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GATE 2019 CE (CE2) – Question 17

Construction Materials · Concrete: constituents, mix design, short-term and long-term properties · 1 mark · Multiple choice

Fine aggregate has fineness modulus 4.3. In which interval does its mean particle size lie?

  1. 150 μm to 300 μm
  2. 300 μm to 600 μm
  3. 1.18 mm to 2.36 mm
  4. 2.36 mm to 4.75 mm

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Show answer and explanation

Correct answer: (C) 1.18 mm to 2.36 mm

Explanation

The standard sieve sizes double successively. A fineness modulus between 4 and 5 places the representative size between 1.18 and 2.36 mm: **C**. Fineness modulus is a cumulative sieve index, not a particle diameter in millimetres.