is affected most by the ().
The major source of chemical contaminants in hydraulic fluid is ().
When the steering gear is in operation, you should ().
Low compressor head pressure in a refrigeration system can be caused by().
The control mode in which the final control element is moved from one of two flexed positions to the other is known as ().
The general purpose of a heat exchanger is to ().