DM chapter 16 Question and answer correctly solved 2024/2025
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Course
GYPSUM AND WAX
Institution
GYPSUM AND WAX
DM chapter 16 Question and answer correctly solved 2024/2025 DM chapter 16: Gypsum & Wax Products
1. Which of the following is true concerning the chemical properties of gypsum materials?
a. Chemically, the mineral gypsum is a hemihydrate of calcium carbonate.
b. To form the raw material into...
DM chapter 16: Gypsum & Wax Products
1. Which of the following is true concerning the chemical properties of gypsum
materials?
a. Chemically, the mineral gypsum is a hemihydrate of calcium carbonate.
b. To form the raw material into a powder, the manufacturer heats it and adds
water.
C. When the dihydrate is again mixed with water, a product with a viscosity
capable of flowing is produced.
d. The amount of water required to mix the calcium sulfate hemihydrate is
greater than the amount required for the chemical reaction.
D
What does it mean when freshly mixed gypsum loses its gloss?
Initial set
Final compressive strength
final set
beginning of the working time
Initial set
,Dental stone begins with _____ components.
paste and liquid
water and powder
paste and paste
liquid and powder
water and powder
The _____ the particles of gypsum powder are, the weaker and less resistant
the final product is to abrasion.
smaller, more regular, and more porous
smaller, more irregular, and denser
larger, more regular, and denser
larger, more irregular, and more porous
larger, more irregular, and more porous
, 2. Which of the following dental gypsum products will require the least for
mixing and will have the highest final density?
a. Impression plaster (Type I)
b. Model plaster (Type II)
с. Dental stone (Type III)
d. Dental stone, high strength (Type IV)
D
3. For which type of model would the dental assistant choose to use a B-
Hemihydrate?
a. die stone.
b. working casts.
c. diagnostic models.
d. dental investment.
C
4. Which material is able to withstand the high heat and stress produced when
molten metal is forced into molds to form indirect restorations?
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