单项选择题
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
相关考题
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单项选择题
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 -
单项选择题
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 -
单项选择题
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
