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Chemical Engineering - Refractory Technology

Exercise : Refractory Technology - Section 5
1.
The main raw material for manufacture of silicon carbide refractories is
corrundum
carborundum
bauxite
periclase
Answer: Option
Explanation:
No answer description is available. Let's discuss.
2.
Chromite refractories are used in
bottom of soaking pits.
between acid & basic linings in basic open hearth furnaces to prevent their chemical action with each other.
both (a) & (b)
neither (a) and (b)
Answer: Option
Explanation:
No answer description is available. Let's discuss.
3.
Which of the following has the lowest electrical resistivity ?
Graphite
Fireclay
Alumina
Zircon
Answer: Option
Explanation:
No answer description is available. Let's discuss.
4.
Dry mix hydraulic compositions of refractory aggregates with suitable bonding materials are called refractory
mortars
cements
castables
none of these
Answer: Option
Explanation:
No answer description is available. Let's discuss.
5.
Silica bricks have low spalling resistance below 600°C, due to its
very high thermal conductivity.
high co-efficient of expansion upto this temperature.
high thermal diffusivity.
low refractoriness.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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