Combustion and Fire Extinguisher- 8A

What is combustion?

• A type of dance move

• The process of freezing water

• A method of cooking food

• A chemical reaction between a fuel and an oxidizing agent, usually producing heat and light.

List three uses of a fire extinguisher.

• 1. Spraying it on a barbecue to enhance the flavour.

  2. Serving as a source of temporary hydration during emergencies.

  3. Acting as a sound amplifier for certain cases.

• 1. Using it to water plants. 2. Using the extinguisher as a makeshift vacuum cleaner for small debris. 3. Providing warmth during cold weather by igniting the extinguisher's contents.

• 1. Adjusting the pH levels of soil in a garden to promote plant growth.

  2. Applying a reflective coating to surfaces for aesthetic purpose. 3. Enhancing the visual effects of a bonfire during a celebration.

• 1. Disrupting the combustion process in ordinary combustibles (Class A).

  2. Smothering and cooling flammable liquid fires (Class B).

  3. Non-conductive suppression of electrical fires (Class C).

How does carbon dioxide cut off the supply of oxygen in a fire?

• It increases the amount of oxygen in the surrounding air

• It has no effect on the supply of oxygen in a fire

• It creates a barrier that prevents oxygen from reaching the fire

• It displaces the oxygen in the surrounding air

Name three common fuels used in combustion.

• Gasoline, natural gas, wood

• Electricity, oil, glass

• Coal, diesel, plastic

• Propane, paper, hydrogen

Define calorific value in the context of fuels.

• The smell of the fuel

• The color of the flame produced by the fuel

• Amount of heat energy produced by the complete combustion of a unit quantity of fuel

• The weight of the fuel

What are the three essential components required for combustion to occur?

• Metal, wood, and plastic

• Water, air, and light

• Cold, darkness, and silence

• Fuel, oxygen, and heat

Explain the process of ignition in combustion.

• The process of ignition in combustion involves cooling the fuel instead of heating it

• Ignition occurs when the fuel is mixed with water instead of oxygen

• Combustion is initiated by applying pressure to the fuel

• Heat is applied to a fuel in the presence of oxygen, leading to the release of energy in the form of heat and light.

What are the different types of fire extinguishers and their uses?

• There are five main types of fire extinguishers: Water and Foam, Carbon Dioxide (CO2), Dry Chemical, Wet Chemical, and Clean Agent. Each type is designed to extinguish specific classes of fires, such as Class A, B, C, D, or K.

• Fire extinguishers are all the same and can be used interchangeably for any type of fire.

• There are three main types of fire extinguishers: Foam, Wet Chemical, and Clean Agent, each designed for a different type of fire.

• There are two main types of fire extinguishers: Water and Dry Chemical, both used for the same types of fires.

How does a fire extinguisher help in controlling a fire?

• It spreads the fire by releasing more oxygen

• It creates a barrier to prevent the fire from spreading

• It increases the temperature of the burning material

• It releases chemicals to cool the burning material, displace or remove oxygen, or stop the chemical reaction causing the fire.

Why is it important to understand the different classes of fires when using a fire extinguisher?

• To make the fire look more interesting

• To use the appropriate type of fire extinguisher for each specific fire.

• To have a reason to buy multiple fire extinguishers

• To confuse people about which extinguisher to use