27.
Which type of impression material expands and contracts with no change in
structure or shape?
a. Rigid.
b. Elastic.
c.
Thermoplastic.
28.
Calcium sulfate is the chemical reactor for:
a. Silicone.
b. Elastomeric impression materiall.
c.
Alginate-type hydrocolloid.
d. Impression wax.
29.
Select the impression material that uses water and powder in a one to one ratio.
a. Elastomeric impression material.
b. Modeling plastic.
c.
Sticky wax.
d. Impression paste.
e. Alginate-type hydrocolloid.
MD0502
3-19