A.Condenser leakage
B.A shortage of liquid refrigerant
C.Excessive frost on the evaporator
D.Not enough condenser cooling water
您可能感兴趣的试卷
你可能感兴趣的试题
A.high discharge pressure
B.frosting of the crankcase
C.high temperature of the overboard water
D.low suction pressure of compressor
A.upper part of the receiver
B.upper part of the condenser
C.down stream end of the cooling coil
D.outlet end of the condenser
A.icing of the automatic controls
B.embrittlement of some parts of the automatic controls
C.sludge in the lubricating oil
D.all of the above
A.low water level
B.high water level
C.excessively high fuel pressure
D.low oil temperature
A.excessive water in the bilges
B.a clogged suction strainer
C.oil in the bilges
D.All of the above
A.in the store room
B.in the cylinder
C.in the scavenge air box
D.in the water box
A.carry off
B.carry down
C.carry on
D.carry over
A.gravity
B.diameter
C.circumference
D.cylinder
A.displacement
B.weight
C.power
D.capacity
A.should be paved
B.should be cleaned
C.should be dismantled
D.should be welded
最新试题
When a refrigeration compressor has developed a high head pressure as a result of a refrigerant overcharge, you should ().
Thermostatic expansion valves can be adjusted for ().
One cause of high head pressure occurring in a refrigeration system can be ().
If the thermal bulb of an expansion valve is incorrectly placed at the center of the coil instead of the end, it will ().
Which of the following statements is correct concerning heat transfer?()
The control mode in which the final control element is moved from one of two flexed positions to the other is known as ().
If the suction pressure at the refrigeration compressor is below normal, the cause can be().
Which of the following problems could cause the high pressure cutout switch to shut down the compressor in a refrigeration system?()
The rate of heat transfer between the hot and cold fluids passing through a shell-and-tube type heat exchanger will ().
Pitting in the suction areas of a centrifugal pump bronze impeller is usually caused by ().