Chemical Engineering MCQs

6108 MCQs  (Page 349 of 611)

Attempt Chemical Engineering Quiz
With increase in the density of silica refractories, its_______________?
A. Resistance to slag attack increases
B. Spalling resistance reduces
C. Both a. and b.
D. Neither a. nor b.
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Mixing of ground refractory material and water is done in a ______________ mill?
A. Pug
B. Ball
C. Tube
D. Rod
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Silicon carbide refractories are used in the _____________?
A. Muffle furnace
B. Zinc smelting furnace
C. Ceramic recuperators
D. All a., b. and c.
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Firing temperature of magnesite bricks is about _____________ °C?
A. 800-1000
B. 1000-1200
C. 1600-1800
D. 2400-2600
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Which of the following is not an acidic refractory?
A. Silica bricks
B. Fireclay bricks
C. Bauxite bricks
D. Magnesia bricks
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Grog__________________?
A. Contains both alumina and silica
B. Is crushed firebrick
C. Is a non-plastic material
D. All a., b. and c.
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Except _____________, all other refractories are bad conductors of electricity (i.e, have low electrical conductivity)?
A. Fireclay
B. Carborundum
C. Graphite
D. Chromite
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Refractoriness of a typical silica brick corresponds to Segar cone number, ’32’, which is equivalent to a temperature of _____________ °C?
A. 1380
B. 1520
C. 1710
D. 1915
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With increase in the alumina content in firebricks, its fusion point (refractoriness) ?
A. Decreases linearly
B. Remains unchanged
C. Increases
D. Decreases
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Insulating refractories should have_______________?
A. High porosity
B. Low thermal conductivity
C. Both a. and b.
D. Neither a. not b.
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Word of the Day
27 Jul
Widen
make or become wider.
چوڑا ہونا، کشادہ کرنے کا عمل

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