Question: In processing methyl methacrylate, the resin may show porosity if the flask is placed too soon porosity most likely occur_____________?

• 1. Throughout the denture
• 2. Near the borders
• 3. In the thickest part
• 4. On the denture surface

Question: Composite resins in comparison to acrylic have_______________?

• 1. Low compressive strength
• 2. High abrasive resistance
• 3. High water absorption
• 4. High polymerization shrinkage

Question: Insufficient closure of the flasks during packing of denture base resin can result in_____________?

• 1. Poor colour stability
• 2. Less polymerization shrinkage
• 3. Increase in vertical dimension
• 4. Decrease in vertical dimension

Question: Subsurface porosity is due to_____________?

• 1. Thermal changes
• 2. Thickness of the resin
• 3. Lack of temperature
• 4. Packing past the dough stage

Question: If resin is packed in sandy stage what will be seen in the processed denture ?

• 1. Distortion
• 2. Porosity
• 3. Inhomogeneous colour
• 4. Increased strength

Question: Which one of the following is used as filler in composite resins ?

• 1. Quartz
• 2. Silicates
• 3. Zinc particles
• 4. Aluminium

Question: The chemical used to etch enamel is_______________?

• 1. Zinc oxide
• 2. Methyl methacrylate
• 3. Phosphoric acid
• 4. Eugenol

Question: Which of the following procedure is indicated to produce cross-linking in the polymerization of linear chains of acrylic_______________?

• 1. Addition of grain refining agents
• 2. Addition of difunctional monomers
• 3. Increasing the amount of heat required for linear polymerization
• 4. Incorporation of terminating agents

Question: For photo-curing the composite resin the light source______________?

• 1. Should be held at a millimeter distance from the restoration
• 2. Need no protection while in use
• 3. Will cure composite upto a depth of 5 millimeter thickness
• 4. Is fiber optic

Question: In self-cure acrylic resin, activator is_____________?

• 1. Toluidine
• 2. Quaternary ammonium compound
• 3. Benzoyl peroxide
• 4. Tertiary amine