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單項選擇題

Usually, emergency electricity supplies to on board（）

A.Cargo winch
B.Windlass
C.Steering gear
D.Main air compressor

單項選擇題

Before doing any work on a hydraulic system equipped with accumulators, you should（）

A.drain the accumulators and purge with oxygen
B.bleed off all stored energy from the accumulators completely
C.charge the accumulators to prevent system energy loss
D.pump the hydraulic fluid into the accumulators to prevent fluid loss

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The seven segment arrangement for numerical(數(shù)字的) display on consoles, test meters and other applications can be either（）

你可能感興趣的試題

Usually, emergency electricity supplies to on board（）

Before doing any work on a hydraulic system equipped with accumulators, you should（）

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