Science Practice Quiz 243

Q1.Why is it difficult to burn a piece of wood by simply bringing a lighted matchstick near it?

A. Because wood is a poor conductor of heat B. Because wood is a non-combustible material C. Because wood requires a higher temperature to burn D. Because wood needs paper or kerosene oil to start fire

Q2.What is the reason for forest fires during extreme heat of summer?

A. Because of heavy rainfall B. Because of strong winds C. Because of dry grass catching fire D. Because of human activities

Q3.What happens to the paper cup when it is heated in the presence of water?

A. It burns immediately B. It does not burn because the ignition temperature is not reached C. It melts into a liquid D. It evaporates into a gas

Q4.What is an example of an inflammable substance?

A. Water B. Petrol C. Sand D. Clay

Q5.How does water help to extinguish a fire?

A. It melts the fuel B. It evaporates the fuel C. It cools the combustible material and cuts off the supply of air D. It increases the temperature of the fuel

Q6.What are the three essential requirements for producing fire?

A. Fuel, air and water B. Fuel, heat and light C. Fuel, air and heat D. Fuel, oxygen and pressure

Q7.How can fire be controlled?

A. By removing one or more of the essential requirements for producing fire B. By adding more fuel to the fire C. By increasing the temperature of the fuel D. By decreasing the supply of water

Q8.What is the job of a fire extinguisher?

A. To add more fuel to the fire B. To increase the temperature of the fuel C. To cut off the supply of air, or to bring down the temperature of the fuel, or both D. To decrease the supply of water

Q9.Which fire extinguisher is described as the most common in the passage?

A. Carbon dioxide (CO2) B. Water C. Dry powder D. Foam

Q10.What is the main cause of most forest fires?

A. Spontaneous combustion of coal dust B. Heat of the sun C. Lightning strike D. Carelessness of human beings

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Science Practice Quiz 243