A.sub-cooled liquid
B.high temperature liquid
C.oil saturated liquid
D.superheated vapor
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A.Reciprocating
B.Centrifugal
C.Rotary
D.Gear
A.change in the impeller diameter
B.square of the impeller radius
C.cube of the impeller diameter
D.impeller efficiency for large changes in its size
A.As pressure decreases, volume increases
B.As volume increases, pressure increases
C.As volume decreases, pressure decreases
D.As pressure increases, volume increases
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
A.leaking unloader
B.tripped circuit breaker
C.control line leak
D.defective pop valve
A.superheated
B.saturated
C.dense
D.flooded
最新试题
The major source of chemical contaminants in hydraulic fluid is ().
Who is responsible for ensuring that someone is assigned to close the watertight doors in an emergency?()
An internal bypass is provided on some hydraulic system suction strainers to help reduce the possibility of ().
When a refrigeration compressor has developed a high head pressure as a result of a refrigerant overcharge, you should ().
If the relief valve on the discharge side of a hydraulic pump lifts, the cause could be ().
Which of the following problems could cause the high pressure cutout switch to shut down the compressor in a refrigeration system?()
The usual symptoms of cavitation in a centrifugal pump is ().
An excessive charge of refrigerant in an air-cooled refrigeration system can cause ().
The amount of fluid friction or internal friction inherent in a mineral lubricating oil is reflected as a measure of its ().
A gradual decrease in the discharge pressure of an operating hydraulic pump can be caused by ().