Why are lubricants like oil and graphite grease applied regularly between the moving mechanical parts of…

Why are lubricants like oil and graphite grease applied regularly between the moving mechanical parts of factory machines?
  1. To increase friction and prevent parts from moving too quickly
  2. To form a smooth layer that reduces friction and prevents wear
  3. To make the machine parts heavier so gravity holds them down
  4. To produce static charge that powers the motor

Solution

Lubricants form a thin smooth film between moving surfaces, preventing direct interlocking and reducing friction and wear.

Asked in: Homi Bhabha Practice

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