1. Maximum shrinkage occurs in which stage: Low bisque High bisque Medium bisque All stages show equal shrinkage 2. After mixing powder and liquid in case of alginate impression material, gelation will occur in what time (at room temperature)? 3-4 minutes 6-7 minutes 10-12 minutes 1-2 minutes 3. Which of the following statements is not true regarding glass ionomer cements? high solubility after initial setting release fluoride thermal expansion similar to tooth good thermal insulator 4. Which of the following will produce the most rigid restoration for framework of same dimension Cobalt chrome alloys Wrought alloy Partial denture casting gold in hardened condition Palladium alloys 5. dental plaster powder and dental stone powder differ mainly in solubility particle porosity chemical formula shelf life 6. which of the following is not a nobel metal silver osmium ruthenium gold 7. Use of type II ZOE cement: Intermediate restoration Temporary restoration Temporary cementation Permanent cementation 8. Brush heap structure is seen in: Alginate Impression compound Polyethers Addition silicones 9. Camouflage is a property of which ceramic? Cerastone All Dicor Cerec 10. Polysulfide impression material should be: poured within 1 hour poured immediately poured within 30 minutes poured within 15 minutes 11. the process of driving off the water of crystallisation of gypsum to manufacture powders of plaster and stone is called fusing crazing sintering calcining 12. each crystal of the polycrystalline metal is termed grain dendrite seed bush 13. According to ADA specifications, maximum flow of Type I inlay wax at 37 degrees: 3percent 10percent 1percent 2percent 14. methyl methacrylate can be activated by all of the following except lead peroxide sulfuric acid derivatives heat tertiary amines 15. Microwave polymerisation for Acrylic dentures uses: Magnetic Field Heat Convection Heat Conduction Radiation 16. maximum shrinkage of firing of ceramic occurs during which stage high bisque medium bisque none of the above low bisque 17. In orthodontic stainless steel wire, content of carbon is 0.6 -0.8 percent 12-20 percent 6-8 percent 1-1.2 percent 18. During polymerisation from monomer to polymer density changes from 0.94 to 1.19 and volume shrinkage 7% density 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% 19. Effects associated with cold working i.e lowered ductility and distorted grains can be eliminated by process known as Strain hardening Eutectic Concentricity Annealing 20. Animal test used to check biocompatibility of dental material is all except LD50 test Ame’s test Implantation test buehlar test Loading … Question 1 of 20
