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Aim

Theory

Pretest

Procedure

Simulation

Posttest

References

Feedback

Determination of Particle Size Distribution by Sedimentation Method (Using Andreasen Pipette)

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1. Sedimentation analysis is based on the principle that:

a: Particles dissolve in the fluid over time Explanation

Explanation

b: Particles settle at rates depending on their size and density Explanation

Explanation

c: Larger particles settle faster than smaller ones Explanation

Explanation

d: All particles settle at the same rate Explanation

Explanation

2. The instrument used in the sedimentation method for sampling is called:

a: Brookfield viscometer Explanation

Explanation

b: U-tube manometer Explanation

Explanation

c: Andreasen pipette Explanation

Explanation

d: Stalagmometer Explanation

Explanation

3. Stokes’ Law is used to relate:

a: Particle size to optical density Explanation

Explanation

b: Settling velocity to particle diameter and fluid properties Explanation

Explanation

c: Density to viscosity Explanation

Explanation

d: Volume to surface area Explanation

Explanation

4. In sedimentation analysis, the medium used for suspending particles is usually:

a: Alcohol Explanation

Explanation

b: Distilled water Explanation

Explanation

c: Acetone Explanation

Explanation

d: Ether Explanation

Explanation

5. The unit of particle diameter determined using Stokes’ law is generally expressed in:

a: Kilograms Explanation

Explanation

b: Micrometers (µm) Explanation

Explanation

c: Centimeters Explanation

Explanation

d: Liters Explanation

Explanation

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