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 hose couplings（）.
Fire alarm system thermostats are actuated by（）.
Foam extinguishes a fire by（）.
Fire fighting equipment requirements for a particular vessel may be found on the（）.
CO2 cylinders equipped with pressure actuated discharge heads will discharge automatically when（）.
Halon extinguishes fire primarily by（）.
Fire hose should be washed with（）.
Halon from extinguishers used on a class B fire，should be directed（）.
Firefighting foam is only effective when the foam（）.
Fire may be spread by which means?（）.