A.salt water and a wire brush
B.caustic soap
C.mild soap and fresh water
D.a holystone
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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
最新試題
Halon extinguishers used on a class C fire should be directed at the（）.
Gas masks（）.
Halon extinguishes a fire by（）.
CO2 cylinders equipped with pressure actuated discharge heads will discharge automatically when（）.
Fire hose should be washed with（）.
Halon extinguishes fire primarily by（）.
Firefighting foam is only effective when the foam（）.
Fire and abandon ship stations and duties may be found on the（）.
Fixed CO2 systems would not be used on crew’s quarters or（）.
How is the external flotation bladder of an immersion suit inflated?（）