单选题Fire in the cabins. Close all fire doors and use the （）powder extinguisher.A dryB wetC foamD portable

A fire pump may be used for other purposes if ______.

A.the other services are run off a reducing station with a pressure gage

B.one of the required pumps is kept available for use on the fire main system at all times

C.no relief valves are installed

D.all of the above conditions are met

If a firefighting situation calls for low-velocity fog you would ______．

A.order the engine room to reduce pressure on the fire pump

B.put the lever on an all-purpose fire nozzle all the way forward

C.attach a low-velocity fog applicator with the nozzle shut down

D.put the lever on an all-purpose fire nozzle all the way back

发生火情时，客人们能用电梯吗?

A.Can guests use the stairs when a fire appears?

B.Can guests use the elevators when a fire presents?

C.Can guests use the lifts when a fire occurs?

D.Can guests use the ladders when a fire breaks up?

Oceangoing dry bulk cargo vessels over 1000 GT must have approved combination-type fire nozzles at all ______．

A.Fire stations aboard the vessel，except for those in open deck areas weatherdeck and cargo hold fire stations

B.Interior fire stations

C.Engine room fire stations

D.All of the above

Generally, the first action in extinguishing an LFG fire caused by escaping gas is to ______.

A.sweep flames away with water spray

B.shut off the leak

C.use a chemical foam fire extinguisher

D.call the local fire department

To prevent the spread of fire by conduction, you should ______.

A.cool the bulkheads around the fire

B.remove combustibles from direct exposure

C.close all openings to the area

D.shut off all electric power