Dental Materials MCQs

Page No. 21

The material used in its pure form in dentistry is______________?


aComposite


bSilver


cGold


dAmalgam


View Answer Gold

In type II gold alloys _______ Karat gold is used?


a24 K


b22 K


c18 K


d10 K


View Answer 18 K

White gold alloy predominantly is______________?


aGold added with palladium


bGold added with calcium


cGold with much of chromium


dGold with silver



Model plaster (white) used to cast study models before mixing with water, is largely composed of____________?


aCaO


bCaCO3


c(CaSO4)2-½H2O


dCaSO4-2H2O


View Answer (CaSO4)2-½H2O

Water powder ratio of dental stone and plaster is respectively_________________?


a0.28 and 0.6


b0.6 and 0.28


c0.6 and 3.2


d0.28 and 0.98


View Answer 0.28 and 0.6

Green strength with reference to plaster means_____________?


aDry strength


bStrength of dental stone due to green colour


cCompressive strength


dThe wet strength


View Answer The wet strength

Water of reaction needed to react completely with 100 g of calcium sulphate hemihydrates to convert it to calcium sulphate dihydrate______________?


a18.6ml


b22.2ml


c30.4ml


d45.3ml


View Answer 18.6ml

Plaster of paris is mixed in________________?


aPlastic bowl


bRubber bowl


cGlass bowl


dMetal bowl


View Answer Rubber bowl

Die is________________?


aImpression of single teeth


bImpression of whole teeth


cReplica of single tooth


dReplica of whole tooth



The main ingredient in dental plaster in_______________?


aCalcium sulphate hemihydrate


bCalcium phosphate


cCalcium anhydrate


dCalcium sulphate dihydrate



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