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Chemical Engineering — Test 120

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Question 1
Use of higher percentage of lime for bonding silica bricks, reduces their__________________?
Question 2
Magnesite chrome refractories____________________?
Question 3
‘Super refractories’ are made from pure____________________?
Question 4
Skull is not formed on the carbon blocks in the hearth of a blast furnace, when it becomes cold, because of its_______________?
Question 5
Maximum safe working temperature for fireclay bricks is about __________ °C?
Question 6
Which is the stable form of silica between 1470°C and the melting point 1713°C ?
Question 7
Cold crushing strength of a refractory does not depend upon its ____________________?
Question 8
Thoria__________________?
Question 9
Chromite refractories are_____________________?
Question 10
Vacuum steel degassing units are lined with__________________?