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Chemical Engineering - Refractory Technology

Exercise : Refractory Technology - Section 4
26.
Zirconia refractories are not used in
making sheaths for thermocouple.
lining high temperature ceramic kilns.
furnaces subjected to fluctuating temperature.
high frequency induction furnaces in the form of inductors.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
27.
Carbon refractories
do not burn/oxidise, when exposed to air on heating.
are not attacked by slags, as they are not wetted by melts.
do not resist temperature fluctuations.
have extremely low thermal & electrical conductivities.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
28.
Magnesite refractories have low resistance to
attack by basic slag.
abrasion.
disintegration on sudden change of temperature.
both (b) and (c).
Answer: Option
Explanation:
No answer description is available. Let's discuss.
29.
Which property is important for bricks used in the combustion chamber & dome of blast furnace stoves ?
High refractoriness.
High resistance to spalling.
High strength and density.
All (a), (b) and (c).
Answer: Option
Explanation:
No answer description is available. Let's discuss.
30.
The maximum linear expansion of silica bricks during firing is about __________ percent.
0.5
1
2
3.5
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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