The GATE Grind

GATE 2017 ME (ME1) – Question 32

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

Match processes P electrical-discharge machining, Q ultrasonic machining, R chemical machining, S ion-beam machining with characteristics 1 no residual stress, 2 machining electrically conductive materials, 3 machining glass, 4 nano-machining.

  1. P–2, Q–3, R–1, S–4
  2. P–3, Q–2, R–1, S–4
  3. P–3, Q–2, R–4, S–1
  4. P–2, Q–4, R–3, S–1

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Show answer and explanation

Correct answer: (A) P–2, Q–3, R–1, S–4

Explanation

EDM relies on electrical discharges and requires a conductive workpiece, P–2. Ultrasonic abrasive removal is suited to brittle glass, Q–3. Chemical machining avoids mechanical and thermal machining loads, giving the intended no-machining-induced-residual-stress characteristic, R–1. Ion beams enable very fine removal, S–4. The matching option is A.

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