Question Bank • QB_EXP_APE_FNM_003 MCQ • 1 Mark

Section 6: Agricultural Process Engineering

Particle Size Analysis & Fineness Modulus

Subtopic: Tyler standard sieve series progression

Question Statement:

In the standard Tyler sieve series, the ratio of clear opening of any sieve to that of the next smaller sieve is:

Options:

  • (A) $\sqrt{2} \approx 1.414$
  • (B) $2.000$
  • (C) $\sqrt{3} \approx 1.732$
  • (D) $1.259$

Answer Key:

A

Step-by-Step Solution & Explanation

The Tyler standard screen scale is based on a 200-mesh sieve (wire diameter $0.0021\text{ in}$, clear opening $0.0029\text{ in} = 0.074\text{ mm}$). The linear aperture dimensions vary in the geometric ratio of $\sqrt{2} = 1.414$ between successive sieves (area ratio of $2:1$).
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