In heat cure denture base acrylic resins the monomer is___________?

Related Mcqs:

1. Acrylic resins were first introduced as a denture base material in______________?

   A. 1925
   B. 1937
   C. 1951
   D. 1956

2. 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

3. 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

4. The most important disadvantage of acrylic denture base is_______________?

   A. porosity
   B. Shrinkage
   C. Tooth breakage
   D. Water absorption

5. 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%

6. Acrylic (cold cure)______________?

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

7. In self-cure acrylic resin, activator is_____________?

   A. Toluidine
   B. Quaternary ammonium compound
   C. Benzoyl peroxide
   D. Tertiary amine

8. 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

9. 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

10. 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