A.hydraulic pumps
B.valves
C.hydraulic cylinders
D.hydraulic motors
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A.Cranes
B.Mooring winches
C.Windlasses
D.Foreman
A.stop valves
B.check valves
C.safety valves
D.reducing valves
A.an electric motor
B.a diesel engine
C.a compressor
D.oil
A.large size of oil globule
B.low temperature
C.high viscosity
D.high flow rate
A.with dirty water
B.with clean water
C.by oily water
D.by mixed water
最新試題
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 （）.
The rate of heat transfer from a hot region to a cold region is affected most by the （）.
When the steering gear is in operation, you should （）.
If the suction pressure at the refrigeration compressor is below normal, the cause can be（）.
The usual symptoms of cavitation in a centrifugal pump is （）.
A salinity indicator is used to determine the （）.
If the head pressure of a reciprocating refrigeration compressor is excessive, （）.
A gradual decrease in the discharge pressure of an operating hydraulic pump can be caused by （）.
An internal bypass is provided on some hydraulic system suction strainers to help reduce the possibility of （）.