單項選擇題

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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單項選擇題

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

單項選擇題

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

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

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Fire hose should be washed with（）.

Fire hose couplings（）.

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