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
The BEST method of applying foam to a fire is to（）.
Operation of the valve control release on a fixed CO2 system must immediately（）.
Regular foam can be used on all but which flammable liquid?（）
The discharge side of every fire pump must be equipped with a（）.
Portable fire extinguishers must be provided for the cargo tank area of an unmanned tank barge（）.
The bilge pump on a fishing vessel（）.
Recharging a previously used cartridge-operated dry-chemical extinguisher is accomplished by（）.
Portable foam type fire extinguishers are most effective on（）.
The collision bulkhead shall be of（）.
The blocking or absence of fire dampers can cause（）.