单项选择题
Fire in an engine compartment is best extinguished with carbon dioxide gas (CO2) and by（）.
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
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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 -
单项选择题
Fire hose couplings（）.
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
