1. Least soluble cement in water:SilicateGICZinc oxide eugenolZinc phosphateQuestion 1 of 20 2. Which of the following statements is not true regarding glass ionomer cements?good thermal insulatorrelease fluoridehigh solubility after initial settingthermal expansion similar to toothQuestion 2 of 20 3. Cavity Varnish is used with:CompositeGlass IonomerAmalgamCompomerQuestion 3 of 20 4. Animal test used to check biocompatibility of dental material is all exceptImplantation testLD50 testbuehlar testAme's testQuestion 4 of 20 5. Fins and spines in casting are caused by:Increased casting pressureWater film presentProlonged heatingRapid heating of investmentQuestion 5 of 20 6. The phenomenom where porcelain appears different under varying light conditions isOpacificationTransmittanceRegractive opticsMetamerismQuestion 6 of 20 7. Maximum shrinkage occurs in which stage:Low bisqueAll stages show equal shrinkageHigh bisqueMedium bisqueQuestion 7 of 20 8. Loss of colour stability in self polymerizing resins is due to degradation of:Benzoyl peroxide initiatorTertiary aminePolymethyl methacrylateHydroquinoneQuestion 8 of 20 9. which orthodontic wire shows shape memoryTMANiTiCo-Cra-TiQuestion 9 of 20 10. the antiflux used for gold solders isgraphitesilicontitaniumcryoliteQuestion 10 of 20 11. Non eugenol pastes contain ____ instead of eugenol:Orthoethoxy benzoic acidZinc acetatePolyethylmethacrylateZinc chlorideQuestion 11 of 20 12. Hardening heat treatment for gold copper alloys involvesQuenching immediately after castingHeating to 350 degree C for 15-30 min followed by quenchingHeating to 700 degree C for 10 min followed by quenchingQuenching immediately after recrystallisationQuestion 12 of 20 13. Which of the following is used for making blades and sharp surgical instruments:martensitic steelAustenitic steelnone of the aboveFerrite steelQuestion 13 of 20 14. the prinicipal factor in minimising the firing shrinkage of porcelain is thethoroughness of condensationratio of flux to feldsparuniformity of particle sizefusion temperatureQuestion 14 of 20 15. best cement for cementation of orthodontic molar bandssilicophosphatesilicatezinc phosphateGICQuestion 15 of 20 16. the union of metal to porcelain fused restoration is bycobalt and porcelainmechanically rough surfacetin and indium oxidesnickel and orcelainQuestion 16 of 20 17. With which of the following impression materials is it advisable to wait 20 to 30 minutes before pouring of models for stress relaxation to occur?polyetherscondensation siliconespolyvinyl siloxanesPolysulfidesQuestion 17 of 20 18. type IV gold casting alloys are used for fabricatingshort span bridgesinlays3/4 crownsremovable partial denture frameworksQuestion 18 of 20 19. the ability of diresct filling gold to be welded together at room temperature is because of its malleability andlack of oxide surface coatinghigh thermal conductivityhigh degree of purityextreme softnessQuestion 19 of 20 20. Young's modulus is defined as:Stress/strain below elastic limitStress/strain above elastic limitArea under the stress strain curve till point of fractureLimit where a material shows plastic defonnationQuestion 20 of 20 Loading...