Which of the following is used as protective admixture in moulding sand for magnesium castings?
A) Boric acid
B) Sublimed sulphur
C) Fluoric additives
D) Any of the above
Correct Answer:
Verified
Q12: Chaplets are provided to
A)reduce core sag
B)support heavy
Q13: Polystyrene often used as a consumable pattern
Q14: For stress relieving, castings are
A)heated to low
Q15: Gated patterns are normally used for
A)castings for
Q16: Casting made in relatively simple shapes and
Q18: For sterite refractory bricks are attacked by
A)basic
Q19: Which of the following is the anti-penetration
Q20: The property of sand to withstand the
Q21: Addition of nickel to cast iron increases
A)hardness
B)corrosion
Q22: A casting process which can produce hollow
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