Question

1. (a) What are fuels? Name any two common fuels.
(b) State any four characteristics of an ideal fuel (or good fuel) ​

Answer 1

Explanation:

a)A fuel is any material that can be made to react with other substances so that it releases energy as heat energy or to be used for work. Wood and Petrol are examples of two common fuels.

b)Fuel is easily available and cheaper. Burns easily in the air at a moderate rate. Releases a large amount of energy. No harmful substances must be emitted from fuel

Answer 2

Answer:

a) A fuel is any material that can be made to react with other substances so that it releases energy as heat energy or to be used for work. ... The heat energy released by reactions of fuels is converted into mechanical energy via a heat engine.

• Name of two common fuels is petrol and diesel

b)1. The fuel should have high calorific value.

2. The fuel should have proper ignition temperature.

3. The rate of combustion should be balanced and moderate.

4. The content of non-volatile substances should be as low as possible.

Explanation:

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