Question

Question 5:

Give reasons:

(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

Answer:

• water is not used to control fires involving electrical equipment as water is a good conductor of electricity it can increase the possibility of shock ( distilled water is an exception)
• wood produces a lot of smoke and takes time to catch fire
• as alluminium fire absorbs heat and paper does not get it's ignition temperature

ignition temperature is the minimum temperature at which a substance catches fire

Explanation:

Hope it helps you

Answer 2

Answer:

1. water is not used to control fire involving electrical equipment because water is a good conductor of electricity it may cause electrical currents in result .

2. LPG has more calorific value and produces no pollution so that's why LPG is a better domestic fuel than wood.

3. paper by itself catches fire easily where as a piece of paper wrapped around an aluminium pipe doesn't because aluminium absorbs the heat so paper does not aittian its ignition temperature .

Explanation:

I hope it's helpfull.