1. Correct property of the tilite alloy isBonding to porcelain is more as compare to noble metalCantilever up to 5 mm can be givenIdeal for implantsComposition is nickel, chromium, molybdenum, titaniumQuestion 1 of 20 2. Purpose of reservior is toPrevent removal of molten metalGives smooth polished surfaceHelp in removal of waxPrevent localised shrinkage porosityQuestion 2 of 20 3. Pinhole porosities are related toSprue casting dissociationEntrapement of gas during solidificationCasting investment junctionDistortion of wax patternQuestion 3 of 20 4. Which of the following is formed by spray atomization and chemical precipitation of molten goldGranular goldMat goldCrystalline goldGold foilQuestion 4 of 20 5. Temp at which tertiary amine activates benzoyl peroxide release free radicals60?C50?C25? C37?CQuestion 5 of 20 6. Clinical appearance of GIC is dictated byParticle size of powderAcid content of liquidViscosity of liquidChemical composition of cementQuestion 6 of 20 7. setting time of zinc phospahte cement is retarted bydiluting the liquid with a small amount of waterdecreasing the rate of addition of powder to liquidincreasing the powder liquid ratioincreasing the rate of addition of powder to liquidQuestion 7 of 20 8. Primer which etches and primes dentin is known as:Self etching primerTwo step systemSelf etch adhesiveAuto etch adhesiveQuestion 8 of 20 9. role if indium in amalgam isto reduce formation of gamma 2 phaseto reduce release of mercury during amalgam polishingto reduce elease of mercury during masticationto reduce formation of gamma phaseQuestion 9 of 20 10. Gutta percha, stearic acid and shellac are added to impression compound to:To prevent leaching out ofthermolabile componentsTo improve softness at melting temperatureTo increase stifthess and hardness of the compoundImprove workability & plasticityQuestion 10 of 20 11. All of the following metals are considered to be base metals EXCEPT one.Which one is the EXCEPTIONsilverchromiumnickelcobaltQuestion 11 of 20 12. Fluoride flux used in soldering works by Weakens the solder jointPrevents formation of chromium oxide or dissolves already formed chromium oxidePreventing flow of solder to other areasForms a protective film during solderingQuestion 12 of 20 13. What chemical is added to prevent polymerization of polymethylmethacrylate during storage:HydroquinoneCamphorquinoneTertiary aminesBenzoyl peroxideQuestion 13 of 20 14. Effects associated with cold working i.e lowered ductility and distorted grains can be eliminated by process known asAnnealingConcentricityStrain hardeningEutecticQuestion 14 of 20 15. diamond particle size of 125-150 um is catagorised asfinecoarsemediumextrafineQuestion 15 of 20 16. Soldering flux is composed of all of the following EXCEPT one. Which one is the EXCEPTION?silicasodium pyroborateboraxalumQuestion 16 of 20 17. heat energy required for vaporisation of liquid after boilinglatent heat of sublimationlatent heat of fusionmelting temperaturelatent heat of vaporisationQuestion 17 of 20 18. What distinguishes a base from a cement from a cavity liner?biocompatibility of materialdegree of pulpal protectiondegree of hardnessfinal application thicknessQuestion 18 of 20 19. gold alloys used for the fabrication of saddle bars and clasps aretype IVtype IItype Itype IIIQuestion 19 of 20 20. main advantage of zinc phosphate over GIC isincreased tensile strengthmore biocompatibilityincrease compressive strengthincrease modulus of elasticityQuestion 20 of 20 Loading...