Refractory Technology MCQs

212 MCQs  — Chemical Engineering MCQs  (Page 14 of 22)

Attempt Refractory Technology Quiz
Cold crushing strength of fireclay bricks is about ______________ kgf/cm2?
A. 50-100
B. 100-150
C. 200-400
D. 500-1000
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Sillimanite (Al2O3.SiO2) refractory, which is a neutral refractory, is not used in________________?
A. Pottery furnace
B. Glass melting furnace
C. Crucibles
D. Gas retorts
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Rate of slag attack on refractories increases with rise in temperature due to the___________________?
A. Decreased viscosity of slag
B. Increased thermal conductivity of brick
C. Oxidising condition in the furnace
D. None of these
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Tar bonded dolomite bricks__________________?
A. Are stored under controlled temperature & humidity to avoid hydration
B. Are used in outer lining of l.d. converters
C. Have poorer hydration resistance than pitch bonded bricks
D. All a., b. and c.
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Which furnace consumes maximum refractory annually in an integrated steel plant ?
A. Soaking pit
B. Blast furnace
C. L.d. converter
D. Coke ovens
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Which of the following bricks should not be used, if the furnace is to be used intermittently ?
A. Firebricks
B. Silica bricks
C. Silicon carbide bricks
D. Sillimanite
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Refractoriness under load (RUL) is the most important property for the refractory bricks_________________?
A. At the hearth bottom of the furnace on which stock is placed
B. Used for furnace insulation
C. Used in the roof of the furnace
D. None of these
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Ganister is a source of the ________________?
A. Silica
B. Periclase
C. Lime
D. None of these
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Which is required in an insulating refractory ?
A. High thermal conductivity
B. Low porosity
C. Both a. and b.
D. Neither a. nor b.
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Sillimanite is a _____________ refractory?
A. Basic
B. Neutral
C. High alumina
D. Insulating
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Word of the Day
23 Jul
Aisle
a passage between rows of seats in a building such as a church or theatre, an aircraft, or train.
طویل تنگ راستہ، نشتوں کے درمیان راستہ

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