单项选择题
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
When two fire hose teams are attacking a fire they shou...
单项选择题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
When towing astern what equipment should be stowed read...
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
When should a fire be ventilated?（）A.When attacking the...
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
