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
The amount of fluid friction or internal friction inherent in a mineral lubricating oil is reflected as a measure of its （）.
The rate of heat transfer between the hot and cold fluids passing through a shell-and-tube type heat exchanger will （）.
Which of the following problems could cause the high pressure cutout switch to shut down the compressor in a refrigeration system?（）
An internal bypass is provided on some hydraulic system suction strainers to help reduce the possibility of （）.
The temperature differential occurring between the inlet temperature of the fluid to be cooled and the outlet temperature of the cooling medium in a shell-and-tube heat exchanger is greatest in which of the flow designs listed?（）
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 general purpose of a heat exchanger is to （）.
A salinity indicator is used to determine the （）.
One cause of high head pressure occurring in a refrigeration system can be （）.