1) What to do to extend your projector's lamp life?
Correct Answer: To operate economy mode
2) Which is used to clean the projector lens?
Correct Answer: Isopropyl alcohol
3) Which one is the most expensive part of the projector?
Correct Answer: Lens
Explanation:

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4) What is the another name of touch pad?
Correct Answer: Trackpad
5) Which is a pointing device?
Correct Answer: Touch pad