1. Most recent type of denture adhesive isCellulose based saltsAcrylic adhesivesSalts of gontrezNatural gumsQuestion 1 of 20 2. A system of manufacturing copings from blocks of pure titanium by machine duplication and spark erosion isCaptekProceraInceramEmpressQuestion 2 of 20 3. which orthodontic wire shows shape memorya-TiCo-CrNiTiTMAQuestion 3 of 20 4. dental plaster powder and dental stone powder differ mainly inchemical formulashelf lifesolubilityparticle porosityQuestion 4 of 20 5. in Co-Cr alloys the constituent responsible for corrosion resistance iscobaltchromiumnickelsilverQuestion 5 of 20 6. Which of the following property of amalgam is adversely affected by triturating with mechanical deviceWorking timeLess tarnish resistanceHardness of final mixtureGloss of final mixtureQuestion 6 of 20 7. the most important mechanical property involved when a base metal partial denture clasp is adjusted istensile strengthelastic imithardnesselongationQuestion 7 of 20 8. when force is applied perpendicular to the metal surface,resultant deformation iscompressive strainshearing stresstensile stresstensile strainQuestion 8 of 20 9. What chemical is added to prevent polymerization of polymethylmethacrylate during storage:Benzoyl peroxideCamphorquinoneHydroquinoneTertiary aminesQuestion 9 of 20 10. Pyroplastic flow in dental porcelainShould optimally be highIs determined by potash formIs not an important considerationIs decreased with a low soda/potash ratioQuestion 10 of 20 11. Fluid wax impression techniques may use following waxes exceptKerr ivory inlay waxSticky waxApplegates fluid waxKorecta waxQuestion 11 of 20 12. what filler is used in impression compound "alginate"sodium bicarbonatesodium phosphatediatomaceous earthcalcium alginateQuestion 12 of 20 13. Which material is sensitive to Sulfur contamination from latex gloves:PolyetherAgarAddition siliconePolysulfideQuestion 13 of 20 14. direct wax pattern may distort due tocomposition of waxmethoc of heating of waxthe placement of reserviorrelease of internal stressesQuestion 14 of 20 15. Pinhole porosities are related toDistortion of wax patternCasting investment junctionSprue casting dissociationEntrapement of gas during solidificationQuestion 15 of 20 16. which of the following will form a peritectic alloysilver and palladiumsilver and goldsilver and tinsilver and copperQuestion 16 of 20 17. the accuracy of the temperature of the casting furnace may be verified byobserving the color of the mold in shadowusing templates of chemicals that melt at a specific temperatureusing a thermometerreading the pyrometerQuestion 17 of 20 18. Fins and spines in casting are caused by:Prolonged heatingRapid heating of investmentIncreased casting pressureWater film presentQuestion 18 of 20 19. all of the following processes can be performed at room temp exceptforgingcold workingwork hardeningstrain hardeningQuestion 19 of 20 20. A base that is typically placed over a calcium hydroxide base (which has been placed over a pulp exposure); is known as:direct basesecondary baseindirect baseprimary baseQuestion 20 of 20 Loading...