Question
Question: Which one of the following can also act as a lubricant in the machines?...
Which one of the following can also act as a lubricant in the machines?
A
Iron fillings
B
Polish on machines
C
Flow of water through the machine
D
Flow of compressed and purified air
Answer
Flow of compressed and purified air
Explanation
Solution
In the machines, the flow of compressed and purified air lowers the friction, hence it acts as a lubricant.