A.CO2 does not cool the fire
B.cylinders are regulated pressure vessels
C.C02 is not effective on class B fires
D.C02 is not effective on class C fires
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A.water-tight
B.air-tight
C.fire-tight
D.oil-tight
A.should
B.shall
C.that
D.if
A.casing
B.outer hose
C.line cover
D.jacket
A.refractory
B.the screen wall
C.the water wall
D.fire plate
A.the accumulation of explosive gases
B.faster cooling of the fire
C.the fire to spread through the ventilation system
D.fixed foam systems to be ineffective
最新試題
One advantage of the all-purpose nozzle is that it（）.
The best method of extinguishing a class A fire is to（）.
Radiation spreads a fire by（）.
Small quantities of flammable liquids needed at a work site should be（）.
The collision bulkhead shall be of（）.
Portable foam type fire extinguishers are most effective on（）.
Removing which will extinguish a fire?（）.
One disadvantage of using regular dry chemical (sodium bicarbonate) in firefighting is that（）.
Portable CO2 fire extinguishers should NOT be used to inert a space containing flammable liquids due to the danger of（）.
Overhauling a fire in the living quarters on a vessel must include（）.