A.sweep flames away with water spray
B.shut off the leak
C.use a chemical foam fire extinguisher
D.call the local fire department
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A.should be worn while fighting a fire
B.can be used in atmospheres deficient in oxygen
C.filter contaminants from air that is to be breathed
D.may be substituted for a self-contained breathing apparatus
A.8the heat of a fire melting the link
B.a break-glass and pull-cable system
C.electrical controls on the bridge
D.a mechanical arm outside the vent duct
A.solid materials such as wood or bales of fiber
B.inflammable liquids
C.electrical equipment
D.metallic solids
A.it provides cooling as a secondary effect
B.works well on extinguishing electrical fires
C.can be used to combat combustible metal fires
D.All of the above
A.cooling
B.chemical action
C.smothering
D.inerting the air
最新試題
Fire hose couplings（）.
Halon from extinguishers used on a class B fire，should be directed（）.
Foam-type portable fire extinguishers are most useful in combating fires involving（）.
Halon extinguishes fire primarily by（）.
Good housekeeping on a vessel prevents fires by（）.
CO2 cylinders，which protect the small space in which they are stored must（）.
Foam extinguishes a fire by（）.
Foam is a very effective smothering agent and（）.
Fusible-link fire dampers are operated by（）.
How does foam extinguish an oil fire?（）.