A.contain flammable fumes
B.protect firefighters from flames
C.prevent flames from entering tanks
D.keep flames and sparks from getting out of an engine's exhaust system
您可能感兴趣的试卷
你可能感兴趣的试题
A.the paint locker
B.spaces open to the atmosphere
C.cargo holds
D.the engine room
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
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
A.able to absorb heat
B.water based
C.nonconducting
D.nontoxic
A.used for electrical fires only
B.the smallest
C.the most accessible
D.the most effective
A.portable
B.semi-portable
C.fixed
D.disposable
最新试题
Foam extinguishes a fire by（）.
CO2 cylinders，which protect the small space in which they are stored must（）.
Foam-type portable fire extinguishers are most useful in combating fires involving（）.
Halon from extinguishers used on a class B fire，should be directed（）.
Fire and abandon ship stations and duties may be found on the（）.
Fusible-link fire dampers are operated by（）.
Fire extinguishers of sizes III，IV，and V are designated as（）.
Halon extinguishes fire primarily by（）.
Gas masks（）.
Halon extinguishers used on a class C fire should be directed at the（）.