Carbondioxide moulding is useful for
A.very thin sections
B.regular sections
C.heavy and thick walled sections
D.all of the above
Category: Foundry Technology Mcqs
Scabs may be caused by
A.low permeability of sand
B.high moisture content of sand
C.intermittent running of molten metal over the sand surface
D.any of the above
Which of the following operations improve wear resistance and mechanical properties of castings?
A.Shot peening
B.Chilling
C.Nitriding
D.All of the above
