Combustion and Flame Quiz

What is combustion?

• A. A physical reaction involving heat and light

• B. A chemical reaction with oxygen producing heat, light, and water

• C. A biological process in plants

• D. A mechanical reaction with no heat produced

What are the conditions required for combustion?

• C. Oxygen, heat, and light

• B. Fuel, oxygen, and ignition temperature

• A. Fuel, water, and air

• D. Water, fuel, and ignition temperature

Which of the following is a non-combustible substance?

• A. Fabric

• B. Iron nail

• C. Charcoal

• D. Wood

What is the lowest temperature at which a substance catches fire?

• C. Ignition temperature

• A. Boiling temperature

• B. Melting temperature

• D. Freezing temperature

How can fire be controlled?

• D. Using a fire extinguisher

• B. Removing oxygen

• A. Adding more fuel

• C. Increasing heat

Which fire extinguisher is best for fires involving electrical equipment and petrol?

• B. Foam fire extinguisher

• D. Powder fire extinguisher

• C. Carbon dioxide fire extinguisher

• A. Water fire extinguisher

What is a flame?

• C. A solid substance

• D. A liquid substance

• A. A type of gas

• B. A region of burning gases producing light and heat

What is a fuel?

• C. A combustible substance that produces heat when burned

• B. A substance that produces light when burned

• A. A substance that produces water when burned

• D. A non-combustible substance

What is the calorific value of a fuel?

• C. The amount of water produced on combustion

• A. The amount of light produced on combustion

• D. The amount of oxygen consumed on combustion

• B. The amount of heat energy produced on complete combustion of 1 kg of the fuel

What is the structure of a flame?

• D. Outermost layer is Blue

• C. Innermost layer is yellow

• B. Middle layer is blue

• A. Outermost layer is black soot