1. which zone of flame is used for melting alloysoxidising zonereducing zonecombustion zonecentral zoneQuestion 1 of 20 2. Palladium and platinum are added to base metal alloys to:As grain refinersAct as scavengerReduce brittlenessImpart colorQuestion 2 of 20 3. Stiffness is related to?Degree of plastic resistanceDegree of elastic resistanceResistance to plastic deformationResistance to elastic deformationQuestion 3 of 20 4. Porcelain is strongest when in a state ofneutralitycompressiontensiontorsionQuestion 4 of 20 5. Tg of impression compound is43.5 degree c100 degree c39 degree c65 degree cQuestion 5 of 20 6. role if indium in amalgam isto reduce formation of gamma 2 phaseto reduce formation of gamma phaseto reduce elease of mercury during masticationto reduce release of mercury during amalgam polishingQuestion 6 of 20 7. The chamelon effect has been portrayed by which of the ceramic restorationsCerestoreDicorCerecIn ceramQuestion 7 of 20 8. According to ADA specifications, maximum flow of Type I inlay wax at 37 degrees:10percent3percent2percent1percentQuestion 8 of 20 9. self curing acrylics for tooth restorations are least compatible with which materialcopal varnisheugenolcalcium hydroxidealcoholQuestion 9 of 20 10. which orthodontic wire shows shape memoryCo-CrNiTiTMAa-TiQuestion 10 of 20 11. When Alginate is mixed with tap water having high calcium sulfate and magnesium, what happensWeakened stone diesPermanent deformation of alginateRetardation of setting reactionAcceleration of setting reactionQuestion 11 of 20 12. of the following, most kind to the pulp iszinc phosphatesilicate cementspolycarboxylateGICQuestion 12 of 20 13. Which of the following investment exhibit green shrinkagePhosphate bondedGypsum bondedSilica bondedAll of the aboveQuestion 13 of 20 14. Addition of fillers in composite resins:Decreases polymerization shrinkageIncreases wettabilityDecreases wear resistanceReduces strengthQuestion 14 of 20 15. carnauba wax is added to basic paraffin wax toensure uniformity of batchesimprove the smoothness in moldingrender it resistant to cracking and flakingdecrease flow at mouth tempQuestion 15 of 20 16. highest water solubility is seen inzinc oxide eugenolzinc polycarboxylatezinc phosphatezinc silicophosphateQuestion 16 of 20 17. During polymerisation from monomer to polymerdensity changes from 1.19 to 0.94 and volume shrinkage 7%density changes from 0.94 to 1.19 and volume shrinkage 7%density changes from 0.94 to 1.19 and volume shrinkage 21%density changes from 1.19 to 0.94 and volume shrinkage 21%Question 17 of 20 18. One disadvantage of dental porcelain restorations is:radioactivitypoor estheticsbrittlenessexpansionQuestion 18 of 20 19. Function of molybdenum in base metal alloys?Increases strengthDecrease corrosion resistanceDecreases strengthIncrease CTEQuestion 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:secondary baseindirect baseprimary basedirect baseQuestion 20 of 20 Loading...
