单项选择题
A.electricity B.fuel C.oxygen D.heat
After extinguishing a paint locker fire using the fixed...
单项选择题After extinguishing a paint locker fire using the fixed CO2 system，the next action is to have the space（）.
A.opened and burned material removed B.left closed with vents off until all boundaries are cool C.checked for oxygen content D.doused with water to prevent reflash
After extinguishing a fire with CO2，it is advisable to（...
单项选择题After extinguishing a fire with CO2，it is advisable to（）.
A.use all CO2 available to cool the surrounding area B.stand by with water or other agents C.thoroughly ventilate the space of CO2 D.jettison all burning materials
According to the regulations，what fire safety control f...
单项选择题According to the regulations，what fire safety control feature is required in quick-closing shut off valves?（）
A.Electrical cut off switch B.A fusible link C.Manual cut off switch D.A water spray actuator
