單項選擇題

It is important with all hydraulic systems to ensure that interlocking arrangements provided for pump or motor control levers are （） before the pump driving motor can be started.

A.in the pert position
B.in the starboard position
C.in the neutral position
D.to be dismantled

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單項選擇題

Overload protection on hydraulic system is provided by the use of （）.

A.stop valves
B.pressure relief valves
C.balance valves
D.regulating speed valves

單項選擇題

The most common forms of main drive used on deck auxiliaries are （）.

A.steam plants, electric motors and compressed air
B.diesel engine, hydraulic machinery and compressed air
C.steam plants, electric motors and hydraulic machinery
D.diesel engines, steam plants and hydraulic machinery