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%

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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