1. Least amount of mercury is required inSphericalAdmixedHybridLathe cutQuestion 1 of 20 2. an amalgam is an alloyof two or more metalsone of whose consituent is silverof silver and tinone of those whose constituent is mercuryQuestion 2 of 20 3. The relative amount of lightness or darkness in a color is referred to as:chromavalueintensityhueQuestion 3 of 20 4. Addition of fillers in composite resins:Reduces strengthIncreases wettabilityDecreases wear resistanceDecreases polymerization shrinkageQuestion 4 of 20 5. nickel in high percentages in noble metal dental casting alloysincreases ductilitydecreases tarnish resistancedecreases strengthall of the aboveQuestion 5 of 20 6. Non eugenol pastes contain ____ instead of eugenol:PolyethylmethacrylateZinc chlorideZinc acetateOrthoethoxy benzoic acidQuestion 6 of 20 7. Which of the following will produce the most rigid restoration for framework of same dimensionPalladium alloysWrought alloyCobalt chrome alloysPartial denture casting gold in hardened conditionQuestion 7 of 20 8. the most important mechanical property involved when a base metal partial denture clasp is adjusted istensile strengthelongationelastic imithardnessQuestion 8 of 20 9. Inlay wax suitable for making indirect pattern isType IIIType IAny of the aboveType IIQuestion 9 of 20 10. Which investment shows high contraction due to loss of water and alcohol:Silicate bondedGypsum bondedPhosphate bonded investmentMg bondedQuestion 10 of 20 11. Disinfection of alginate impressions when immersion method is used should not exceed10m5m30m20mQuestion 11 of 20 12. Structural durability is a?Structural phenomenonMechanical phenomenonNone of the aboveBiological phenomenonQuestion 12 of 20 13. Purpose of reservior is toPrevent localised shrinkage porosityPrevent removal of molten metalGives smooth polished surfaceHelp in removal of waxQuestion 13 of 20 14. mercury disposal is done bycontrolled combustionsafe collection and reusetreatment with aciddeep burialQuestion 14 of 20 15. Polishing agent which is known as whitening agentRougeChromium oxideIron oxideNone of the aboveQuestion 15 of 20 16. carnauba wax is added to basic paraffin wax toensure uniformity of batchesrender it resistant to cracking and flakingimprove the smoothness in moldingdecrease flow at mouth tempQuestion 16 of 20 17. the accuracy of the temperature of the casting furnace may be verified byusing templates of chemicals that melt at a specific temperaturereading the pyrometerusing a thermometerobserving the color of the mold in shadowQuestion 17 of 20 18. most common reason for incomplete casting when using a centrifugal casting machine isnarrow spruelarge reservoirhollow spaceincreased porosity of the investmentQuestion 18 of 20 19. Must commonly used coupling agent of composites:-SilicatesZirconateTitanatesOrganosilanesQuestion 19 of 20 20. Transformation toughening of zirconia occurs due to change in phase from:Cubic to tetragonalTetragonal to monoclinicAustenitic to martensitiMonoclinic to tetragonalQuestion 20 of 20 Loading...