The GATE Grind

GATE 2025 ME – Question 24

Machining and Machine Tool Operations · Abrasive and non-traditional machining processes · 1 mark · Multiple choice

Ceramics and glass are machined by

  1. electric discharge machining
  2. ultrasonic machining
  3. electrochemical machining
  4. transferred arc plasma machining

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Show answer and explanation

Correct answer: (B) ultrasonic machining

Explanation

Ceramics and glass are hard, brittle and do not conduct electricity, so electric discharge and electrochemical machining cannot be used. Ultrasonic machining works by abrasive action and suits brittle, non-conducting materials.