Question: Heavy and light body impression materials are use with______________?

• 1. Mercaptan
• 2. Silicone
• 3. Reversible hydrocolloid
• 4. A and B

Question: Before pouring an elastic impression it is washed with slurry of water and stone to______________?

• 1. Increase gel strength
• 2. Prevent syneresis
• 3. Prevent distortion
• 4. Wash off saliva on impression

Question: The basic constituent of reversible hydrocolloid impression material is________________?

• 1. Agar
• 2. Alginic acid
• 3. Gelatin
• 4. alginate

Question: Sol – gel transformation is seen in________________?

• 1. Impression plaster
• 2. Hydrocolloids
• 3. Elastomer
• 4. Impression compound

Question: Setting time of ZOE is best controlled by______________?

• 1. Adding a drop of eugenol
• 2. Adding a drop of water
• 3. Cooling the glass slab
• 4. Altering ratio of two pastes

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