Question: Gelation temparature of agar is between________________?

• 1. 20°C to 25°C
• 2. 27°C to 33°C
• 3. 37°C to 50°C
• 4. 55°C to 60°C

Question: Brush heap structure is found in______________?

• 1. Zinc oxide impression material
• 2. Agar
• 3. Condensation silicone
• 4. Polyether

Question: Masterial causing minimum tissue distortion is______________?

• 1. Polysulphide
• 2. Silicone
• 3. Impression plaster
• 4. Zinc oxide eugenol paster

Question: Inelastic impression material is_____________?

• 1. Impression compound
• 2. Alginate
• 3. Agar-agar
• 4. Polyether

Question: One of the most important advantages of truly elastic impression material would be its capacity for______________?

• 1. Close adaptation to soft tissues
• 2. With drawl without permanent distortion
• 3. Reproduction of surface details
• 4. Compatibility with gypsum products

Question: Impression compound base_____________?

• 1. Low thermal conductivity
• 2. Crystalline structure
• 3. Formation of cross linkage with heating
• 4. High fusion temperature

Question: Hypersensitivity reactions like contact dermatitis can be caused by______________?

• 1. polysulfides
• 2. Condensation silicones
• 3. addition silicones
• 4. Polyether

Question: Trisodium phosphate in alginate acts are_______________?

• 1. Retarder
• 2. Reactor
• 3. Accelerator
• 4. Plasticizer

Question: Which of the following impression material is elastic________________?

• 1. Impression compound
• 2. Zinc Oxide eugenol (ZOE) paste
• 3. Wax
• 4. Polyvinyl siloxane

Question: The American dental association (ADA) specification number for non-aqueous elastomeric dental impression material is______________?

• 1. 19
• 2. 20
• 3. 21
• 4. 26