Question

Worn out machine parts can be repaired by ________.

• A. electrolysis
• B. electroplating
• C. lubrication
• D. polishing

Answer 1

The correct option is B electroplating

Lubrication is done in machines to decrease friction.

We polish machine parts to make them smooth.

Repairing worn out machine parts by coating them with suitable metal is done by the process of electroplating.

Electroplating is a subset of electrolysis, but electrolysis itself can be of many types. Thus our answer will be electroplating.