Dental Materials MCQs

Page No. 53

Which of the following has the highest modulus of elasticity ?


aDentin

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bEnamel

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cAmalgam

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dComposite Resin

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View Answer Enamel

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


aGreater toughness

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bGreater ductility

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cA higher modulus of elasticity

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dMore resistance to permanent deformation

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


aThixotropic

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bPseudoplastic

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cDilatant

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dNewton

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View Answer Dilatant

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


aResilience

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bMaximum flexibility

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cToughness

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dElastic limit

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View Answer Maximum flexibility

Space lattice refers to_______________?


aInter atomic movement

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bInter atomic imbalance

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cArrangement of atoms

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dArrangement of molecules

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View Answer Arrangement of atoms

Munsell system is used to_________________?


aDefine and measure colour qualitatively

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bDefine and measure physical properties of gold alloys

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cEvaluate brittleness of different alloys

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dMeasures different colours quantitatively

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A crystal in metal substructure is_______________?


aGrain

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bNucleus

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cStroma

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dNone of the above

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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

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bEutectic mixture

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cPeritectic mixture

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dInter metallic compounds

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View Answer Solid solution

For adhesion to be present between solid and liquid________________?


aLiquid should wet solid surface

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bMechanical interlocking should be present

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cShould have high contact angle

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dNone of the above

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


aDuctile materials

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bFlexible materials

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cBrittle materials

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dMalleable materials

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View Answer Brittle materials

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