单项选择题

Fire hose should be washed with（）.

A.salt water and a wire brush
B.caustic soap
C.mild soap and fresh water
D.a holystone

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单项选择题

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

单项选择题

Fire fighting equipment requirements for a particular vessel may be found on the（）.

A.4Certificate of Inspection
B.Certificate of Seaworthiness
C.Classification Certificate
D.Certificate of Registry

单项选择题

Fire extinguishing agents used on Class C fires must be（）.

A.able to absorb heat
B.water based
C.nonconducting
D.nontoxic