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Chemical Engineering - Refractory Technology

Exercise : Refractory Technology - Section 4
21.
Maximum shrinkage in volume occurring during burning/firing of dried refractories may be as high as __________ percent.
10
15
20
30
Answer: Option
Explanation:
No answer description is available. Let's discuss.
22.
Porosity of fireclay refractories is __________ percent.
5-10
10-25
25-35
35-50
Answer: Option
Explanation:
No answer description is available. Let's discuss.
23.
SiO2 percentage in firebrick is about
35-40
55-60
80-85
>94
Answer: Option
Explanation:
No answer description is available. Let's discuss.
24.
Porosity is induced in insulating refractories by adding
powdered naphthalene.
ammonium chloride/sulphate.
calcium phosphate.
all (a), (b) and (c).
Answer: Option
Explanation:
No answer description is available. Let's discuss.
25.
Magnesite bricks have poor resistance to attack by __________ slag.
lime
basic
acid
none of these
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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