1. Which material is sensitive to Sulfur contamination from latex gloves:AgarPolyetherPolysulfideAddition siliconeQuestion 1 of 20 2. role of flux in soldering isremoves oxideto preheatrestrict the flow of solderto melt the solderQuestion 2 of 20 3. the heat treatment of soaking the alloy at a high temp to produce a solid solution followed by quenching is known asstrain hardening heat treatmentage hardeningsolution heat treatmentliquid heat treatmentQuestion 3 of 20 4. the most important mechanical property involved when a base metal partial denture clasp is adjusted iselongationelastic imittensile strengthhardnessQuestion 4 of 20 5. Etching of feldspathic ceramic:35% Phosphoric acidHCLHF acidHN03Question 5 of 20 6. In orthodontic stainless steel wire, content of carbon is0.6 -0.8 percent1-1.2 percent12-20 percent6-8 percentQuestion 6 of 20 7. an amalgam is an alloyof two or more metalsone of whose consituent is silverone of those whose constituent is mercuryof silver and tinQuestion 7 of 20 8. Primer which etches and primes dentin is known as:Auto etch adhesiveTwo step systemSelf etch adhesiveSelf etching primerQuestion 8 of 20 9. Polishing agent which is known as whitening agentIron oxideRougeNone of the aboveChromium oxideQuestion 9 of 20 10. what filler is used in impression compound "alginate"sodium bicarbonatecalcium alginatesodium phosphatediatomaceous earthQuestion 10 of 20 11. Cerrobend alloy ishigh fusing metal for positioning or shielding stentlow fusing material for removing memory patternslow fusing metal for positioning or shielding stenthigh fusing metal for removing memory patternsQuestion 11 of 20 12. Which of the following statements is not true regarding glass ionomer cements?release fluoridegood thermal insulatorhigh solubility after initial settingthermal expansion similar to toothQuestion 12 of 20 13. role if indium in amalgam isto reduce release of mercury during amalgam polishingto reduce formation of gamma 2 phaseto reduce elease of mercury during masticationto reduce formation of gamma phaseQuestion 13 of 20 14. In mixing dental stone, why should the powder be sprinkled onto the water in the bowl?this is not recommended; the water should be added to the powderthe powder is added to the water to avoid using more than one bowlthis process results in better powder mixing and reduced chance for air bubblesthe addition of powder prevents the mix from becoming exothermicQuestion 14 of 20 15. The relative amount of lightness or darkness in a color is referred to as:hueintensitychromavalueQuestion 15 of 20 16. Phosphate bonded investment is made carbon free:To produce smooth castingTo prevent brittleness of alloyFor easier divesting of investmenTo prevent staining of ceramicQuestion 16 of 20 17. Principle purpose of annealing isTo eliminate strain hardeningTo remove the absorbed gasTo change metal metallographicallyTo make the gold cohesiveQuestion 17 of 20 18. Least soluble cement in water:SilicateZinc oxide eugenolZinc phosphateGICQuestion 18 of 20 19. dental impression compound is characterised by having arelatively low thermal conductivitycross linkage reaction upon heatingcrystalline atomic structurespecific melting pointQuestion 19 of 20 20. One disadvantage of dental porcelain restorations is:poor estheticsbrittlenessexpansionradioactivityQuestion 20 of 20 Loading...
