1. percentage of phosphoric acid where Dicalcium monophosphate is formed; which cannot be easily removed50 percent85 percent37 percent25 percentQuestion 1 of 20 2. an advantage of rubber base impression material over reversible hydrocolloid material is that rubber base impression materialrequires less armamentariumis significantly more accurateis more accurate if saliva mucus or blood is presentwill displace soft tissueQuestion 2 of 20 3. About pit and fissure sealant which is wrongIt includes enamel bonding agent and resin without filler contentIn sealed fissures prevent odonto pathogenic bacterial growthIt is made of composite resin and sealant to prevent the cAriesIf in doubt whether the teeth is carious or not seal it with pit and fissure sealantQuestion 3 of 20 4. All of the following metals are considered to be base metals EXCEPT one.Which one is the EXCEPTIONnickelsilvercobaltchromiumQuestion 4 of 20 5. Dental porcelain is manufactured by a process known asCrystallisationDevitrificationCreaming and bisque bakeFrittingQuestion 5 of 20 6. When Alginate is mixed with tap water having high calcium sulfate and magnesium, what happensPermanent deformation of alginateWeakened stone diesRetardation of setting reactionAcceleration of setting reactionQuestion 6 of 20 7. Maximum flow of Type I inlay wax at 45 degrees:2 percent10percent70percent3percentQuestion 7 of 20 8. In mixing dental stone, why should the powder be sprinkled onto the water in the bowl?this process results in better powder mixing and reduced chance for air bubblesthe addition of powder prevents the mix from becoming exothermicthe powder is added to the water to avoid using more than one bowlthis is not recommended; the water should be added to the powderQuestion 8 of 20 9. What chemical is added to prevent polymerization of polymethylmethacrylate during storage:Tertiary aminesHydroquinoneCamphorquinoneBenzoyl peroxideQuestion 9 of 20 10. oxides of all of the following elements in noble metal alloys help in bonding to porcelain exceptirontinnickelindiumQuestion 10 of 20 11. the union of metal to porcelain fused restoration is bycobalt and porcelainmechanically rough surfacetin and indium oxidesnickel and orcelainQuestion 11 of 20 12. heat energy required for vaporisation of liquid after boilinglatent heat of sublimationlatent heat of vaporisationmelting temperaturelatent heat of fusionQuestion 12 of 20 13. what filler is used in impression compound "alginate"calcium alginatesodium bicarbonatesodium phosphatediatomaceous earthQuestion 13 of 20 14. when force is applied perpendicular to the metal surface,resultant deformation istensile straincompressive strainshearing stresstensile stressQuestion 14 of 20 15. A thin application of cavity varnish over the cut surface of a prepared tooth just prior to the cementation of a crown or a bridge with zinc phosphate cement willincrease the possibility of thermal sensitivity.reduce the possibility of irritation of the pulpimpede the seating of the restoration.insulate the tooth against thermal changeQuestion 15 of 20 16. Palladium and platinum are added to base metal alloys to:Reduce brittlenessAct as scavengerAs grain refinersImpart colorQuestion 16 of 20 17. which cement has the highest modulus of elasticityglass ionomer cementzinc polyreinforced ZOEzinc polycaroxylatezinc phosphateQuestion 17 of 20 18. When electroplating an impression with copper the cathode isThe impression being electroplatedDistilled waterA copper paste or rodCopper sulphateQuestion 18 of 20 19. all of the following processes can be performed at room temp exceptstrain hardeningcold workingwork hardeningforgingQuestion 19 of 20 20. which zone of flame is used for melting alloyscombustion zonereducing zoneoxidising zonecentral zoneQuestion 20 of 20 Loading...
