A.Manual fire detection system B.Automatic fire detection system C.Smoke detection system D.Watchman's supervisory system
单项选择题Which extinguishing agent is the best for use on electrical fires?()
A.Foam B.CO2 C.Dry chemical D.Water fog
单项选择题Which extinguishing agent is recommended in the Chemical Data Guide for use on a carbon disulfide fire?()
A.Alcohol foam B.Dry chemical C.Chemical foam D.Water fog
单项选择题Which extinguishing agent is NOT recommended in the Chemical Data Guide for use on a cyclohexane fire?()
A.Foam B.Carbon dioxide C.Dry chemical D.Water fog
单项选择题Which extinguishing agent is most effective on a mattress fire?()
A.CO2 B.Foam C.Dry Chemical D.Water
单项选择题Which extinguishing agent is effective in combating an isoprene fire?()
A.Dry chemicals B.CO2 C.Foam D.All the above