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單項(xiàng)選擇題

The drive motor will have a brake arranged to fail-safe, ieit will （） the load if power fails or machine is stopped.

A.lift
B.put
C.take
D.hold

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單項(xiàng)選擇題

（） are used to handle anchors and chains.

A.Cargo winches
B.Mooring winches
C.Windlasses
D.Cargo hatches

單項(xiàng)選擇題

Among the basic categories of equipment, which of the following are used to allow the hydraulic energy to be controlled?（）

A.hydraulic pumps
B.valves
C.hydraulic cylinders
D.hydraulic motors

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