Question

Which of the following acts as a better lubricant for the moving parts of
a machine?
(a) Water (b) Chalk powder
(c) purified air (d) dry soil

Answer 1

Hi buddy,

According to me the correct answer should be (c) purified air because there are various machines which use air as a lubricant. For example, air bearings use air as lubricant

Hope this helps ;-)

Answer 2

Explanation:

Chalk powder bshxakzjsiknwhsmcmecjjx