Q5. Give reasons: (a) Water is not used to control fires involving electrical equipment. (6) 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.⟬⟭ ⟭⟬ ⁷
Answers
Explanation:
Hence, water is not used to control fires involving electrical equipment. Liquefied Petroleum Gas(LPG) is easy to transport compared to wood. ... LPG does not cause any pollution whereas wood causes pollution by releasing smoke. LPG gives out more heat energy than wood due to higher calorific value.
Answer:
a. Water is not used to control fires involving electrical equipments as water conducts current and may cause the person dousing the fire to be electrocuted.
b. LPG is a better domestic fuel than wood as it does not produce smoke, and a higher calorific value of LPG makes it a better fuel than wood.
c.The ignition temperature required by paper to catch fire is low. So, paper by itself catches fire easily. When the same paper is wrapped around an aluminium pipe, it does not. This is because aluminium being a metal is a good conductor of heat and absorbs the heat energy.