Lekao: 22 year first-class fire engineer "technical practice" knowledge points

Fire extinguishing mechanism and scope of application of fire extinguishers

One 、 Fire extinguishing mechanism of fire extinguishers

( One ) Dry powder fire extinguisher —— Chemical inhibition 、 asphyxia . in addition , There are also some dilute oxygen and cooling effects .

( Two ) Carbon dioxide fire extinguisher —— asphyxia 、 cooling .

Two 、 Scope of application of fire extinguishers

( One )A Class fire ( Solid material fire ) Water based type can be used ( Water mist 、 bubble ) Fire extinguisher 、ABC Put out the fire with dry powder extinguisher .

( Two )B Class fire ( Liquid or fusible solid material fire ) Water based type can be used ( Water mist 、 bubble ) Fire extinguisher 、BC Class or ABC Dry powder type fire extinguisher 、 Put out the fire with a clean gas fire extinguisher .

( 3、 ... and )C Class fire ( Gas fire ) Dry powder fire extinguishers can be used 、 Water based ( Water mist ) Fire extinguisher 、 Clean gas fire extinguisher 、 Put out the fire with carbon dioxide fire extinguisher .

( Four )D Class fire ( Metal fire ) You can use 7150 Extinguish with fire extinguishing agent

( 5、 ... and )E Class fire ( Live fire ) It is best to use carbon dioxide fire extinguisher or clean gas fire extinguisher to put out the fire , without , Dry powder can also be used 、 Water based ( Water mist ) Put out the fire with fire extinguishers .

( 6、 ... and )F Class fire ( Cooking fires in cooking utensils ) Optional BC Dry powder type fire extinguisher 、 Water based ( Water mist 、 bubble ) Put out the fire with fire extinguishers .

3、 ... and 、 The hazard level of the place where the fire extinguisher is equipped

( One ) Industrial buildings are divided into the following three levels ：(1) Serious hazard level .(2) Medium risk .(3) Light hazard level .

( Two ) Civil buildings are divided into the following three levels ：(1) Serious hazard level .(2) Medium risk .(3) Light hazard level .

The above is all that lekao brings to you . Here it is , I hope all candidates can actively prepare for the exam , I wish you all success in passing the exam . More exam information , Please pay attention to lekao ！