In self-cure acrylic resin, activator is_____________?

Related Mcqs:

1. To prevent porosity in self-cure acrylic resin, curing should be carried in______________?

   A. Cold water
   B. Hot water
   C. Under tap water
   D. Under vacuum pressure

2. To cure a heat cure resin, a proper heating cycle is necessary_____________?

   A. To prevent the porosity
   B. To prevent warpage
   C. To prevent volume expansion
   D. All of the above

3. Acrylic (cold cure)______________?

   A. Melts at 100°C
   B. Softens at 100°C
   C. Still requires heat for polymerization
   D. Produces heat during polymerization

4. Cold cure acrylic expand in water by___________?

   A. 1% by volume 0.23% by weight
   B. 10% by volume 0.23% by weight
   C. 0.1% by volume 0.23% by weight
   D. None of the above

5. In heat cure denture base acrylic resins the monomer is___________?

   1. Methacrylate
   2. Ethylmethacrylate
   3. Methyl ethyl methacrylate
   4. Polymethylmethacrylate

6. The % of free monomer in a heat – cured acrylic resin is_______________?

   A. 3% to 5%
   B. 8% to 10%
   C. 0.2% to 0.5%
   D. 0.6% to 0.8%

7. During polymerisation of acrylic resin, above what temperature benzoyl peroxide form freeradicals_______________?

   A. 25°C
   B. 37°C
   C. 50°C
   D. 60°C

8. Which of the following may result if an excessive amount of monomer is incorporated into an acrylic resin mixture ?

   A. Excessive expansion
   B. Low impact strength
   C. Excessive shrinkage
   D. Excessive brittleness

9. One of the claims for the superiority composite resin restoration over silicate cement restorations is that the resin restorations_____________?

   A. Prevent galvanic action
   B. Are practically insoluble in oral fluids
   C. Adapt to the walls of the cavity better
   D. Have a higher coefficient of thermal expansion

10. All of the following statements about the differences between self-polymerizing acrylic resins and heat-cured resins are true EXCEPT______________?

    A. The former have a lower molecular weight
    B. The former have higher residual monomer content
    C. The former are more porous
    D. The former have greater transverse strength