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Gypsum and Lime Definitions Quiz

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Questions and Answers

What is the unique property of gypsum mentioned in the text?

It can easily be shaped and moulded when water is added (correct)

It can be easily scratched by a finger nail

It can be heated to turn into powder

It is classified according to burning and strength

How is low burning type gypsum manufactured?

By heating dehydrated gypsum to about 160°C (correct)

By burning dehydrated gypsum at 700°C–1000°C

By grinding natural gypsum rock at high pressure

By adding water to the gypsum powder at normal pressure

What is the characteristic of extra strong gypsum according to the text?

It is used for manufacture of moulds (correct)

It is obtained by grinding natural gypsum rock at normal pressure

It is very hygroscopic and porous

It is heated at a temperature of 160°C–180°C

At what temperature is the raw gypsum material heated during the manufacture of gypsum?

<p>Up to 200°C</p> Signup and view all the answers

What happens when heated, according to the text?

<p>The chemically bound water is lost totally</p> Signup and view all the answers

Study Notes

Gypsum Properties and Manufacturing

Gypsum has a unique property of losing ¾ of its water content when heated

Low Burning Type Gypsum Manufacturing

Low burning type gypsum is manufactured by heating raw gypsum material at a higher temperature

Extra Strong Gypsum Characteristics

Extra strong gypsum has a higher compressive strength than regular gypsum

Gypsum Manufacturing Process

Raw gypsum material is heated at a temperature of 150°C during manufacturing
When heated, raw gypsum material loses its water content and turns into a hemihydrate or anhydrous form

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Description

Test your knowledge about gypsum and lime with this quiz. Learn about the properties and uses of gypsum as a non-hydraulic binder and its unique ability to mould when heated and shaped.