Combustion and Fire Quiz

What is the primary chemical process involved in combustion?

• Reduction

• Condensation

• Sublimation

• Oxidation

Which of the following materials is considered non-combustible?

• Asbestos

• Charcoal

• Wood

• Petrol

What is demonstrated by placing a glass over a burning candle?

• Fuel is necessary for combustion

• Heat is necessary for combustion

• Light is necessary for combustion

• Air is necessary for combustion

What role does oxygen play in combustion?

• It inhibits combustion

• It cools down the reaction

• It supports combustion

• It acts as a fuel

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

• Boiling point

• Ignition temperature

• Flash point

• Melting point

Which of the following is an example of a substance with a low ignition temperature?

• Sand

• Water

• Petrol

• Iron

What is the calorific value of a fuel?

• The amount of light produced

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

• The amount of fuel consumed

• The amount of smoke produced

Which factor is NOT important when selecting a fuel?

• Safety to store

• Availability

• Fuel efficiency

• Color of the fuel

Why is water not suitable for extinguishing electrical fires?

• It is heavier than air

• It is too expensive

• It conducts electricity

• It evaporates too quickly

What makes carbon dioxide an effective fire extinguisher for oil fires?

• It reacts with oil

• It is heavier than oxygen and covers the flame

• It cools the fire

• It is lighter than oxygen