Composite resins in comparison to acrylic have_______________? A. Low compressive strengthB. High abrasive resistance C. High water absorption D. High polymerization shrinkage

Insufficient closure of the flasks during packing of denture base resin can result in_____________? A. Poor colour stability B. Less polymerization shrinkageC. Increase in vertical dimension D. Decrease in vertical dimension

The chemical used to etch enamel is_______________? A. Zinc oxide B. Methyl methacrylateC. Phosphoric acid D. Eugenol

Which of the following procedure is indicated to produce cross-linking in the polymerization of linear chains of acrylic_______________? A. Addition of grain refining agentsB. Addition of difunctional monomers C. Increasing the amount of heat required for linear polymerization D. Incorporation…

For photo-curing the composite resin the light source______________? A. Should be held at a millimeter distance from the restoration B. Need no protection while in use C. Will cure composite upto a depth of 5 millimeter thickness D. Is fiber…

In self-cure acrylic resin, activator is_____________? A. Toluidine B. Quaternary ammonium compound C. Benzoyl peroxideD. Tertiary amine

Marginal leakage related to temperature change occurs to the greatest extent with_______________? A. Amalgam alloyB. Unfilled resin C. Composite resin D. Direct filling gold

Acrylic resins were first introduced as a denture base material in______________? A. 1925B. 1937 C. 1951 D. 1956

What is the disadvantage of using composites as restorative material ? A. Increased thermal conductivityB. Decreased wear resistance C. Decreased thermal conductivity D. None of the above

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%