Refractory Technology MCQs

212 MCQs  — Chemical Engineering MCQs  (Page 19 of 22)

Attempt Refractory Technology Quiz
With decrease in porosity, the ______________ of the refractories decreases?
A. Strength
B. Thermal conductivity
C. Spalling resistance
D. None of these
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______________ bricks should not be used in oxidising atmosphere?
A. Tar dolomite
B. Carbon
C. Silica
D. Fireclay
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Magnesite bricks have poor resistance to attack by _____________ slag?
A. Lime
B. Basic
C. Acid
D. None of these
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Which is not a natural insulating material ?
A. Diatomaceous earth/kieselgur
B. Asbestos
C. Vermiculite
D. None of these
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Which of the following is not a high alumina refractory material ?
A. Kyanite
B. Sillimanite
C. Diaspore
D. Periclase
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___________________ is the measure of the strength of refractory under the combined effect of temperature & load ?
A. Porosity
B. Rul
C. Specific gravity
D. Thermal conductivity
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Which one contains minimum percentage of SiO2 ?
A. Firebrick
B. Sillimanite
C. Semi-silica
D. Aluminous firebrick
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Pure bauxite is the best raw material for the manufacture of high alumina refractories, in which maximum alumina content can be as high as _____________ percent?
A. 55
B. 70
C. 80
D. 90
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Mullite is chemically represented by_________________?
A. Al2o3. 2sio2
B. 3al2o3. 2sio2
C. Al2o3. sio2
D. 2al2o3. 3sio2
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High alumina refractory compared to fireclay bricks have____________________?
A. Less load bearing capacity
B. Less resistance to slag attack
C. Low refractoriness
D. High resistance to thermal shock and creep
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Word of the Day
22 Jul
Combative
ready or eager to fight or argue.
لڑاکا، متنازع، جھگڑالو

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