Virtual Labs

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Aim

Theory

Pretest

Procedure

Simulation

Posttest

References

Contributors

Feedback

To determine permeability number of green sand, core sand and raw sand

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Beginner

Intermediate

Advanced

What does the permeability of sand measure? (LO1)

a: The strength of the sand mould Explanation

Explanation

b: The ability of gases to pass through the sand Explanation

Explanation

c: The temperature resistance of sand Explanation

Explanation

d: The hardness of the sand particles Explanation

Explanation

Why is permeability important in casting? (LO1)

a: To ensure the molten metal solidifies quickly Explanation

Explanation

b: To allow gases and water vapour to escape from the mould Explanation

Explanation

c: To increase the weight of the casting Explanation

Explanation

d: To improve the chemical composition of the metal Explanation

Explanation

How does grain size affect permeability? (LO4)

a: Finer grains increase permeability Explanation

Explanation

b: Coarser grains increase permeability Explanation

Explanation

c: Grain size has no effect on permeability Explanation

Explanation

d: Permeability increases only if grains are angular Explanation

Explanation

What is the standard air volume used in the AFS permeability test? (LO2)

a: 1000 cc Explanation

Explanation

b: 2000 cc Explanation

Explanation

c: 5000 cc Explanation

Explanation

d: 100 cc Explanation

Explanation

What is the purpose of the manometer in the permeability test? (LO2)

a: To measure the pressure drop across the sand specimen Explanation

Explanation

b: To measure the temperature of molten metal Explanation

Explanation

c: To check the weight of the sand sample Explanation

Explanation

d: To determine the surface roughness of the casting Explanation

Explanation

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