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Test your knowledge of gypsum manufacturing processes and its chemical compositi...

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Test your knowledge of gypsum manufacturing processes and its chemical compositi...

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Questions and Answers

What is the chemical formula of gypsum?

CaSO4·H2O

CaSO3·2H2O

CaSo4·2H2O (correct)

CaSO4

Which type of gypsum is known as dental stone?

Type II

Type V

Type IV

Type III (correct)

Which variety of gypsum has bigger, irregular, spongy or porous particles?

Type III gypsum

Type II gypsum

β-hemihydrate (correct)

α-hemihydrate

At what temperature does β-hemihydrate gypsum undergo calcination?

110-130°C Signup and view all the answers

How is Type II gypsum obtained?

By heating fine powder of gypsum in an open pan or kettle Signup and view all the answers

What is the chemical composition of gypsum in its dihydrate form?

CaSO4·2H2O Signup and view all the answers

What is Type I gypsum commonly known as?

Impression plaster Signup and view all the answers

At what temperature range does gypsum become an anhydrate that is soluble?

130-200°C Signup and view all the answers

Which type of gypsum is known for being more dense and less porous?

α-hemihydrate Signup and view all the answers

What type of gypsum is Type IV also known as?

Improved stone Signup and view all the answers