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
您可能感興趣的試卷
你可能感興趣的試題
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
A.crewman's duty list
B.Certificate of Inspection
C.shipping articles
D.muster list
最新試題
Control valves of a CO2 system may be located within the protected space when（）.
Halon from extinguishers used on a class B fire，should be directed（）.
Foam is a very effective smothering agent and（）.
Foam-type portable fire extinguishers are most useful in combating fires involving（）.
Fire and abandon ship stations and duties may be found on the（）.
Halon fire extinguishers are NOT effective when used on which types of fires?（）
Firefighting foam is only effective when the foam（）.
Except in rare cases，it is impossible to extinguish a shipboard fire by（）.
CO2 cylinders，which protect the small space in which they are stored must（）.
Halon extinguishers used on a class C fire should be directed at the（）.