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單項(xiàng)選擇題

Which fire extinguishing agent can NOT be used on an ethylenediamine?（）

A.Water foam
B.Dry chemical powder
C.Water fog
D.Alcohol foam

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單項(xiàng)選擇題

Which fire detection system is actuated by sensing a heat rise in a compartment?（）

A.Manual fire detection system
B.Automatic fire detection system
C.Smoke detection system
D.Watchman's supervisory system

單項(xiàng)選擇題

Which extinguishing agent is the best for use on electrical fires?（）

A.Foam
B.CO₂
C.Dry chemical
D.Water fog

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