1. What is the main idea of the passage? Be as specific as you can. (1 mark)
Incandescent bulbs are of three types: general service, reflectorized bulbs, and xenon bulbs.
* If students didn’t list those three types of incandescent bulbs, give them 0.5.
2. Why are incandescent bulbs best suitable for task lighting that needs high levels of brightness? (1 mark)
Because they are less energy-efficient than other light sources
3. What is ONE difference between General Service bulbs and reflectorized bulbs? (1 mark)
Reflectorized bulbs direct the light in one direction while general service bulbs give light in all directions. OR
Reflectorized bulbs give approximately double the amount of light as General Service of same wattage.
4. Which type of incandescent bulbs lasts the longest? (1 mark)