Question: Powdered gold is___________________?
- 1. Made by a combination of chemical precipitation and atomization
- 2. Made by electrolytic precipitation
- 3. Made by beating pure gold at high temperatures
- 4. Made by milling pure gold ingots
Question: Which of the following is true about direct filling gold______________?
- 1. Properly condensed mat gold has no voids
- 2. Whatever may be the type voids are inherent
- 3. Voids can be avoided with manual condensation
- 4. None of the above
Question: The malleting force is directed______________?
- 1. Perpendicular to the walls
- 2. Parallel to long axis of crown
- 3. 45° to the wall
- 4. None of the above
Question: Pitting of direct filling old restoration usually results from_________________?
- 1. Using contaminated gold foil
- 2. Poor finished preparation
- 3. Improper stepping of condenser point
- 4. Using small condenser point
Question: The cohesive gold used as bulk filler is_____________?
- 1. Electra alloy
- 2. Mat gold
- 3. Spherical gold
- 4. Gold foll
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
