Gypsum products
Quiz
•
Science, Education, Moral Science
•
KG - 5th Grade
•
Practice Problem
•
Medium

Surendar Sugumaran
Used 54+ times
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10 questions
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1.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Gypsum produced as a by-product of flue gas
desulfurization
decalcification
saphonification
dechlorinatiom
2.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
The resulting particle is a fibrous aggregate of fine crystals with capillary pores known as
plaster of Paris
Dental stone
Die stone
all
3.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
When gypsum is heated in a kettle, vat, or rotary kiln that maintains a wet environment; a crystalline hemihydrate called
dental stone
dental plaster
plaster of paris
Die stone
4.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
α-hemihydrate β-hemihydrate • Formed when dihydrate is heated under
compressed air
steam pressure
Vaccum
free oxygen
5.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Set gypsum products probably never attain 100% conversion unless they are exposed to
low humidity
high humidity
no humidity
room temperature
6.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
The colloidal theory proposes that, when mixed with water, hemihydrate enters into the colloidal state through a ________mechanism.
sol-gel
gel-gel
sol-sol
all
7.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
The hydration theory suggests that rehydrated plaster particles unite through ___________ bonding with sulfate groups to form the set material.
Covalent
hydrogen
oxygen
double
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