In the green sand moulding of steel casting, what is the bentonite percentage composition?(a) 1.5%(b) 2.5%(c) 3.5%(d) 4.5%The question was posed to me at a job interview.The query is from Molding Sand Mixtures for Casting in chapter Molding and Core Sands of Casting-Forming-Welding I

In the green sand moulding of steel casting, what is the bentonite per

1.	In the green sand moulding of steel casting, what is the bentonite percentage composition?(a) 1.5%(b) 2.5%(c) 3.5%(d) 4.5%The question was posed to me at a job interview.The query is from Molding Sand Mixtures for Casting in chapter Molding and Core Sands of Casting-Forming-Welding I
Answer» Correct choice is (c) 3.5% Explanation: In GREEN sand mouldings of steel castings, the dextrin percentage is quite LOWER, it is around 0.5%. The bentonite percentage COMPOSITION in green sand molding is CALCULATED to be 3.5%.

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