1. The phenomenom where porcelain appears different under varying light conditions isTransmittanceRegractive opticsMetamerismOpacificationQuestion 1 of 20 2. diamond particle size of 125-150 um is catagorised asfinemediumextrafinecoarseQuestion 2 of 20 3. The process by which a casting is heated in a porcelain furnace to a temperature of 980"C to burn off any remaining impurities prior to adding porcelain is called:quenchinginvestingdegassingpicklingQuestion 3 of 20 4. Bond strength required to counteract the effect of polymerization shrinkage in composite resins:17 MPa56 MPa7 MPa21 MPaQuestion 4 of 20 5. maximum shrinkage of firing of ceramic occurs during which stagehigh bisquelow bisquenone of the abovemedium bisqueQuestion 5 of 20 6. in processing an acrylic denture in a water bath a proper heating cycle is desired because of the possibility ofshrinkage of the denturewarpagevolumetric expansion of the denture causing an open biteporosity due to boiling of the monomerQuestion 6 of 20 7. Following is added to zinc polycarboxylate to improve its manageability:Strontium fluorideAluminium oxideStannous fluorideMagnesium oxideQuestion 7 of 20 8. Effects associated with cold working i.e lowered ductility and distorted grains can be eliminated by process known asConcentricityStrain hardeningAnnealingEutecticQuestion 8 of 20 9. Stress is:Force applied per unit areaAn internal force opposing an applied loadA deformation resulting from an applied loadForce applied perpendicular to the surfaceQuestion 9 of 20 10. In hot and dry environment, alginate shrinks byHysteresisSyneresisAccretionImbibitionQuestion 10 of 20 11. porcelain are made opaque by the addition of oxides ofnickel and iridiumtitanium and tiniron and aluminiumboron and magnesiumQuestion 11 of 20 12. Hysteresis, the phenomenon of sol-gel conversion of a reversible hydrocolloid ,is dependent uponWater contentTemperatureAddition of modifiersChemical reaction of constituentsQuestion 12 of 20 13. the accuracy of the temperature of the casting furnace may be verified byusing templates of chemicals that melt at a specific temperatureobserving the color of the mold in shadowusing a thermometerreading the pyrometerQuestion 13 of 20 14. Which impression material is most difficult to remove without fracturing teeth of a stone model?Addition SiliconePolyetherCondensation siliconePolysulphideQuestion 14 of 20 15. Which composite type is 70% to 77% percent filled by volume and has an average particle size ranging from 1 to 3 um.packableshybridsMicrofillsmicrohybridsQuestion 15 of 20 16. what filler is used in impression compound "alginate"diatomaceous earthcalcium alginatesodium phosphatesodium bicarbonateQuestion 16 of 20 17. when selecting the color of cememt to use for cementing a porcelain jacket crown the powder being tested is best mixed withglycerine water solutiononly watercement liquidalcoholQuestion 17 of 20 18. The main component of gypsum bonded investment which provides thermal expansion to compensate for alloy solidification shrinkage isRefractory fillerNone of the aboveBinderModifiers like magnesium oxide and sodium chlorideQuestion 18 of 20 19. type IV gold casting alloys are used for fabricatingremovable partial denture frameworksinlaysshort span bridges3/4 crownsQuestion 19 of 20 20. Bonding of porcelain veneer done by:PolycarboxylateGICRM-GICResin cementQuestion 20 of 20 Loading...