CO2 extinguishes a fire by ().
- Aa blanket of bubbles formed on the surface of the fire
- Bsmothering
- Ccooling
- Disolating the heat from the fuel
CO2 extinguishes a fire by ().
1、Class B fires are best extinguished by
Class B fires are best extinguished by smothering, i-e().Adeprival of oxygenBremoval of heatCspraying of waterDinjecting of soda-acid
2、If a CO2 fire extinguisher is not read
If a CO2 fire extinguisher is not readily available, which of the listed fire extinguishers would be best suited to combat a small electrical fire in a switchboard?()ADry chemicalBHalonCLow velocity fogDSteam
3、After extinguishing a fire with CO2,it
After extinguishing a fire with CO2,it is advisable to().Ause all CO2 available to cool the surrounding areaBstand by with water or other agentsCthoroughly ventilate the space of CO2Djettison all burning material
4、Foam extinguishes a fire by().
Foam extinguishes a fire by().Asmothering the burning materialBchemical combination with burning materialCabsorbing the burning materialDorganic destruction of the burning material
5、Halon extinguishes a fire by().
Halon extinguishes a fire by().Abreaking the chain reactionBsmothering the fireCcooling the fireDcoating the fuel with a nonflammable surface
6、Foam extinguishes a fire by().
Foam extinguishes a fire by().Ashutting off the air supplyBcooling the fuel to below ignition temperatureCdispersing the fuelDremoving the source of ignitio