Multiple choice

Why it is advised to apply machine oil or grease in the moving parts of a machine at regular intervals?

  1. To increase wearing by increasing friction

  2. To give it a shiny appearance

  3. To prevent wearing by decreasing friction

  4. To prevent wearing by increasing friction
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Machine oil or grease is used in moving parts of a machine in order to prevent wearing by decreasing friction.

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