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
Good housekeeping on a vessel prevents fires by（）.
Halon from extinguishers used on a class B fire，should be directed（）.
Foam-type portable fire extinguishers are most useful in combating fires involving（）.
Foam extinguishes a fire mainly by（）.
Foam extinguishes a fire by（）.
Except in rare cases，it is impossible to extinguish a shipboard fire by（）.
Generally，the first action in extinguishing an LFG fire caused by escaping gas is to（）.
How does foam extinguish an oil fire?（）.
Firefighting foam is only effective when the foam（）.
CO2 cylinders，which protect the small space in which they are stored must（）.