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Chemical Engineering - Refractory Technology

Exercise : Refractory Technology - Section 3
26.
Which is an acidic refractory ?
Magnesite
Dolomite
Fireclay
Chrome magnesite
Answer: Option
Explanation:
No answer description is available. Let's discuss.
27.
Carborundum used for making crucibles for melting non-ferrous metals is chemically
silicon carbide
silicon nitride
crystalline magnesia
zirconium sulphate
Answer: Option
Explanation:
No answer description is available. Let's discuss.
28.
Which of the following impurities reduces the refractoriness of magnesite bricks ?
Al2O3
CaO
SiO2
all (a), (b) & (c)
Answer: Option
Explanation:
No answer description is available. Let's discuss.
29.
Crushing strength of a refractory
increases with rise in service temperature.
decreases with rise in service temperature.
is unaffected with change in service temperature.
decreases with increase in porosity.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
30.
Ramming masses are used for
obtaining monolithic working faces.
repairing construction of various furnace parts.
both (a) & (b).
neither (a) nor (b).
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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