Question: The polymerization of self-curing resin takes faster in______________?

• 1. Cold water
• 2. Hot water
• 3. Under pressure
• 4. In vaccum

Question: Acid-etching is done for_______________?

• 1. 30 seconds
• 2. 60 seconds
• 3. 90 seconds
• 4. 120 seconds

Question: No trail closure is necessary with which one of the technique during denture fabrication_____________?

• 1. Compression moulding technique
• 2. Injection moulding technique
• 3. Fluid resin technique
• 4. Light cured technique

Question: The function of the coupling agent in a restorative resin is to allow______________?

• 1. Adhesion of resin particles
• 2. Bonding between filler crystals
• 3. Bonding between filler and resin
• 4. Bonding between tooth and resin

Question: Which of the following constituents is common in occlusal sealants, bonding agents, composite resins ?

• 1. BIS GMA
• 2. Polymethyl methacrylate
• 3. Benzoin methyl ether
• 4. Silica filter

Question: The most important disadvantage of acrylic denture base is_______________?

• 1. porosity
• 2. Shrinkage
• 3. Tooth breakage
• 4. Water absorption

Question: Radio opacity to composite resins is rendered by_______________?

• 1. Silica glass
• 2. Organic matrix
• 3. Barium glass and strontium glasses
• 4. Fluoride particles

Question: Acrylic (cold cure)______________?

• 1. Melts at 100°C
• 2. Softens at 100°C
• 3. Still requires heat for polymerization
• 4. Produces heat during polymerization

Question: Use of dimethyl-P-toluidine is indicated for_______________?

• 1. Thermal polymerization of acrylic
• 2. Chemical polymerization
• 3. Retarding the polymerization reaction
• 4. To inhibit the action of benzoyl peroxide

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

• 1. The former have a lower molecular weight
• 2. The former have higher residual monomer content
• 3. The former are more porous
• 4. The former have greater transverse strength