Class B fires are best extinguished by smothering, i-e().
- Adeprival of oxygen
- Bremoval of heat
- Cspraying of water
- Dinjecting of soda-acid
Class B fires are best extinguished by smothering, i-e().
1、CO2 extinguishes a fire by ().
CO2 extinguishes a fire by ().Aa blanket of bubbles formed on the surface of the fireBsmotheringCcoolingDisolating the heat from the fuel
2、Dry chemical fire extinguishers are ef
Dry chemical fire extinguishers are effective on which type(s) of fire?()ABurning oilBElectricalCPaintDAll of the above
3、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
4、Halon extinguishes a fire by().
Halon extinguishes a fire by().Abreaking the chain reactionBsmothering the fireCcooling the fireDcoating the fuel with a nonflammable surface
5、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
6、A large oil fire is best extinguished
A large oil fire is best extinguished with()Asoda acidBfoamCCO2Dsand