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:C
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%