Subjects
Science CBSE Homework Assignments
Class 8
Combustion and flame
Efficiency of fuel

2. Calorific value and fuel

Question:

3 m.

1. Choose the incorrect statement from the following. Forest fires are usually due to

carelessness of humans
heat of Sun
cutting of trees
lightning strike

2. The calorific value of a fuel is expressed in a unit called

kilogram per millilitre
kilojoule per litre
kilojoule per kilogram
kilojoule per gram

3. In villages, people use wood as fuel because of

it is considered to be an ideal fuel
its easy availability and low cost
it catches fire easily
it is environment friendly

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