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GATE 2017 ME (ME2) – Question 30

Machining and Machine Tool Operations · Cutting tool materials, tool life and wear, economics of machining · 1 mark · Multiple choice

Which statement about ultrasonic machining is true?

  1. The tool vibrates at subsonic frequency.
  2. USM does not employ a magnetostrictive transducer.
  3. USM is excellent for machining ductile materials.
  4. USM often uses a slurry of abrasive particles and water.

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Correct answer: (D) USM often uses a slurry of abrasive particles and water.

Explanation

Ultrasonic machining uses a vibrating tool to drive abrasive particles against the workpiece. The abrasives are commonly delivered as a slurry in water, giving **D**. Tool vibration is ultrasonic, magnetostrictive transducers can be used, and brittle hard materials are especially suitable.