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Aim

Theory

Pretest

Procedure

Simulation

Posttest

References

Feedback

Determination of Particle Size and Particle Size Distribution Using Sieving Method

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1. The cumulative percentage passing through a sieve is calculated by:

a: Adding all individual percentages retained Explanation

Explanation

b: Subtracting cumulative % retained from 100 Explanation

Explanation

c: Multiplying % retained by mesh number Explanation

Explanation

d: Averaging all retained values Explanation

Explanation

2. If larger particles are found in the bottom sieve, it indicates:

a: Proper sieving Explanation

Explanation

b: Improper arrangement or shaking Explanation

Explanation

c: Correct mesh size selection Explanation

Explanation

d: Sample was too dry Explanation

Explanation

3. The shape of the particle size distribution curve is plotted between:

a: % retained vs. mesh number Explanation

Explanation

b: Log particle size (X-axis) vs. % finer (Y-axis) Explanation

Explanation

c: Time vs. weight retained Explanation

Explanation

d: Cumulative weight vs. sieve size Explanation

Explanation

4. The D₁₀ value from the particle size distribution curve represents:

a: Effective diameter where 10% of particles are finer Explanation

Explanation

b: Diameter of coarsest particles Explanation

Explanation

c: Average particle size Explanation

Explanation

d: Median particle size Explanation

Explanation

5. Which of the following steps ensures accuracy in sieving?

a: Overloading the sieves Explanation

Explanation

b: Cleaning sieves before and after use Explanation

Explanation

c: Using wet samples Explanation

Explanation

d: Reducing sieving time Explanation

Explanation

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