BD15PS

1- Comments – 120 words

Introduction

Fire outbreak is one of the most devastating agents of threat to physical security. Understanding the process and techniques to mitigate risks from fire depends primarily on extinguishing it. For this purpose, we need to know the kind of materials needed to do so.

Classifying Fires

Hence discussing five kinds of fire based on their source of outbreak and nature below.

Common Combustible - This is the kind of fire that breaks out from general sources found in nature like woods, clothes, garbage, paper etc.  Usually, massive water sprays can extinguish these fire outbreaks but sometimes special chemical liquids, extinguisher powders are used based on the surrounding and bases of the source.

Gas and Liquids – Gas and liquids, which are inflammable, like petroleum, gasoline, oil paint, propane etc fall under this category. These fires can be devastating and stopped by preventing the supply of oxygen at the affected root. Special extinguishers made of carbon, foam, powders work in rescue (Forte & Power, 2007).

Electricity – Fire due to faulty electrical connection or light can be fatal and we are more or less aware of its source and effect. Voltage fluctuation, damaged cords or electric wires, electrical appliance malfunctioning are the common cause behind such outbreaks. In these cases, water does not work and may cause more devastating results (Wallace & Weber, 2011). Disabling the source from which the fire has emerged is the basic task followed by the use of powder-based extinguishers and carbon dioxide.

Metals – Alkali metals with combustible elements like magnesium, potassium, aluminium, sodium etc can catch fire for overheating and other similar conditions. Extinguisher powders can effectively put off these disasters (Forte & Power, 2007).

Edible oils – Animal fats, vegetable oils etc are vulnerable to catch fire due to overheating . like electric fire, this incident also needs disabling the sources and use of fluids to extinguish fire.

Conclusion

            There are different names of incidents happening due to different kinds of fires across the world’s disaster management systems.

 

2- Comments – 120 words

When someone is facing a fire, he/she needs to think fast about how to extinguish it. Identifying the types of fire properly can go a long way in extinguishing it properly. There are five different classifications of fires. Each of this type contains different type of flammable materials and requires different methods of putting it out (Rheinhardt et al., 2018). The different classifications are:

· Class A fires are the most common types of fires. It mainly involves solid materials like wood, paper, plastic or clothing. Class A fires can be started unintentionally while lighting a match stick or by using a candle. It is also the easiest to extinguish with the help of water or foam extinguishers.

· Class B fires are mainly caused by flammable materials or liquids like oil, alcohol or gasoline. It can start anywhere where these flammable liquids or gases are stored. It can be put off with the help of foam, powder or carbon dioxide extinguishers.

· Class C fires are mainly caused due to short circuits and mainly involve electricity. It can happen mainly from old wirings in the houses or from faulty appliances of the houses (Sousa et al., 2019). This type of fires can be extinguished using carbon dioxide or dry powder fire extinguishers.

· Class D fires mainly occur due to the ignition of a metal. This type of fire is very much rare and mainly occurs in laboratories or in industries. It can be extinguished using dry powder extinguisher only.

· Class K fires are the last ones and is mainly related to vegetable oils or cooking oils. It mainly starts if a heating pan is left for a long time over a stove. It can be extinguished using wet chemical extinguishers.