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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热门试题

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

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

单项选择题Fire extinguishers on inspected vessels are numbered by size I through V，with I being（）.

A.used for electrical fires only
B.the smallest
C.the most accessible
D.the most effective

Fire in an engine compartment is best extinguished with carbon dioxide gas (CO2) and by（）.

Fire in an engine compartment is best extinguished with carbon dioxide gas (CO₂) and by（）.