Increase in content of the binders in the core sand always increases the porosity of the core material.(a) True(b) FalseI had been asked this question by my school principal while I was bunking the class.The above asked question is from Forces Acting on Cores and Mold topic in section Mold and Mold Making of Casting-Forming-Welding I

Increase in content of the binders in the core sand always increases t

1.	Increase in content of the binders in the core sand always increases the porosity of the core material.(a) True(b) FalseI had been asked this question by my school principal while I was bunking the class.The above asked question is from Forces Acting on Cores and Mold topic in section Mold and Mold Making of Casting-Forming-Welding I
Answer» CORRECT answer is (B) False The BEST explanation: Increase in content of the binders in the core sand basically holds the sand grains together tightly and reduces the pore size in the core sand. So generally, there is a tendency for a reduction in the POROSITY of the core material. And the hardness of core sand increases CONTINUOUSLY with the increase in the concentration of the binders.

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