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GATE 2021 ME (ME2) – Question 15

Casting, Forming and Joining Processes · Powder metallurgy · 1 mark · Multiple choice

The size distribution of the powder particles used in Powder Metallurgy process can be determined by

  1. Laser scattering
  2. Laser reflection
  3. Laser absorption
  4. Laser penetration

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Show answer and explanation

Correct answer: (A) Laser scattering

Explanation

Particle size affects the angular distribution of scattered laser light. Measuring that distribution and applying an optical scattering model yields the particle-size distribution.

The intended technique is **laser scattering (A)**. The other labels are not the stated particle-sizing principle.