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
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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
A.smothering the burning material
B.chemical combination with burning material
C.absorbing the burning material
D.organic destruction of the burning material
最新試題
Fire extinguishers on inspected vessels are numbered by size I through V，with I being（）.
Foam extinguishes a fire by（）.
Foam is a very effective smothering agent and（）.
CO2 cylinders equipped with pressure actuated discharge heads will discharge automatically when（）.
Except in rare cases，it is impossible to extinguish a shipboard fire by（）.
Foam extinguishes a fire mainly by（）.
Halon extinguishes fire primarily by（）.
Fire may be spread by which means?（）.
Generally，the first action in extinguishing an LFG fire caused by escaping gas is to（）.
Good housekeeping on a vessel prevents fires by（）.