1. the union of metal to porcelain fused restoration is bytin and indium oxidesnickel and orcelaincobalt and porcelainmechanically rough surfaceQuestion 1 of 20 2. Stiffness is related to?Degree of plastic resistanceDegree of elastic resistanceResistance to elastic deformationResistance to plastic deformationQuestion 2 of 20 3. for a successful metal ceramic restoration both the metal and porcelain must have closely matchedsolidification shrinkagespecific gravitycompressive strengthcoefficient of thermal expansionQuestion 3 of 20 4. in Co-Cr alloys the constituent responsible for corrosion resistance ischromiumsilvercobaltnickelQuestion 4 of 20 5. Structural durability is a?Biological phenomenonNone of the aboveMechanical phenomenonStructural phenomenonQuestion 5 of 20 6. Not associated with corrosion products in metal alloysSulphidesCarbonatesOxidesChloridesQuestion 6 of 20 7. Which of the following statements is not true regarding glass ionomer cements?good thermal insulatorthermal expansion similar to toothhigh solubility after initial settingrelease fluorideQuestion 7 of 20 8. Which phase of the amalgam reaction is prone to corrosion in clinical restorations?gamma-onegamma-twogamma-threeGammaQuestion 8 of 20 9. the restorative material having hardness nearest to that of enamel isdirect filling goldamalgammicrofilled composite resinsilicate cementQuestion 9 of 20 10. In hot and dry environment, alginate shrinks byAccretionImbibitionSyneresisHysteresisQuestion 10 of 20 11. Cementation failure of a prosthesis cemented with Zinc Polycarboxylate occurs at:Between cement layerIn the prosthesis itselfCement and prosthesis interfaceCement tooth interfaceQuestion 11 of 20 12. Soldering flux is composed of all of the following EXCEPT one. Which one is the EXCEPTION?alumboraxsodium pyroboratesilicaQuestion 12 of 20 13. The phenomenom where porcelain appears different under varying light conditions isOpacificationTransmittanceMetamerismRegractive opticsQuestion 13 of 20 14. 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 14 of 20 15. Function of molybdenum in base metal alloys?Decreases strengthDecrease corrosion resistanceIncreases strengthIncrease CTEQuestion 15 of 20 16. Beta hemihydrate is calcinated byIn absence of airDehydrated in a boiling solution of 30% calcium chlorideIn presence of airUnder steam pressure in autoclaveQuestion 16 of 20 17. which cement has the highest modulus of elasticityzinc polyreinforced ZOEglass ionomer cementzinc polycaroxylatezinc phosphateQuestion 17 of 20 18. dental impression compound is characterised by having aspecific melting pointrelatively low thermal conductivitycrystalline atomic structurecross linkage reaction upon heatingQuestion 18 of 20 19. Inlay wax suitable for making indirect pattern isType IIIType IIAny of the aboveType IQuestion 19 of 20 20. which zone of flame is used for melting alloysreducing zonecombustion zoneoxidising zonecentral zoneQuestion 20 of 20 Loading...