A.lift
B.put
C.take
D.hold
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A.Cargo winches
B.Mooring winches
C.Windlasses
D.Cargo hatches
A.hydraulic pumps
B.valves
C.hydraulic cylinders
D.hydraulic motors
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
最新試題
If the suction pressure at the refrigeration compressor is below normal, the cause can be（）.
Thermostatic expansion valves can be adjusted for （）.
Which of the following problems could cause the high pressure cutout switch to shut down the compressor in a refrigeration system?（）
On tank vessels equipped with power operated cargo tank valves, the type of power operator most commonly used is （）.
The control mode in which the final control element is moved from one of two flexed positions to the other is known as （）.
An internal bypass is provided on some hydraulic system suction strainers to help reduce the possibility of （）.
A pressure drop through the refrigerant liquid line may cause （）.
The general purpose of a heat exchanger is to （）.
Which of the following statements is correct concerning heat transfer?（）
An increasing head pressure in a refrigeration system, without any corresponding change in the cooling water inlet temperature, would probably be caused by （）.