A.As pressure decreases, volume increases
B.As volume increases, pressure increases
C.As volume decreases, pressure decreases
D.As pressure increases, volume increases
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A.readjust the relief valve
B.throttle the suction line
C.throttle the discharge valve
D.open the priming line
A.transmitter at the steering station and a receiver at the steering engine
B.reversible motor at the steering station geared to the steering pumps
C.small induction motor on the bridge which controls the redder through pulleys
D.variable displacement hydraulic pump driven by a reversible DC motor
A.Distiller air ejector cooling medium
B.Saltwater heater discharge
C.First-stage internal feed box
D.Second-stage internal feed box
A.condenser
B.vapor generator
C.accumulator
D.evaporator
A.expansion valve to the compressor
B.receiver to the expansion coil
C.expansion valve to the evaporator
D.condenser to the expansion valve
最新試題
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 （）.
Thermostatic expansion valves can be adjusted for （）.
Which of the listed pumps is NOT a positive displacement pump?（）
Which of the problems listed would came the discharge temperature of an R-12 refrigeration compressor to increase?（）
When a refrigeration compressor has developed a high head pressure as a result of a refrigerant overcharge, you should （）.
The output volume of a positive fixed displacement pump can be changed only by （）.
A grease gun is generally used to lubricate a （）.