Dental Materials MCQs

Page No. 53

Which of the following has the highest modulus of elasticity ?


aDentin


bEnamel


cAmalgam


dComposite Resin


View Answer Enamel

A restorative material which has a high proportional limit, compared with one with a lower proportional limit would have________________?


aGreater toughness


bGreater ductility


cA higher modulus of elasticity


dMore resistance to permanent deformation



Liquids which become more rigid as the rate of deformation increases is termed as_____________?


aThixotropic


bPseudoplastic


cDilatant


dNewton


View Answer Dilatant

The strain that occurs when a material is stressed to its proportional limit is______________?


aResilience


bMaximum flexibility


cToughness


dElastic limit


View Answer Maximum flexibility

Space lattice refers to_______________?


aInter atomic movement


bInter atomic imbalance


cArrangement of atoms


dArrangement of molecules


View Answer Arrangement of atoms

Munsell system is used to_________________?


aDefine and measure colour qualitatively


bDefine and measure physical properties of gold alloys


cEvaluate brittleness of different alloys


dMeasures different colours quantitatively



A crystal in metal substructure is_______________?


aGrain


bNucleus


cStroma


dNone of the above


View Answer Grain

When two metals are completely miscible in liquid state and they remain completely mixed on solidifiation, the alloy formed is called________________?


aSolid solution


bEutectic mixture


cPeritectic mixture


dInter metallic compounds


View Answer Solid solution

For adhesion to be present between solid and liquid________________?


aLiquid should wet solid surface


bMechanical interlocking should be present


cShould have high contact angle


dNone of the above



Brazilian test is used to determine the ultimates tensile strength of_________________?


aDuctile materials


bFlexible materials


cBrittle materials


dMalleable materials


View Answer Brittle materials

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