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Question-1
Which of the following has the highest calorific value?

(A) Petrol	(B) Coke
(C) Natural gas	(D) Kerosene

Question-2
The zone where carbon particles get extremely hot, they begin to glow and emit orange & yellow light.

(A) Innermost zone	(B) Middle zone
(C) Outermost zone	(D) Wax zone

Question-3
Select the fuel with highest calorific value?

(A) LPG	(B) Kerosene oil
(C) Wood	(D) Hydrogen gas

Question-4
____________ are the source of heat energy for domestic and industrial purposes.

(A) Chemicals	(B) Fuels
(C) Gases	(D) Liquids

Question-5
Fire brigade uses which of the following first at a fire accident site?

(A) Fire extinguisher	(B) Carbon dioxide
(C) Water	(D) Sand

Question-6
While burning of fuel, which of the following gas is not emitted.

(A) Sulphur dioxide	(B) Carbon monoxide
(C) Carbon dioxide	(D) Oxygen

Question-7
Combustion in which large amounts of heat and light energy are released which often results in fire is called .

(A) Slow combustion	(B) Spontaneous combustion
(C) Rapid combustion	(D) None of these

Question-8
Water cannot be used as fire extinguisher to put out:

(A) burning wood	(B) burning oil
(C) burning cloth	(D) burning charcoal

Question-9
Which of the following has the characteristics of a good fuel?

(A) Coke	(B) Butane
(C) Coal	(D) Kerosene

Question-10
________ fuels do not leave any residue after burning.

(A) Solid	(B) Gaseous
(C) Liquid	(D) Primary

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Std 8

CBSE

Practice in Related Chapters
Combustion,flame and fuel
Coal and Petroleum
Synthetic Fibres and Plastics
Pollution of Air and Water
Metals and Non-Metals