Virtual Labs

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Aim

Theory

Pretest

Procedure

Simulation

Posttest

References

Contributors

Feedback

To determine the clay content present in base sand.

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Intermediate

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What is the primary objective of this experiment? (LO4)

a: To determine the moisture content of sand Explanation

Explanation

b: To evaluate the permeability of sand Explanation

Explanation

c: To measure the clay content in base sand Explanation

Explanation

d: To analyse the grain size of sand Explanation

Explanation

What is the role of a mechanical stirrer in the experiment? (LO2)

a: To mix sand with water and NaOH for uniform suspension Explanation

Explanation

b: To increase the drying speed of the sand Explanation

Explanation

c: To remove large impurities from the sand Explanation

Explanation

d: To compact the sand for better accuracy Explanation

Explanation

How do you know when to stop the siphoning process? (LO2)

a: When the water in the jar becomes clear Explanation

Explanation

b: When the sand particles stop settling Explanation

Explanation

c: When no more clay can be seen in the water Explanation

Explanation

d: When the sand particles float in the jar Explanation

Explanation

How is the percentage of clay content calculated? (LO4)

a: By dividing the initial weight of sand by the weight after drying Explanation

Explanation

b: By subtracting the dried sand weight from the initial sand weight and using a formula Explanation

Explanation

c: By measuring the volume of clay settled in the jar Explanation

Explanation

d: By multiplying the wet sand weight by the oven temperature Explanation

Explanation

What would happen if the sand is not completely dried before weighing? (LO2)

a: The clay content will be underestimated Explanation

Explanation

b: The clay content will be overestimated Explanation

Explanation

c: The sand weight will remain unchanged Explanation

Explanation

d: The sand will dissolve in water Explanation

Explanation

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