Sample questions

1) In which of the following properties does a type IV partial denture gold alloy exceed a base-metal partial denture alloy in numerical value
a) hardness.
b) specific gravity.
c) casting shrinkage.
d) fusion temperature.

 

2) Within practical limits, when the water/ powder ratio is increased beyond the recommended amount in mixing plaster, the
a) setting time is increased.
b) setting expansion is decreased.
c) compressive strength is decreased.
d) all of the above.

 

3) In processing an acrylic denture in a water bath, a proper heating cycle is desired because of the possibility of
a) warpage.
b) shrinkage of the denture.
c) porosity due to boiling of the monomer.
d) crazing of the denture base around necks of the teeth.

 

4) An over load of the mucosa will occur if the
a) teeth used for replacement are nonanatomic.
b) bases covering the area are too small in out line.
c) bases covering the area are too large in out line.
d) bases covering the area are overextended distally.

 

5) In an alginate impression material, trisodium phosphate is the
a) filler.
b) reactor.
c) retarder.
d) acclerator.