A.It is inflated by a small CO2 bottle that is automatically tripped when the front zipper is at the top of the zipper track
B.It is inflated by a small CO2 bottle that is manually tripped
C.It is inflated by blowing through an inflation tube
D.It inflates by sea water bleeding into the flotation bladder and reacting with a chemical therein
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A.By cooling the oil below the ignition temperature
B.By removing the fuel source from the fire
C.By excluding the oxygen from the fire
D.By increasing the weight of the oil
A.Point the horn down
B.Turn cylinder upside-down
C.Break the rupture disc
D.Pull pin，squeeze grip
A.is a finer，more diffuse water spray than low-velocity fog
B.requires that the water pressure be no greater than 60 psi
C.produces an effective fog pattern no more than 6 feet beyond the nozzle
D.extinguishes a fire by absorbing heat and reducing the supply of oxygen
A.at the top of the flames
B.at the base of the fire near the edge
C.in short quick bursts
D.toward the upwind side of the fire
A.Fires in electrical equipment
B.Flammable oils and greases
C.Class A fires in ordinary combustibles
D.Materials containing their own oxygen
最新試題
Fire extinguishing agents used on Class C fires must be（）.
Fire fighting equipment requirements for a particular vessel may be found on the（）.
How is the external flotation bladder of an immersion suit inflated?（）
Foam extinguishes a fire by（）.
High-velocity fog（）.
Control valves of a CO2 system may be located within the protected space when（）.
How do you operate a portable CO2 fire extinguisher?（）.
Fire and abandon ship stations and duties may be found on the（）.
Firefighting foam is only effective when the foam（）.
Generally，the first action in extinguishing an LFG fire caused by escaping gas is to（）.