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1. Impression
Materials in
Dentistry

2. # The zinc oxide eugenol impression pastes harden by :
A. Chemical reaction
B. Cold
C. Heat
D. Pressure

3. # The zinc oxide eugenol impression pastes harden by :
A. Chemical reaction
B. Cold
C. Heat
D. Pressure

4. # Fourth state of matter is:
A. Solid
B. Liquid
C. Gas
D. Colloid

5. # Fourth state of matter is:
A. Solid
B. Liquid
C. Gas
D. Colloid

6. # All of the following statements about type II silicon
impression material are true except :
A. They evolve hydrogen when cast if they are not fully cured
B. They exhibit a very low setting shrinkage
C. They have a lower tear resistance than polysulphide
rubbers
D. They set by condensation polymerisation

7. # All of the following statements about type II silicon
impression material are true except :
A. They evolve hydrogen when cast if they are not fully cured
B. They exhibit a very low setting shrinkage
C. They have a lower tear resistance than polysulphide
rubbers
D. They set by condensation polymerisation

8. # All of the following statements about an alginate
impression are true except :
A. It should be rapidly displaced from the mouth
B. It may exhibit fluid exudates on the surface as a result of
imbibition of water
C. It will take up water and expand if kept wet
D. It will shrink as a result of syneresis

9. # All of the following statements about an alginate
impression are true except :
A. It should be rapidly displaced from the mouth
B. It may exhibit fluid exudates on the surface as a result of
imbibition of water
C. It will take up water and expand if kept wet
D. It will shrink as a result of syneresis

10. # All of the following can be used to slow down the setting of
zinc oxide eugenol impression paste except :
A. adding a small amount of glycerine
B. Adding a small amount of water
C. Altering the amount of the two pastes used
D. Cooling mixing slab

11. # All of the following can be used to slow down the setting of
zinc oxide eugenol impression paste except :
A. adding a small amount of glycerine
B. Adding a small amount of water
C. Altering the amount of the two pastes used
D. Cooling mixing slab

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