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單項選擇題

To extinguish an electrical fire, you should use （）.

A.mechanical foam
B.chemical foam
C.carbon dioxide
D.soda acid

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單項選擇題

If a CO₂ fire extinguisher is not readily available, which of the listed fire extinguishers would be best suited to combat a small electrical fire in a switchboard?（）

A.Dry chemical
B.Halon
C.Low velocity fog
D.Steam

單項選擇題

You hear the general alarm bells and ships whistle sound for over 10 secondsTraditionally, this is the signal for （）.

A.abandon ship
B.dismissal from drills
C.fire and emergency
D.lower lifeboats

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