Question

Mr. Firoze is a retired man who lives in a big house. He has recently replaced all the filament-type bulbs in his house by CFls. His wife and children have a habit of keeping the lights and fans on (even when there is no one in the room) but Mr. Firoze keeps on going to every room periodically to switch them off. A few days back Mr. Firoze had purchased a device which can cook rice and dal without using any usual fuel. He has also installed an equipment on the roof of his house to obtain hot water. Mr. Firoze uses bicycle for short distances like going to nearby market, instead of scooter or car.
(a) What is CFL ? Why has Mr. Firoze replaced all the filament-type bulbs in his big house by CFLs ?
(b) Why does Mr.Firoze keep switching off lights and fans when no one is in the rooms ?
(c) Name the device which Mr. Firoze has purchased to cook rice and dal without using any usual fuel ?
(d) Name the equipment which Mr. Firoze has installed on the house-roof to obtain hot water ?
(e) Why does Mr. Firoze use bicycle for going through short distances ?
(f) What values are displayed by Mr. Firoze by all the above actions ?

Answer 1

(a) CFL stands for Compact Fluorescent Lamp. Mr. Firoze has replaced all the filament- type bulbs by CFLs to save electricity (or electrical energy) because CFLs consume much less electricity as compared to the traditional filament-type bulbs.
(b) Mr. Firoze keeps switching off lights and fans when no one is in the rooms to save electricity by preventing its wastage.
(c) Solar cooker.
(d) Solar water heater.
(e) Mr. Firoze uses bicycle for short distances to save petrol (which is used in scooter or car). Cycling also keeps him physically fit.
(f) The value displayed by Mr. Firoze by all his actions are (i) Conservation (or saving) of fossil fuels like coal and natural gas (which are used to produce electricity), LPG (which is used to cook food or heat water), petroleum (which gives petrol to run cars and scooters), and (ii) Concern for the environment to keep it pollution free (because burning of less fossil fuels produces less air pollution).