A.gasket
B.packing
C.washer
D.spring
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A.Wear
B.Contaminating
C.Coalescence
D.Coarse separating
A.non-pulsating
B.pulsating
C.positive
D.non-positive
A.injection valve
B.relief valve
C.discharge valve
D.inlet filter
A.gear
B.vane
C.screw
D.centrifugal
A.low pressure
B.low discharge
C.low speed
D.high pressure
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 （）.
Thermostatic expansion valves can be adjusted for （）.
Heavy wear in a particular area of the inner circumference of a packing ring may be caused by （）.
Which of the following statements is correct concerning heat transfer?（）
If the suction pressure at the refrigeration compressor is below normal, the cause can be（）.
The general purpose of a heat exchanger is to （）.
When a refrigeration compressor has developed a high head pressure as a result of a refrigerant overcharge, you should （）.
A salinity indicator is used to determine the （）.
The output volume of a positive fixed displacement pump can be changed only by （）.
The rate of heat transfer from a hot region to a cold region is affected most by the （）.