單項(xiàng)選擇題

Before the seas get rough, it is a good safety practice to （）.

A.secure loose gear
B.move quickly about the ship
C.increase lighting
D.shutdown auxiliary equipment

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單項(xiàng)選擇題

Which of the fire extinguishers listed is to be weighed annually and sent ashore for recharging if the weight loss exceeds 10% of the weight of a full charge?（）

A.Foam
B.Soda acid
C.Dry chemical
D.Carbon dioxide

單項(xiàng)選擇題

A carbon dioxide fire extinguisher has been partially discharged, and should be immediately （）.

A.tagged and restowed properly in its rack
B.weighed and the charge loss recorded
C.given to the chief engineer for recharging
D.tagged "empty" and stowed separately from charged extinguishers