單項選擇題How is the external flotation bladder of an immersion suit inflated?（）

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


您可能感興趣的試卷

你可能感興趣的試題

1.單項選擇題How does foam extinguish an oil fire?（）.

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

2.單項選擇題How do you operate a portable CO2 fire extinguisher?（）.

A.Point the horn down
B.Turn cylinder upside-down
C.Break the rupture disc
D.Pull pin，squeeze grip

3.單項選擇題High-velocity fog（）.

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

4.單項選擇題Halon from extinguishers used on a class B fire，should be directed（）.

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

5.單項選擇題Halon fire extinguishers are NOT effective when used on which types of fires?（）

A.Fires in electrical equipment
B.Flammable oils and greases
C.Class A fires in ordinary combustibles
D.Materials containing their own oxygen