In synthetic sands of aluminium alloys, what is the bentonite percentage composition?(a) 2-5%(b) 3-5%(c) 4-5%(d) 5-6%The question was asked in final exam.My question comes from Molding Sand Mixtures for Casting in portion Molding and Core Sands of Casting-Forming-Welding I

In synthetic sands of aluminium alloys, what is the bentonite percenta

1.	In synthetic sands of aluminium alloys, what is the bentonite percentage composition?(a) 2-5%(b) 3-5%(c) 4-5%(d) 5-6%The question was asked in final exam.My question comes from Molding Sand Mixtures for Casting in portion Molding and Core Sands of Casting-Forming-Welding I
Answer» The CORRECT CHOICE is (c) 4-5% The explanation is: In synthetic SANDS of aluminium alloys, the bentonite percentage composition is calculated to be 4-5%. Whereas, in the case of green sands, the bentonite percentage is recorded to be around 3.5%.

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