1. Which of these is moisture active adhesive?Bis-GMAMethyl methacrylateAll of the aboveCyanoacrylateQuestion 1 of 20 2. tartaric acid in GIC is added toreduce viscosityincrease flow of materialincrease working timemodify handling propertiesQuestion 2 of 20 3. Tg of impression compound is65 degree c39 degree c43.5 degree c100 degree cQuestion 3 of 20 4. Which material is sensitive to Sulfur contamination from latex gloves:PolysulfideAgarAddition siliconePolyetherQuestion 4 of 20 5. Metal oxides are added to powder of porcelain forIncreased strength; act as a refractory skeletonGive color, increase strengthGive color , decrease strengthDecrease strength; act as a refractory skeletonQuestion 5 of 20 6. the working time of a phosphate investment mix can be increases by increasing theliquid /powder ratiotempperature of the mixall of the abovemixing time and mixing efficiencyQuestion 6 of 20 7. The main component of gypsum bonded investment which provides thermal expansion to compensate for alloy solidification shrinkage isRefractory fillerNone of the aboveModifiers like magnesium oxide and sodium chlorideBinderQuestion 7 of 20 8. There are four types of gypsum products approved for use in dentistry. Which of the following types is used rarely today?Type IIType IVType IType IIIQuestion 8 of 20 9. each crystal of the polycrystalline metal is termedseedbushgraindendriteQuestion 9 of 20 10. Fluoride flux used in soldering works by Forms a protective film during solderingWeakens the solder jointPrevents formation of chromium oxide or dissolves already formed chromium oxidePreventing flow of solder to other areasQuestion 10 of 20 11. Stress is:Force applied perpendicular to the surfaceAn internal force opposing an applied loadA deformation resulting from an applied loadForce applied per unit areaQuestion 11 of 20 12. Ceramic is known for which property:ColourTranslucencyOpaqueTransparencyQuestion 12 of 20 13. bonding of GIC to tooth structure is brought about bycarboxyl groupfine pumicemetal ionshydroxyl groupQuestion 13 of 20 14. the antiflux used for gold solders issilicontitaniumcryolitegraphiteQuestion 14 of 20 15. For obtaining harder dies to be used for making wax patterns, all of the following can be done exceptGold plating of dieAddition of die hardener to gypsumUse an epoxy resin based dieSilver plating of dieQuestion 15 of 20 16. A system of manufacturing copings from blocks of pure titanium by machine duplication and spark erosion isInceramEmpressProceraCaptekQuestion 16 of 20 17. One disadvantage of dental porcelain restorations is:poor estheticsexpansionradioactivitybrittlenessQuestion 17 of 20 18. Temp at which tertiary amine activates benzoyl peroxide release free radicals50?C25? C37?C60?CQuestion 18 of 20 19. Strength of gypsum is measured asGreen strengthTensile strengthCompressive strengthWet strengthQuestion 19 of 20 20. role of flux in soldering isrestrict the flow of solderto preheatto melt the solderremoves oxideQuestion 20 of 20 Loading...