GATE 2022 ME (ME2) – Question 22

Computer Aided Manufacturing and Automation · NC/CNC machines and CNC programming · 1 mark · Multiple choice

Which one of the following CANNOT impart linear motion in a CNC machine?

Show answer and explanation

Correct answer: (D) Chain and sprocket

Explanation

Look at how each element moves a CNC slide.

**Linear motor:** produces straight-line force and motion directly. ✓
**Ball screw:** converts the rotation of a screw into precise linear motion of the nut. ✓
**Lead screw:** also converts rotation to linear motion (with more friction). ✓
**Chain and sprocket:** transmits power between rotating shafts. It carries a rotary motion and is not used to position a slide precisely. ✗

So the one that cannot impart linear motion is **chain and sprocket** (D).

Official GATE 2022 answer key: https://gate2026.iitg.ac.in/doc/download/Answer_keys2022/me-merged_2022.pdf