单项选择题
Which is a disadvantage of Halon as a fire extinguishing medium?（）
A.Conducts electricity
B.Difficult to store
C.Large volume necessary to be effective
D.Ineffective in powdered metal fires
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相关考题
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单项选择题
Which firefighting method is an example of an indirect attack on a fire?（）.
A.Bouncing a straight stream of water off the overhead to create spray effect
B.Spraying foam on a bulkhead and letting it flow down and over a pool of burning oil
C.Flooding a paint locker with CO2 and sealing the compartment
D.Cooling adjacent bulkheads with water to prevent the spread of the fire by conduction -
单项选择题
Which fire extinguishing agent has the greatest capacity for absorbing heat?（）
A.Water
B.Foam
C.Dry chemical
D.Carbon Dioxide -
单项选择题
Which fire extinguishing agent can NOT be used on an ethylenediamine?（）
A.Water foam
B.Dry chemical powder
C.Water fog
D.Alcohol foam
