Question: Impression plaster is_____________?
- 1. Less compressive than alginate
- 2. More compressive than alginate
- 3. As compressive as alginate
- 4. More compressive than hydrocolloids
Question: Vulcanization refers to the setting of__________________?
- 1. Reversible hydrocolloid
- 2. Mercaptan impression material
- 3. Zinc Phosphate cement
- 4. Zinc oxide-eugenol
Question: Impression techniques are used for recording________________?
- 1. Oral mucosal tissues
- 2. Dental hard tissues
- 3. Oral mucosal tissues and dental hard tissues
- 4. None of the above
Question: Syneresis seen in hydrocolloid gel is______________?
- 1. Seen as water loss
- 2. Water absorption
- 3. Shrinkage
- 4. Gelation
Question: Best material for duplicating cast is_______________?
- 1. Agar-agar
- 2. Alginate
- 3. Zinc oxide eugenol
- 4. Plaster of paris
Question: The base paste of the condensation poly sillicone has a low molecular weight dimethyl siloxane with a terminal-group_______________?
- 1. Marcaptan group
- 2. Hydroxyl group
- 3. Silane group
- 4. Virryl group
Question: Hysteresis in a hydrocolloid gel is______________?
- 1. Moisture absorption
- 2. Temperature lag between gelation and liquefaction temperature
- 3. Phenomenon of conversion of gel into sol
- 4. All of the above
Question: All of the following can be used to slow down the setting of Zinc oxide eugenol impression paste EXCEPT_________________?
- 1. Adding a small amount of glycerine
- 2. Adding a small amount of water
- 3. Altering the amounts of the two pastes used
- 4. Cooling mixing slab
Question: All of the following statements about Type II silicon impression material are true EXCEPT_______________?
- 1. They evolve hydrogen when cast if they are not fully cured
- 2. They exhibit a very low setting shrinkage
- 3. They have a lower tear resistance than polysulphide rubbers
- 4. They set by condensation polymerisation
Question: The Zinc oxide-eugenol impression pastes harden by________________?
- 1. Chemical reaction
- 2. Cold
- 3. Heat
- 4. Pressure
