1. Principle hardener in gold alloy isZincSilverPalladiumCopperQuestion 1 of 20 2. Inlay wax suitable for making indirect pattern isType IIIAny of the aboveType IType IIQuestion 2 of 20 3. Which material has least shelf lifePolysulphidePolyetherAddition siliconeCondensation siliconeQuestion 3 of 20 4. for best results when using an elastic impression material the prepared tooth should becovered with a surface tension reducing agent or air driedfree of surface moisturecovered thinly with a waer soluble lubricantvery dryQuestion 4 of 20 5. A base that is typically placed over a calcium hydroxide base (which has been placed over a pulp exposure); is known as:direct baseprimary baseindirect basesecondary baseQuestion 5 of 20 6. Correct property of the tilite alloy isIdeal for implantsCantilever up to 5 mm can be givenComposition is nickel, chromium, molybdenum, titaniumBonding to porcelain is more as compare to noble metalQuestion 6 of 20 7. Which investment shows high contraction due to loss of water and alcohol:Gypsum bondedSilicate bondedPhosphate bonded investmentMg bondedQuestion 7 of 20 8. Structural durability is a?Mechanical phenomenonBiological phenomenonNone of the aboveStructural phenomenonQuestion 8 of 20 9. nickel in high percentages in noble metal dental casting alloysincreases ductilitydecreases tarnish resistanceall of the abovedecreases strengthQuestion 9 of 20 10. After mixing powder and liquid in case of alginate impression material, gelation will occur in what time (at room temperature)?1-2 minutes10-12 minutes3-4 minutes6-7 minutesQuestion 10 of 20 11. Contact angle between liquid and adherend surface is 180 degree. This suggestsCompletely non wettingPoor wettingnone of the aboveGood wettingQuestion 11 of 20 12. Primer which etches and primes dentin is known as:Two step systemAuto etch adhesiveSelf etch adhesiveSelf etching primerQuestion 12 of 20 13. Stress is:Force applied perpendicular to the surfaceAn internal force opposing an applied loadForce applied per unit areaA deformation resulting from an applied loadQuestion 13 of 20 14. tartaric acid in GIC is added toincrease flow of materialreduce viscosityincrease working timemodify handling propertiesQuestion 14 of 20 15. The main component of gypsum bonded investment which provides thermal expansion to compensate for alloy solidification shrinkage isNone of the aboveBinderRefractory fillerModifiers like magnesium oxide and sodium chlorideQuestion 15 of 20 16. Phosphate bonded investment is made carbon free:To prevent staining of ceramicTo prevent brittleness of alloyFor easier divesting of investmenTo produce smooth castingQuestion 16 of 20 17. the process of driving off the water of crystallisation of gypsum to manufacture powders of plaster and stone is calledsinteringcalciningcrazingfusingQuestion 17 of 20 18. In hot and dry environment, alginate shrinks bySyneresisImbibitionAccretionHysteresisQuestion 18 of 20 19. titanium casting is doneusing cad-cam techniquein specifically fabricated aluminium vanadium cruciblesunder air pressure in nitrogen atmosphereunder vaccum in argon atmosphereQuestion 19 of 20 20. The dentist can best control the setting time of irreversible hydrocolloid impression material by altering theMixing timeAmount of retarder addedWater temperatureWater powder ratioQuestion 20 of 20 Loading...