Question

Which of the following should be done to control fire?

Reduce the nitrogen supply
Increase fuel supply
Reduce the heat supply
Increase the oxygen supply​

Answer 1

Answer:

Fire can be extinguished in 3 ways:

By removing the fuel.

By removing the heat.

By cutting off the air supply to the burning substance.

Answer 2

To control the fire reduce the heat supply (option c).

• Fire is caused when the fuel is heated up at or above its ignition temperature.
• Ignition temperature is the least temperature fuel can achieve to start the combustion process
• On reducing the heat supply the temperature of fuel decreases below the ignition temperature, which stops the fire.

The other given options are not a good choice because:

• An increase in fuel supply will further aggravate the fire.

• An increase in oxygen supply will keep the combustion process on and will not stop a fire.

• An increase in nitrogen supply also does not guarantee to put off fire because it cannot replace oxygen completely which is the main source of combustion.

• Hence, reducing heat supply is the correct option.