How does automatic fire extinguisher work?

➣ How Do They Work? When heat from an uncontrolled fire increases to a pre-set temperature of the unit, the fusible link releases, discharging the extinguishing agent. The release temperature of the extinguisher (fusible link) can be pre-set at works ranging from 57ºC/68ºC/79ºC/93DC/140ºC and so on.

What is a 12 B fire extinguisher?

This extinguisher provides the firefighting power of 12.5 gallons against fires in ordinary combustibles and 120 square feet of firefighting power against flammable liquids and gasses.

How do fire extinguishers work step by step?

The acronym PASS is used to describe these four basic steps.

1. Pull (Pin) Pull pin at the top of the extinguisher, breaking the seal.
2. Aim. Approach the fire standing at a safe distance.
3. Squeeze. Squeeze the handles together to discharge the extinguishing agent inside.
4. Sweep.

How does a nitrogen fire extinguisher work?

Nitrogen operates as a fire suppressant by reducing the oxygen content within a room to a point at which the fire will extinguish, without compromising the safety of individuals present in the room. Nitrogen will not decompose or produce any by-products when exposed to a flame.

What is an automatic fire detection system?

Automatic fire detection and alarm systems are a fairly recent addition to the range of equipment available to combat the threat of fire in buildings, creating an effective and reliable means of detecting fires and signalling an alarm to the occupants.

What are the two critical functions of automatic fire systems?

The purpose of an automatic fire-alarm system is to detect an occurrence, alert the control panel and proper authorities, and notify the occupants to take action.

What is the difference between a B1 and B2 fire extinguisher?

You can use water, or a Class A fire extinguisher, to put out this type of fire. Class B fires, on the other hand, have a flammable liquid fuel source, like gasoline. The number after the B, for example a B1 or B2 extinguisher, indicates the capacity of the extinguisher.

What is the order of operating a fire extinguisher?

A: Aim the extinguisher nozzle on the hose low, toward the base of the fire. S: Squeeze the handle or lever to discharge the extinguisher. S: Sweep the nozzle back and forth. Keep the fire extinguisher aimed at the base of the fire and move it from side to side until the flames are extinguished.

How do you use a fire extinguisher explain pass method with the help of diagram?

When operating a fire extinguisher, remember the word PASS:

1. Pull the pin. Hold the extinguisher with the nozzle pointing away from you and release the locking mechanism.
2. Aim low. Point the extinguisher at the base of the fire.
3. Squeeze the lever slowly and evenly.
4. Sweep the nozzle from side-to-side.

How does a fire extinguisher work class 10?

Soda acid type extinguisher acts by cutting off supply of air. It acts on all types of fire except due to electrical and inflammable liquids. The carbon dioxide is liberated by the action of acid on baking soda. It increases the percentage of carbon dioxide in air (CO2 is non supporter of combustion).

How does fire brigade extinguish fire?

When fire brigade arrives, it pours water on the fire. Water cools the combustible material, so that its temperature is brought below its ignition temperature. Water vapour also surrounds the combustible material, helping in the cutting off the supply of air. So the fire is extinguished.

How does a fire extinguishing agent work?

You can read more details on fire extinguishing agents here. Fire extinguishers contain either water or a smothering material, such as CO2. By pulling out the safety pin and depressing the lever at the top of the cylinder, the fire extinguishing material is released under high amounts of pressure.

What is a water extinguisher used for?

Water extinguishers are used on Class A Fires (Combustibles such as wood, paper, cloth, trash, and plastics) and extinguishes a fire by removing its heat component. When the heat is removed, the chemical reaction for fire is no longer viable and the fire is extinguished.

How does a compressed gas fire extinguisher work?

The compressed gas is released, applying a downward pressure on the fire-extinguishing material, and pushing it out the nozzle under tremendous force. Although the temptation is to aim the extinguishing material at the flames, the proper way is to aim it directly at the fuel.

How do fire extinguishers remove Flames?

Flames need fuel, oxygen and heat in order to burn. Fire extinguishers are designed to remove one of these elements by applying an agent that either cools the burning fuel, or removes or displaces the surrounding oxygen. You can read more details on fire extinguishing agents here.