Chemical Engineering MCQs

6108 MCQs  (Page 360 of 611)

Attempt Chemical Engineering Quiz
The largest consumer of refractories is the _______________ industry?
A. Cement
B. Metallurgical
C. Fertiliser
D. Power
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Crushing strength of a refractory____________________?
A. Increases with rise in service temperature
B. Decreases with rise in service temperature
C. Is unaffected with change in service temperature
D. Decreases with increase in porosity
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Colour of fireclay bricks is_________________?
A. Light buff to reddish buff
B. Yellow
C. Black
D. None of these
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Slide gates in teeming laddie used for steel pouring in ingot moulds is lined with _____________ bricks?
A. Bakelite impregnated or fused periclase
B. Silica
C. Semi-silica
D. Fireclay
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Highest melting (m.p = 3070°C) oxide refractory is__________________?
A. Alumina
B. Thoria
C. Zirconia
D. Magnesia
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Dilatometer is used for the determination of ______________ of refractories?
A. Modulus of rupture
B. Permanent linear change
C. Resistance to co attack
D. Rul
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Refractoriness under loads (RUL) is quite close to the fusion temperature (PCE) for _____________ bricks?
A. Fireclay
B. Silica
C. Dolomite
D. Very low alumina
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The maximum linear expansion of silica bricks during firing is about ______________ percent?
A. 0.5
B. 1
C. 2
D. 3.5
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Hot blast main (carrying air at 1000°C) in blast furnace are lined with ______________ bricks?
A. Silica
B. Fireclay
C. Magnesite
D. Zirconia
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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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Word of the Day
27 Jul
Widen
make or become wider.
چوڑا ہونا، کشادہ کرنے کا عمل

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