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Chemical Engineering - Refractory Technology

Exercise : Refractory Technology - Section 4
41.
Refractoriness under load (RUL) of fireclay bricks (under a load of 2 kg/cm2 ) is __________ °C.
500
1000
>1350
>2000
Answer: Option
Explanation:
No answer description is available. Let's discuss.
42.
__________ of carbon blocks in the hearth of blast furnace helps in avoiding skull formation, when it becomes cold.
High thermal conductivity
Low porosity
Non-wetting characteristics
High density
Answer: Option
Explanation:
No answer description is available. Let's discuss.
43.
Bauxite calcining rotary kilns are lined with __________ bricks.
fireclay
carbon
85% alumina
corundum
Answer: Option
Explanation:
No answer description is available. Let's discuss.
44.
Use of higher percentage of lime for bonding silica bricks, reduces their
strength
abrasion resistance
both (a) & (b)
neither (a) nor (b)
Answer: Option
Explanation:
No answer description is available. Let's discuss.
45.
Grog addition in fireclay during brick manufacture is done to
reduce its shrinkage on heating.
impart greater spalling resistance.
enhance the strength of fired refractories.
all (a), (b) and (c).
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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