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Chemical Engineering - Refractory Technology

Exercise : Refractory Technology - Section 2
1.
The linear thermal expansion of __________ bricks upto 1000 °C is very low of the order of ≤ 0.5 percent.
fireclay
silica
magnesite
corundum
Answer: Option
Explanation:
No answer description is available. Let's discuss.
2.
Fusion point of an acidic refractory material is
increased by the addition of basic oxides.
reduced by the addition of basic oxides.
not affected by the addition of basic oxides.
always more than 2500°C.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
3.
Which is required in an insulating refractory ?
High thermal conductivity
Low porosity
Both (a) and (b)
Neither (a) nor (b)
Answer: Option
Explanation:
No answer description is available. Let's discuss.
4.
'Super refractories' are made from pure
carbides
oxides
borides
nitrides
Answer: Option
Explanation:
No answer description is available. Let's discuss.
5.
Chromite refractories are
acidic refractory.
neutral refractory.
basic refractory.
fired at a temperature of 600°C only.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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