1. Constituent of bioactive glass:AluminaSilicaCalcium carbonateZirconiaQuestion 1 of 20 2. test used to check setting time of impression material isrockwell testvickers testcold bend testvicat testQuestion 2 of 20 3. Enamel resin bond used forConsist of a highly filled liquid acrylic monomer mixture placed onto acid etched enamelImprove mechanical bond of resinCan be used for enamel as well as DentineIt has no role in preventing micro leakageQuestion 3 of 20 4. Continues use of vibrator during investing leads to?Surface roughnessRandom nodule formationDiscolorationSurface irregularitiesQuestion 4 of 20 5. high copper amalgams are superior to low copper amalgams because ofare workable at low mercury alloy ratiosthey have high ratio of compressive to tensile or tensile to compressive strengthshows less marginal fracturethey corrode in oral cavityQuestion 5 of 20 6. Liquid which shows thickening on increasing strain is calledThixotropicPseudoplasticNewtonianDilatantQuestion 6 of 20 7. Cutting edge of surgical burs are made from martensite form rather than austenite form due to which of the following reasonMartensite form is corrosion resistantMartensite form has less strengthMartensite form is hardMartensite form is very brittleQuestion 7 of 20 8. During final finishing of composite you find a void, what will you do:Remove entire composite and refill itFill with composite after etching, application of bonding agentLeave as it isRe-etch and fill the compositeQuestion 8 of 20 9. the penetration of the fissure sealant into the fissuresis not influenced by the wettability of the enamelis independent of the chemical composition of the enamelmust occur before the polymerisation of the materialis the result of a chemical bond between the sealant and enamelQuestion 9 of 20 10. The phenomenom where porcelain appears different under varying light conditions isRegractive opticsTransmittanceOpacificationMetamerismQuestion 10 of 20 11. Copper content of single composition alloys13-30%30-40%9-20%0-6%Question 11 of 20 12. According to the ADA classification for alloy systems used for metalceramic restorations, noble alloys:have a noble metal content of > 60%have a noble metal content of > 25%have a noble metal content of > 45%have a noble metal content of > 15%Question 12 of 20 13. Which of the following cannot be used for debridement of zirconia implant surfaceGold tip instrumentStainless steel instrumentHi grade plastic instrumentTitanium coated instrumentQuestion 13 of 20 14. the porcelain constituent that fuses at firing temperature and forms a matrix isfeldsparaluminium oxidekaolinquartzQuestion 14 of 20 15. The process in which a solid melts into a liquid with a separate crystalline phase is known as:Incongruent meltingSinteringCongruent MeltingCerammingQuestion 15 of 20 16. hydrocolloid impression material may experience all of the following exceptimbibitionssyneresisrecrystallsationhysteresisQuestion 16 of 20 17. the length of sprue formers depends primarily on thethickness of the wax patternlength of the casting ringthickness of sprue formerangle at which it is attached to the patternQuestion 17 of 20 18. the antiflux used for gold solders istitaniumcryolitegraphitesiliconQuestion 18 of 20 19. ductility meanssubjecting a cylindrical specimen to a compressive loadpercentage elongationincreases with rise in temperaturethe metal can be transformed into sheetsQuestion 19 of 20 20. Shade matching is done in what light condition:Fluorescent light at 6500KDay light at 6000KColour corrected fluorescent light at 5500KIncandescent light bulb at 2500KQuestion 20 of 20 Loading...
