Which type of bearing reduces friction in operation?

• A. Friction
• B. Antifriction
• C. Ball Bearings
• D. Thrust Bearings

Answer: (B)

Antifriction bearings are designed to minimize resistance by converting sliding motion into rolling motion. The rolling contact between balls (or rollers) and raceways greatly reduces friction compared with sliding contact, which cuts energy loss, wear, and heat during operation. Lubrication further lowers friction and protects the surfaces, helping the bearing rotate smoothly for longer periods.

This is why the term antifriction directly describes the function of reducing friction in operation. Ball bearings are a common example of antifriction bearings, but the category as a whole is defined by that friction-reducing purpose. Friction itself isn’t a bearing type, and thrust bearings are geared toward handling axial loads, not inherently about minimizing friction—although some are antifriction types, the general answer that captures the function is antifriction bearing.