How do firefighters help us?
Firefighters or firemen are people whose job is to put out fires and rescue people. Besides fires, firefighters rescue people and animals from car wrecks, collapsed buildings, stuck elevators and many other emergencies. Firefighters wear heavy clothing to protect them from the heat when they are fighting with a fire.
Why are firefighters so important?
Firefighters also provide an important role in educating the public regarding fire and safety. According to Williams, by teaching fire prevention and educating the public on how to respond in emergency situations, they can help save lives.
Why is firefighting a good job?
Firefighting is a rewarding career that offers a very high level of job satisfaction. Being a firefighter is a great job if you enjoy helping people and serving your community, but be aware that it can be demanding, stressful, and even dangerous at times.
How does a fireman protect us from fire?
Accordingly, firefighters are equipped with personal protective equipment (PPE) that includes fire-resistant clothing such as Nomex or polybenzimidazole fiber (PBI) and helmets that limit the transmission of heat towards the body.
What causes fire to spread?
A fire spreads by transferring heat energy in three ways: Radiation, Convection, and Conduction. Radiation refers to the emission of energy in rays or waves. Heat moves through space as energy waves. As the fire front gets closer, the amount of radiant heat received is increased.
What is Backdraft and why is it so dangerous?
A backdraft in a structure fire or forest fire is very dangerous because it occurs very quickly and exhausts entirely all the oxygen in the immediate vicinity leaving nothing for humans. The heat is very intense and burn very quickly and intensely and almost spontaneously due to temperature rise.
How do you prevent flashovers?
Proper ventilation can prevent a flashover. Venting allows superheated air and fuel-loaded fire gases to escape the room or area. This can be done by horizontal or vertical ventilation. Reducing the heated ceiling layer reduces the thermal radiation feedback and the possibility of flashover.
What causes Backdraft?
A backdraft is caused by the sudden introduction of air into a fire that has depleted most of the available oxygen in a room or building. Since a fire requires air, fuel and heat, the latter two must be present as well.