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

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Beginner

Intermediate

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What does the Grain Fineness Number (GFN) measure in a sand sample? (LO1)

a: The weight of the sand sample Explanation

Explanation

b: The permeability of the sand Explanation

Explanation

c: The average grain size of the sand Explanation

Explanation

d: The moisture content of the sand Explanation

Explanation

Which of the following factors affects the Grain Fineness Number (GFN) in a sand metal casting process? (LO1)

a: Pouring temperature Explanation

Explanation

b: Type of metal used Explanation

Explanation

c: Desired surface finish Explanation

Explanation

d: All of the above Explanation

Explanation

What is the effect of using a sand sample with a high GFN? (LO1)

a: Increased permeability and gas defects Explanation

Explanation

b: Low permeability, leading to gas defects Explanation

Explanation

c: High metal penetration and rough surface finish Explanation

Explanation

d: Increased burn-in and burn-on defects Explanation

Explanation

What is the purpose of using a sieve shaker? (LO2)

a: To melt sand grains for better fineness Explanation

Explanation

b: To separate sand particles based on size using agitation Explanation

Explanation

c: To increase the weight of the sand sample Explanation

Explanation

d: To chemically bond sand particles together Explanation

Explanation

How does an incorrect Grain Fineness Number (GFN) affect the final casting quality? (LO1)

a: It can lead to surface defects such as roughness or gas porosity Explanation

Explanation

b: It has no impact on the final casting quality Explanation

Explanation

c: It improves the mechanical strength of the casting Explanation

Explanation

d: It increases the cooling rate of molten metal Explanation

Explanation

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