A.relieve excessive compressor head pressure
B.produce flash gas at the expansion valve
C.reduce flooding of the receiver at low load
D.defrost the evaporator coils
您可能感興趣的試卷
你可能感興趣的試題
A.suction pressure only
B.head pressure only
C.superheat only
D.suction pressure and box temperature
A.stores liquid refrigerant
B.collects non-condensable gases
C.allows refrigerant sub-cooling
D.prevents compressor surging
A.protect the compressor from liquid flood back
B.protect the compressor from low discharge pressure
C.start and stop the compressor upon system demand
D.start the compressor after a drop in the evaporator pressure
A.the solenoid valve to seize
B.the compressor to hunt
C.flash gas to form in the liquid line
D.the expansion valve to freeze open
A.pressurestat
B.high pressure cutout
C.solenoid valve
D.low pressure cutout switch
最新試題
When does auxiliary burner of incinerator put into operation? （）Ⅰ. start incinerator when it is coldⅡ. the sludge for dealing with is littleⅢ. the sludge for dealing with is largeⅣ. the water and impurity in sludge are too muchⅤ. the temperature in incinerator is lowⅥ. dealing with little solid rubbish
Under MARPOL Code the ship to which it applies has to carry （）
The condensers located in various stages of a flash evaporator are cooled by（）
The flash point of a residual fuel oil should be used to determine the highest temperature to which oil may be heated（）
The ISPS Code consists of a mandatory section-Part A, which shows（）
Which of the listed governor characteristics will greatly affect the load sharing relationship between paralleled diesel generators?（）
Using a file without a handle may result in （）
Flame failure in an automatically fired auxiliary boiler can from a/an （）
Cold weather starting of a diesel engine may be made easier by（）
The additional mark （）in the Classification Certificate for Machinery means propulsion apparatus is remotely controlled on the navigating bridge control station, and engine assembly control station is unmanned periodically.