Virtual Labs

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Aim

Theory

Pretest

Procedure

Simulation

Posttest

References

Contributors

Feedback

To find the distribution of sand grains using a set of sieves and to find the average grain fineness number

Choose difficulty:

Beginner

Intermediate

Advanced

What does a high GFN value indicate? (LO1)

a: Coarse sand with high permeability Explanation

Explanation

b: Fine sand with low permeability Explanation

Explanation

c: Irregular-shaped sand grains Explanation

Explanation

d: Sand with high moisture content Explanation

Explanation

Which step is crucial before switching on the sieve shaker? (LO2)

a: Arranging sieves in increasing order (bottom to top) Explanation

Explanation

b: Pouring molten metal into the sand Explanation

Explanation

c: Removing moisture from the sand Explanation

Explanation

d: Mixing sand with water Explanation

Explanation

Why is it necessary to weigh sand separately after sieving? (LO3)

a: To determine the amount of metal required for casting Explanation

Explanation

b: To calculate the percentage retained in each sieve Explanation

Explanation

c: To check if the sand contains moisture Explanation

Explanation

d: To measure the density of the sand Explanation

Explanation

Why is grain fineness important in moulding sand? (LO1)

a: It determines the strength of the final casting Explanation

Explanation

b: It affects permeability and surface finish of the casting Explanation

Explanation

c: It reduces the need for binders in moulding sand Explanation

Explanation

d: It controls the cooling rate of molten metal Explanation

Explanation

How does improper sieve arrangement affect GFN measurement? (LO1)

a: It makes the sand finer than expected Explanation

Explanation

b: It causes inaccurate grain size distribution results Explanation

Explanation

c: It improves the casting quality Explanation

Explanation

d: It helps separate moisture from sand Explanation

Explanation

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