A.penetrates to the bottom of the fire
B.is kept saturated with low-velocity water fog
C.mixes with the burning fuel oil
D.completely covers the top of the burning liquid
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A.Conduction of heat to adjacent surfaces
B.Direct radiation
C.Convection
D.All of the above
A.closing the compartment except for the ventilators
B.completely closing the compartment
C.leaving the compartment open to the air
D.increasing the air flow to the compartment by blowers
A.salt water and a wire brush
B.caustic soap
C.mild soap and fresh water
D.a holystone
A.are made of bronze，brass，or soft alloy metals
B.should be painted red in order to identify hose lengths
C.are specially hardened to prevent crushing
D.should be greased frequently
A.4Certificate of Inspection
B.Certificate of Seaworthiness
C.Classification Certificate
D.Certificate of Registry
最新試題
Except in rare cases，it is impossible to extinguish a shipboard fire by（）.
Fire extinguishers of sizes III，IV，and V are designated as（）.
Generally，the first action in extinguishing an LFG fire caused by escaping gas is to（）.
How is the external flotation bladder of an immersion suit inflated?（）
Firefighting foam is only effective when the foam（）.
Fire hose couplings（）.
Flame screens are used to（）.
Foam extinguishes a fire by（）.
Halon extinguishers used on a class C fire should be directed at the（）.
Foam extinguishes a fire mainly by（）.