单项选择题

A fire must be ventilated（）.

A.when using an indirect attack on the fire such as flooding with water
B.to prevent the gases of combustion from surrounding the firefighters
C.to minimize heat buildup in adjacent compartments
D.if compressed gas cylinders are stowed in the compartment on fire

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热门试题

单项选择题A fire main system must have enough fire hydrants so that each accessible space may be sprayed with（）.

A.a low velocity spray applicator
B.a water spray or solid stream
C.at least two spray patterns of water
D.at least 25 psi delivered pressure

单项选择题A fire is discovered in the forepeak of a vessel at sea. The wind is from ahead at 35 knots. You should（）.

A.remain on course and hold speed
B.change course and put the stern to the wind
C.change course to put the wind on either beam and increase speed
D.remain on course but slack the speed

单项选择题A fire in electrical equipment should be extinguished by using（）.

A.salt water
B.foam
C.low-velocity fog
D.CO₂

单项选择题A fire in a ballast pumproom can be brought under control with minimal impact on stability by（）.

A.cooling the outside bulkheads with water
B.shutting all sources of air into the compartment
C.closing the sea chest
D.flooding the compartment with salt water

单项选择题A fire hose has a（）.

A.male coupling at both ends
B.female coupling at both ends
C.female coupling at the nozzle end and a male coupling at the hydrant end
D.male coupling at the nozzle end and a female coupling at the hydrant end