1. a cermet is a combination of conventional and aluminous ceramic powders silver amalgam powder and glass ionomer powder feldspar and quartz the powders of polycarboxylate and composite resin cements 2. ductility means subjecting a cylindrical specimen to a compressive load increases with rise in temperature the metal can be transformed into sheets percentage elongation 3. the process of driving off the water of crystallisation of gypsum to manufacture powders of plaster and stone is called calcining crazing sintering fusing 4. Lower density usually means? High strength Low strength Lighter weight Low melting temperature 5. Best cementing medium for self retained all ceramic crown is Dual cure resin Chemical cure resin GIC RMGIC 6. the antiflux used for gold solders is cryolite silicon titanium graphite 7. Liquid which shows thickening on increasing strain is called Newtonian Dilatant Thixotropic Pseudoplastic 8. Asbestos is used as a lining in a casting ring to facilitate removal of the investment after casting. allow for expansion of the investment. prevent fracture of the investment during heating. insulate against thermal conductivity 9. Hardness of which material is more than enamel: Ceramic Gold Composite Amalgam 10. Which of the following is formed by spray atomization and chemical precipitation of molten gold Gold foil Mat gold Granular gold Crystalline gold 11. While shade matching; as the brightness becomes more intense, color appears to change. This effect is known as Munsell effect Flouroscence Bezold-Brucke effect metamerism 12. The process by which a casting is heated in a porcelain furnace to a temperature of 980″C to burn off any remaining impurities prior to adding porcelain is called: pickling degassing quenching investing 13. Material added in In-Ceram: Feldspar Lucite Kaolin Alumina 14. all of the following processes can be performed at room temp except work hardening strain hardening cold working forging 15. Which of these is moisture active adhesive? Cyanoacrylate Methyl methacrylate Bis-GMA All of the above 16. the primary oxygen scavenger in noble metal casting alloy is silver zinc iron copper 17. self curing acrylics for tooth restorations are least compatible with which material alcohol calcium hydroxide eugenol copal varnish 18. when selecting the color of cememt to use for cementing a porcelain jacket crown the powder being tested is best mixed with only water cement liquid alcohol glycerine water solution 19. Which material is sensitive to Sulfur contamination from latex gloves: Agar Addition silicone Polysulfide Polyether 20. Which of the following cements provide maximum resistance to decalcification while placing bands on molar Polycarboxylate Zinc phosphate GIC Silicate Loading … Question 1 of 20
