單項(xiàng)選擇題Automatic fire dampers in ventilation systems are operated by a（）.

A.remote operated valve
B.fusible link
C.CO2 system pressure switch
D.heat or smoke detector


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1.單項(xiàng)選擇題According to the T-Boat regulations the reason for providing adequate ventilation for a battery storage area is to prevent（）.

A.accumulation of carbon dioxide gas that chokes the battery
B.accumulation of explosive and toxic gases the battery can generate
C.mildew or dry rot in the battery box
D.battery failure including battery case meltdown caused by excessive heat

2.單項(xiàng)選擇題A fire starting by spontaneous combustion can be expected in which condition?（）.

A.Paints，varnish，or other liquid flammables are stowed in a dry stores locker
B.Inert cargoes such as pig iron are loaded in a wet condition
C.Oily rags are stowed in a metal pail
D.Clean mattresses are stored in contact with an electric light bulb

3.單項(xiàng)選擇題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 availabe for use on the fire main system at all times
C.no relief valves are installed
D.all of the above conditions are met

4.單項(xiàng)選擇題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

5.單項(xiàng)選擇題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