A.either all the way open or all the way closed
B.normally fully open
C.throttled depending on load
D.controlled by liquefied pressure
您可能感興趣的試卷
你可能感興趣的試題
A.dry
B.wet
C.super-cooled
D.superheated
A.compressor
B.cooling coils
C.condenser
D.receiver
A.condenser；evaporator
B.evaporator；compressor
C.compressor；condenser
D.None of the above
A.compressor
B.condenser
C.evaporator
D.expansion valve
A.latent heat of fusion
B.latent heat of vaporization
C.specific heat of vaporization
D.latent heat of the gas
最新試題
Which of the problems listed would came the discharge temperature of an R-12 refrigeration compressor to increase?（）
An increasing head pressure in a refrigeration system, without any corresponding change in the cooling water inlet temperature, would probably be caused by （）.
An internal bypass is provided on some hydraulic system suction strainers to help reduce the possibility of （）.
Pitting in the suction areas of a centrifugal pump bronze impeller is usually 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 （）.
If the suction pressure at the refrigeration compressor is below normal, the cause can be（）.
When the steering gear is in operation, you should （）.
If the relief valve on the discharge side of a hydraulic pump lifts, the cause could be （）.
If the viscosity of the liquid being transferred remains constant as the discharge pressure increases, the rotary pump （）.
Which of the following statements is correct concerning heat transfer?（）