A.The hydraulic pumps
B.Valves
C.Hydraulic cylinders
D.Hydraulic motors
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A.cast
B.put
C.hold
D.let out
A.Cargo winches
B.Mooring winches
C.Windlasses
D.Cargo hatches
A.lift
B.put
C.take
D.hold
A.Cargo winches
B.Mooring winches
C.Windlasses
D.Cargo hatches
A.hydraulic pumps
B.valves
C.hydraulic cylinders
D.hydraulic motors
最新試題
Which of the following statements is correct concerning heat transfer?（）
Which of the following problems could cause the high pressure cutout switch to shut down the compressor in a refrigeration system?（）
Which of the listed pumps is NOT a positive displacement pump?（）
Pitting in the suction areas of a centrifugal pump bronze impeller is usually caused by （）.
Which of the problems listed would came the discharge temperature of an R-12 refrigeration compressor to increase?（）
Heavy wear in a particular area of the inner circumference of a packing ring may be caused by （）.
An increasing head pressure in a refrigeration system, without any corresponding change in the cooling water inlet temperature, would probably be caused by （）.
Thermostatic expansion valves can be adjusted for （）.
If the suction pressure at the refrigeration compressor is below normal, the cause can be（）.
A grease gun is generally used to lubricate a （）.