Question

Give reasons for the following:
(a) Water is not used to control fires involving electrical equipment.
(b) LPG is a better domestic fuel than wood.
(c) Paper by itself catches fire easily whereas a piece of paper wrapped around an aluminium pipe does not.

Answer 1

a) because water is good conductor of electricity so it can spread fire all around instead of controlling .

b) because it has high calorific value , it is easy to store , it does not cause much pollution .

c) I don't know this???

Answer 2

Explanation:

• (a) Because Water is a conductor of electricity, so it can easily conduct electric current and cause danger of electric shocks or short-circuits. Therefore, water can not be used to control the fire involving electrical equipment.

• (b)Because LPG is a better domestic fuel as it does not produce smoke and unburnt carbon particles, which cause respiratory problems.

• (c)Because Paper by itself catches fire easily because it has low ignition temperature but when wrapped around an aluminium pipe its temperature is lowered due to aluminium metal absorbing the heat supplied to paper. So it does not catch fire.