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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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The value of pressure taken in the definition of permeability according to American Foundry Men Society (AFS) is:

a: 5 g/cm² Explanation

Explanation

b: 10 g/cm² Explanation

Explanation

c: 15 g/cm² Explanation

Explanation

d: 25 g/cm² Explanation

Explanation

Composition of green sand is:

a: Silica sand, 10% clay, 2-5 % water and about 5 % sea coal Explanation

Explanation

b: Silica sand, 15-20 % clay, 8 % water Explanation

Explanation

c: Silica sand, 8 % clay, 7-9 % water and about 5 % sea coal Explanation

Explanation

d: Silica sand, 8 % clay, 2-5 % water and about 3 % sea coal Explanation

Explanation

Permeability number depend on which of the following factors:

a: Time for 2000 cc of air passed through the sand specimen Explanation

Explanation

b: Height of the specimen Explanation

Explanation

c: Area of the specimen Explanation

Explanation

d: All the above Explanation

Explanation

Permeability of moulding sand does not depend on which of the following facto:

a: Molten metal poured Explanation

Explanation

b: Amount of binder content Explanation

Explanation

c: Degree of compactness Explanation

Explanation

d: Grain size Explanation

Explanation

Increase in clay content would result in:

a: Increase permeability Explanation

Explanation

b: Decrease permeability Explanation

Explanation

c: Permeability remains constant Explanation

Explanation

d: None of the above Explanation

Explanation

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