单项选择题

Where should muster lists be posted?（）

A.In crews accommodation spaces
B.On the navigating bridge
C.In the engine room
D.All of the above

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单项选择题

The best method of extinguishing a class A fire is to （）.

A.remove oxygen from the area
B.smother fire with foam
C.smother fire with CO₂
D.cool fuel below ignition temperature

单项选择题

When approaching a fire from win ward, you should shield firefighters from the fire by using（）

A.low-velocity fog
B.high-velocity fog
C.a straight stream of water
D.foam spray

单项选择题

Diesel fuel vapors （）.

A.can not be ignited by a spark unless the vapor is in a confined space
B.are nontoxic in all concentrations
C.can not be ignited by a spark unless they are at their auto-ignition temperature
D.are heavier than air