Decrease of which of the following will increase the porosity property of molding sand.

1 & 2

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3 & 4

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1, 2, 3 & 4

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2 & 3

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Solution

The correct option is C 1, 2, 3 & 4
The decrease in Ramming force, Clay content, Saw dust, Grain size of sand particle will increase the porosity property of molding sand.

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