Question

True centrifugal castings can be prepared in ___________ moulds.

(a) Metal

(b) Sand

(c) Metal and sand

(d) Sand and chemical

This question was posed to me during an interview.

My query is from Centrifuging Processes topic in chapter Moulding Machines & Special Moulding Processes of Foundry and Forging

Answer 1

The correct answer is (c) Metal and sand

The explanation: Metal moulds prove to be economical when larger quantities of castings are required to be produced. The true centrifugal castings may be produced in metal or sand lined moulds, depending largely upon the quantity desired.