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
Gas masks（）.
Control valves of a CO2 system may be located within the protected space when（）.
Good housekeeping on a vessel prevents fires by（）.
Fixed CO2 systems would not be used on crew’s quarters or（）.
High-velocity fog（）.
Fire extinguishers on inspected vessels are numbered by size I through V，with I being（）.
CO2 cylinders，which protect the small space in which they are stored must（）.
Foam extinguishes a fire by（）.
Fire fighting equipment requirements for a particular vessel may be found on the（）.
How does foam extinguish an oil fire?（）.