Question Bank • QB_EXP_APE_FNM_004 NAT • 1 Mark

Section 6: Agricultural Process Engineering

Particle Size Analysis & Fineness Modulus

Subtopic: Fineness modulus from sieve analysis

Question Statement:

A sieve analysis test of ground cattle feed using a nest of Tyler standard sieves gives a sum of cumulative percentages of feed retained on all sieves equal to $\sum (\%\text{ retained}) = 325$. The fineness modulus ($FM$) of the ground feed is ________ (round off to two decimal places).

Answer Key:

3.25

Step-by-Step Solution & Explanation

The Fineness Modulus ($FM$) is defined as: $FM = \frac{\sum (\text{Cumulative percentage of material retained on standard sieves})}{100}$ Given $\sum (\%\text{ retained}) = 325$: $FM = \frac{325}{100} = 3.25$
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