Refractory Technology — Test 1
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Question 1
Lessing ring is formed by the addition of a partition across the centre of a raschig ring, which results in an area increase of about ______________ percent?
Question 2
In chemical process equipments, the conical bottom heads used, usually has an apex angle of____________________?
Question 3
Si percentage in silica refractories used in the walls of coke oven is about______________________?
Question 4
Chrome magnesite bricks are_________________?
Question 5
Maximum shrinkage in volume occurring during burning/firing of dried refractories may be as high as ______________ percent?
Question 6
Which of the following consumes the maximum tonnage of refractories annually in an integrated steel plant ?
Question 7
Lower part of hot metal mixer are lined with _____________ bricks?
Question 8
Bauxite calcining rotary kilns are lined with ________________ bricks?
Question 9
Spalling of a refractory means its____________________?
Question 10
The linear thermal expansion of _______________ bricks upto 1000 °C is very low of the order of ≤ 0.5 percent?