A.Boric sulphur
B.Molasses
C.Charcoal
D.all of the above
Related Mcqs:
- Which of the following is used as protective admixture in moulding sand for magnesium castings?
- In copper alloy foundry which of the following is used to prevent the molten metal from being oxidized?
- A defect in castings in which a discontinuity is formed due to the imperfect fusion of two streams of metal in the mould cavity is known as
- Which one of the following reactions is not an exothermic
- Metal moulds are used in
- Metal moulds are used in all of the following EXCEPT:
- Which of the following metal can be cast in plaster moulds?
- Magnesium aluminium alloys are grain refined by addition of
- In centrifugal castings, the cores are generally made of
- A mould which has good erosion resistance to metal flow and is also collapsible is
