單項選擇題When used to fight fire,carbon dioxide().

A.is effective if used promptly on an oil fire
B.has a greater cooling effect than water
C.is lighter than air
D.is harmless to cargo and crew


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1.單項選擇題When two fire hose teams are attacking a fire they should().

A.use different fire hose pressures
B.use fire hoses of different sizes
C.not attack the fire from opposite sides
D.not wear protective clothing

2.單項選擇題When towing astern what equipment should be stowed ready for use near the towline?()

A.First aid kit
B.Axe or cutting torch
C.Fire extinguisher
D.Chafing gear

3.單項選擇題When should a fire be ventilated?()

A.When attacking the fire directly
B.When using a steam smothering system
C.When using the fixed CO2 system
D.All of the above

4.單項選擇題When possible,what should be the FIRST step in combating a fire on deck resulting from a cargo overflow or a leaking cargo line?()

A.Blanket the cargo spill with foam
B.Prevent the spread of fire with a foam dam
C.Apply CO2 on burning fuel at its source
D.Shut off the transfer of cargo

5.單項選擇題When possible,what is the FIRST step in fighting an engine fuel-pump fire which results from a broken fuel line?()

A.Secure all engine room doors,hatches,and vents
B.Close the fuel line valve
C.Check the spread of the fire with foam
D.Cast the barge off the wharf