Dental Materials MCQs

Page No. 21

The material used in its pure form in dentistry is______________?


aComposite

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bSilver

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cGold

✓


dAmalgam

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View Answer Gold

In type II gold alloys _______ Karat gold is used?


a24 K

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b22 K

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c18 K

✓


d10 K

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View Answer 18 K

White gold alloy predominantly is______________?


aGold added with palladium

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bGold added with calcium

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cGold with much of chromium

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dGold with silver

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


aCaO

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bCaCO3

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c(CaSO4)2-½H2O

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dCaSO4-2H2O

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View Answer (CaSO4)2-½H2O

Water powder ratio of dental stone and plaster is respectively_________________?


a0.28 and 0.6

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b0.6 and 0.28

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c0.6 and 3.2

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d0.28 and 0.98

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View Answer 0.28 and 0.6

Green strength with reference to plaster means_____________?


aDry strength

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bStrength of dental stone due to green colour

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cCompressive strength

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dThe wet strength

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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

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b22.2ml

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c30.4ml

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d45.3ml

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View Answer 18.6ml

Plaster of paris is mixed in________________?


aPlastic bowl

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bRubber bowl

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cGlass bowl

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dMetal bowl

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View Answer Rubber bowl

Die is________________?


aImpression of single teeth

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bImpression of whole teeth

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cReplica of single tooth

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dReplica of whole tooth

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The main ingredient in dental plaster in_______________?


aCalcium sulphate hemihydrate

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bCalcium phosphate

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cCalcium anhydrate

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dCalcium sulphate dihydrate

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