Chemical Engineering - Refractory Technology

31. 

Periclase is

A. crystalline form of MgO.
B. MgCO3.
C. ZrSO4.
D. amorphous magnesite.

Answer: Option A

Explanation:

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32. 

Which of the following is not a neutral refractory ?

A. Silicon carbide
B. Magnesite
C. Chromite
D. Graphite

Answer: Option B

Explanation:

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33. 

Which is a basic refractory ?

A. Fireclay
B. Silica
C. Chrome magnesite
D. None of these

Answer: Option C

Explanation:

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34. 

Cold crushing strength of a refractory does not depend upon its

A. shape
B. composition
C. firing temperature
D. texture

Answer: Option A

Explanation:

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35. 

Refractoriness under load (RUL) is the most important property for the refractory bricks

A. at the hearth bottom of the furnace on which stock is placed.
B. used for furnace insulation.
C. used in the roof of the furnace.
D. none of these.

Answer: Option A

Explanation:

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