Graphite is sprinkled on to the surface of green sand moulds to Foundry Technology Mcqs October 31, 2019 BILAL KHATTAK0 A.exclude the burn out effect B.improve surface finish C.minimize surface finish D.reduce the number of blow holesRelated Mcqs:Piston ring are plated with chromium, cadmium or phosphate toWhich of the following holes appear on the surface of the casting when it is machined?Green sand moulds areWhich statement is not true for green sand moulding?As compared to green sand in shell moulding cooling rate of cast metal is slow. Hence as compared to green sand castings, shell moulded castings will haveGreen House effect is caused by __________?Fine sand is used for preparing the moulds forStub tooth are cut on gearsPower capacitors are usedApart from reducing friction and cooling the surfaces, the function of lubricant in I.C. engines is