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RRB Junior Engineer / DMS / CMA 2019 · Question 3390 of 3719

Can friction be eliminated entirely by polishing surfaces or by using lots of lubricants?

  1. APolishing makes friction nil and increases the moving object's velocity enormously
  2. BFriction occurs that is almost negligible
  3. CFriction cannot be totally eliminated as there will be some irregularitiesCorrect
  4. DFriction can be made zero by polishing

Answer: C. Friction cannot be totally eliminated as there will be some irregularities

Official answer key verified. Detailed explanation coming soon.

Source: RRB JE 2019 CBT-1 (27-May-2019 Shift 3) — official response-sheet export via freshersnow (answer key) · reliable-secondary

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