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With an increase in area of the specimen, what change is seen in the permeability number?

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in Casting-Forming-Welding II by (119k points)
With an increase in area of the specimen, what change is seen in the permeability number?

(a) Increases

(b) Decreases

(c) No change occurs

(d) No relation among the two

I had been asked this question in semester exam.

This interesting question is from Testing of Core Sands topic in section Sand Reclamation & Control Test of Casting-Forming-Welding II

1 Answer

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Right option is (b) Decreases

Explanation: With an increase in the area of the specimen, there is a decrease in the permeability number, since the two have an inverse relation.

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