A.fouled tubes in shell and tube condenser
B.too little or too warm condenser water
C.air or non-condensable gas in system
D.overcharge of refrigerant
您可能感興趣的試卷
你可能感興趣的試題
A.The winch motor
B.The band brake
C.The winch barrel
D.The anchor capstan
A.The cable lifter
B.The hoisting motor
C.The topping wire
D.The life-raft
A.stays
B.winches
C.barrels
D.brakes
A.fire-tubes
B.furnaces
C.water drums
D.water wall tubes
A.The three moving vanes and the three fixed vanes form three pressure chambers
B.The three moving vanes and the three fixed vanes form six pressure chambers
C.The three moving vanes and the three fixed vanes form nine pressure chambers
D.The three moving vanes and the three fixed vanes form twelve pressure chambers
最新試題
The rate of heat transfer between the hot and cold fluids passing through a shell-and-tube type heat exchanger will （）.
The general purpose of a heat exchanger is to （）.
If the thermal bulb of an expansion valve is incorrectly placed at the center of the coil instead of the end, it will （）.
A salinity indicator is used to determine the （）.
Low compressor head pressure in a refrigeration system can be caused by（）.
An excessive charge of refrigerant in an air-cooled refrigeration system can cause （）.
A gradual decrease in the discharge pressure of an operating hydraulic pump can be caused by （）.
Which of the following statements is correct concerning heat transfer?（）
If the relief valve on the discharge side of a hydraulic pump lifts, the cause could be （）.
An internal bypass is provided on some hydraulic system suction strainers to help reduce the possibility of （）.