What is fire short answer?

Fire is a chemical reaction in which energy in the form of heat is produced. When forest fuels burn, there is a chemical combination of the oxygen in the air with woody material, pitch and other burnable elements found in the forest environment. This process in known as �Combustion. Fire begins with ignition.

How fire is extinguished?

All fires can be extinguished by cooling, smothering, starving or by interrupting the combustion process to extinguish the fire. One of the most common methods of extinguishing a fire is by cooling with water. When water is applied, it undergoes changes as it absorbs heat from the fire: Its temperature will rise.

Can fire be extinguished with fire?

Fire can be used to fight forest fires, albeit with a certain amount of risk. A controlled burn of a strip of forest will create a barrier to an oncoming forest fire as it will use up all the available fuel.

What are the effects of fire?

It plays a key role in shaping ecosystems by serving as an agent of renewal and change. But fire can be deadly, destroying homes, wildlife habitat and timber, and polluting the air with emissions harmful to human health. Fire also releases carbon dioxide—a key greenhouse gas—into the atmosphere.

What are the 3 ways to extinguish a fire?

The extinguisher should be operated only by a qualified lab technician, as you may risk spreading a fire if you don’t know what you’re doing. What are the three main ways to put out a fire? Remove the fuel (Starvation), the heat (Cooling), or the oxygen (Smothering).

When would you attempt to extinguish a fire?

the fire is spreading quickly beyond the point of origin. the extinguisher is not having any effect or is having an adverse reaction on the fire. you cannot extinguish the fire quickly (less than 30 seconds) you do not know what fuels are involved in the fire.

What is ABC in fire extinguisher?

Dry Chemical (ABC, BC and DC) Extinguishers You may see them labeled: “DC” short for “dry chem” “ABC” indicating that they are designed to extinguish class A, B, and C fires. “BC” indicating that they are designed to extinguish class B and C fires.

What is blue fire extinguisher?

The five fire extinguisher colours are: Blue – Dry Powder. Black – Carbon Dioxide (CO2) Cream – Foam. Red – Water (Spray and Mist)

Why do children think fire is alive?

Children tend to think fires are living because they consume wood, move, require air, reproduce (sparks cause other fires) and give off waste (such as smoke).

What causes a fire extinguisher to depressurize?

When this happens, fire extinguisher depressurization occurs. This process can be due to a leaky or damaged valve or valve component such as an O-ring seal or valve stem. Damage to the cylinder itself can also cause slow leaks.

How does a compressed gas fire extinguisher work?

They are then pressurized with an expellant gas, normally dry nitrogen or dry air within the same cylinder. The extinguisher valve and its related components keep the compressed gas from escaping until operated. Over time, like an old or worn car tire, a fire extinguisher can develop a slow leak that releases the gas.

What happens when a fire burns a substance?

When a fire burns, a process called oxidation occurs, the same process that causes metal to rust. Oxidation is when oxygen atoms combine with carbon and hydrogen to form carbon dioxide and water.

Is it dangerous if a fire extinguisher is leaking gas?

While a leaking or depressurized fire extinguisher isn’t dangerous in and of itself (the gas won’t cause damage to people, for example), its dangers are nevertheless serious. A lack of pressure causes a fire extinguisher to be inoperable.