A.use different fire hose pressuresB.use fire hoses of ……

单项选择题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

单项选择题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

单项选择题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

单项选择题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

单项选择题When must a dry chemical fire extinguisher be recharged?（）

A.After each use
B.When the air temperature exceeds 90°F
C.Every 6 months
D.Every 12 months