1. diamond particle size of 125-150 um is catagorised asextrafinecoarsefinemediumQuestion 1 of 20 2. There are four types of gypsum products approved for use in dentistry. Which of the following types is used rarely today?Type IIType IIIType IType IVQuestion 2 of 20 3. Inlay wax suitable for making indirect pattern isType IIIAny of the aboveType IIType IQuestion 3 of 20 4. bonding of GIC to tooth structure is brought about byhydroxyl groupfine pumicemetal ionscarboxyl groupQuestion 4 of 20 5. What chemical is added to prevent polymerization of polymethylmethacrylate during storage:Benzoyl peroxideTertiary aminesHydroquinoneCamphorquinoneQuestion 5 of 20 6. Which of the following is true statements regarding the polishing of amalgam?it should be done with a dry polishing powderit should be done about 10 minutes after placementit prevents tarnishing of the restorationocclusion should not be checked prior to polishingQuestion 6 of 20 7. Maximum flow of Type I inlay wax at 45 degrees:10percent3percent2 percent70percentQuestion 7 of 20 8. Which property of composites is most affected by the size and number of fillers:Thermal contractionThermal expansionPolymerization shrinkageWater sorptionQuestion 8 of 20 9. the strength of gypsum bonded investment is dependednt uponsilica contentcopper contentgypsum contentcarbon contentQuestion 9 of 20 10. Polysulfide impression material should be:poured within 15 minutespoured within 1 hourpoured immediatelypoured within 30 minutesQuestion 10 of 20 11. A system of manufacturing copings from blocks of pure titanium by machine duplication and spark erosion isInceramEmpressCaptekProceraQuestion 11 of 20 12. During polymerisation from monomer to polymerdensity changes from 1.19 to 0.94 and volume shrinkage 21%density changes from 1.19 to 0.94 and volume shrinkage 7%density changes from 0.94 to 1.19 and volume shrinkage 21%density changes from 0.94 to 1.19 and volume shrinkage 7%Question 12 of 20 13. Use of type II ZOE cement:Temporary cementationTemporary restorationPermanent cementationIntermediate restorationQuestion 13 of 20 14. Dental porcelain is manufactured by a process known asCrystallisationFrittingDevitrificationCreaming and bisque bakeQuestion 14 of 20 15. Pyroplastic flow in dental porcelainShould optimally be highIs decreased with a low soda/potash ratioIs determined by potash formIs not an important considerationQuestion 15 of 20 16. Purpose of reservior is toHelp in removal of waxGives smooth polished surfacePrevent removal of molten metalPrevent localised shrinkage porosityQuestion 16 of 20 17. Copper content of single composition alloys0-6%9-20%30-40%13-30%Question 17 of 20 18. Cutting edge of surgical burs are made from martensite form rather than austenite form due to which of the following reasonMartensite form is hardMartensite form is corrosion resistantMartensite form has less strengthMartensite form is very brittleQuestion 18 of 20 19. in size the largest porosities in a casting are of which typesuck backmicroporositypin holegas inclusionQuestion 19 of 20 20. Mercaptan are a component of:Addition siliconePolysulphidePolyetherCondensation siliconeQuestion 20 of 20 Loading...