The GATE Grind

GATE 2020 MT – Question 40

Manufacturing Processes · Metal casting · 2 marks · Multiple choice

Match products P gas-turbine blades, Q seamless tubing, R automotive cylinder blocks, S tungsten filament to processes 1 sand casting, 2 extrusion, 3 powder metallurgy and wire drawing, 4 investment casting.

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

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Show answer and explanation

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

Explanation

Complex turbine blades use precision investment casting, P–4. Seamless tubing can be extruded over a mandrel, Q–2. Engine cylinder blocks use sand-core casting, R–1. Tungsten filaments are made through powder processing followed by drawing, S–3. The complete matching is D.

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