A.flow of oil
B.pressure of oil
C.A and B
D.temperature of oil
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A.Relief valves
B.Check valves
C.Safety valves
D.Reducing valve
A.Hydraulic pumps
B.Valve
C.Hydraulic cylinders
D.Hydraulic motors
A.The hydraulic pumps
B.Valves
C.Hydraulic cylinders
D.Hydraulic motors
A.cast
B.put
C.hold
D.let out
A.Cargo winches
B.Mooring winches
C.Windlasses
D.Cargo hatches
最新試題
The output volume of a positive fixed displacement pump can be changed only by ().
On tank vessels equipped with power operated cargo tank valves, the type of power operator most commonly used is ().
An increasing head pressure in a refrigeration system, without any corresponding change in the cooling water inlet temperature, would probably be caused by ().
The rate of heat transfer from a hot region to a cold region is affected most by the ().
The usual symptoms of cavitation in a centrifugal pump is ().
If you are given the job of adding hydraulic fluid to a mooring winch, and are not certain as to the type of fluid to use, you should ().
If the relief valve on the discharge side of a hydraulic pump lifts, the cause could be ().
Heavy wear in a particular area of the inner circumference of a packing ring may be caused by ().
A salinity indicator is used to determine the ().
Which of the following problems could cause the high pressure cutout switch to shut down the compressor in a refrigeration system?()