1. Phosphate bonded investment is made carbon free:For easier divesting of investmenTo prevent staining of ceramicTo produce smooth castingTo prevent brittleness of alloyQuestion 1 of 20 2. the function of monomer added to the heat curing resin polymer is primarily toprovide adhesion of the resin base to the teethreduce the porosity and increase the strength of the appliancestart the polymerisation reactionproduce a plastic mass that can be packed into the moldQuestion 2 of 20 3. Which material is sensitive to Sulfur contamination from latex gloves:Addition siliconePolysulfideAgarPolyetherQuestion 3 of 20 4. Contact angle between liquid and adherend surface is 180 degree. This suggestsGood wettingPoor wettingCompletely non wettingnone of the aboveQuestion 4 of 20 5. Strength of gypsum is measured asGreen strengthCompressive strengthTensile strengthWet strengthQuestion 5 of 20 6. the strength of gypsum bonded investment is dependednt uponcopper contentcarbon contentgypsum contentsilica contentQuestion 6 of 20 7. carnauba wax is added to basic paraffin wax toimprove the smoothness in moldingrender it resistant to cracking and flakingdecrease flow at mouth tempensure uniformity of batchesQuestion 7 of 20 8. Hardness of which material is more than enamel:CompositeGoldAmalgamCeramicQuestion 8 of 20 9. the working time of a phosphate investment mix can be increases by increasing theliquid /powder ratiomixing time and mixing efficiencytempperature of the mixall of the aboveQuestion 9 of 20 10. Which investment shows high contraction due to loss of water and alcohol:Phosphate bonded investmentMg bondedGypsum bondedSilicate bondedQuestion 10 of 20 11. in an alginate impression material trisodium phosphate is theretarderreactorfilleracceleratorQuestion 11 of 20 12. which cement has the highest modulus of elasticityzinc polyreinforced ZOEzinc phosphatezinc polycaroxylateglass ionomer cementQuestion 12 of 20 13. the main advantage of a natural glaze rather than an applied glaze is that the natural glazeis easier to achieveis more permanentrequires a lower firing temperatureoffers best estheticsQuestion 13 of 20 14. Ceramic is known for which property:OpaqueTranslucencyColourTransparencyQuestion 14 of 20 15. gypsum investments disintegrates at700 degree C140 degree C195 degree C200 degree CQuestion 15 of 20 16. During final finishing of composite you find a void, what will you do:Fill with composite after etching, application of bonding agentRemove entire composite and refill itLeave as it isRe-etch and fill the compositeQuestion 16 of 20 17. the restorative material having hardness nearest to that of enamel isamalgamsilicate cementmicrofilled composite resindirect filling goldQuestion 17 of 20 18. Following is added to zinc polycarboxylate to improve its manageability:Stannous fluorideAluminium oxideStrontium fluorideMagnesium oxideQuestion 18 of 20 19. Most common accelerator used in gypsum is:2% sodium sulphateSodium Chloride2% potassium sulphate1 % potassium sulphateQuestion 19 of 20 20. Structural durability is a?Biological phenomenonNone of the aboveMechanical phenomenonStructural phenomenonQuestion 20 of 20 Loading...