Chemical Engineering MCQs

6108 MCQs  (Page 344 of 611)

Attempt Chemical Engineering Quiz
______________ bricks are used in the burning zone of a cement rotary kiln ?
A. High alumina
B. Fireclay
C. Thoria
D. Silicon carbide
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Maximum water percentage in refractory mix meant for hand moulding may be as high as _____________ percent?
A. 2-3
B. 5-7
C. 7-12
D. 14-20
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Which of the following has the lowest electrical resistivity ?
A. Graphite
B. Fireclay
C. Alumina
D. Zircon
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Refractory castables are used for__________________?
A. Producing monolithic linings
B. Patch work
C. Minimising the number of joints in the structure
D. All a., b. and c.
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Silicon carbide refractories have very low ___________________?
A. Refractoriness (< 1700°c)
B. Thermal conductivity
C. Resistance to thermal shock
D. None of these
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Carbon refractories are exclusively used in the_________________?
A. Hearth of blast furnace
B. Walls of coke oven
C. Regenerators of coke oven
D. Side wall of soaking pits
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Because of its very high refractoriness of the order of __________ °C, silicon carbide refractories are used in zinc smelting furnace, muffle furnace and for supporting the wares in tunnel kilns ?
A. 1800
B. 2200
C. 2400
D. 2700
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Which is the most stable crystalline form of silica at room temperature ?
A. Quartz
B. Cristobalite
C. Tridymite
D. None of these
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Which of the following bricks has the most close values of RUL and PCE ?
A. Silica bricks
B. Fireclay bricks
C. High alumina bricks
D. Tar dolomite bricks
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Roof of a basic open hearth furnace is lined with ______________ bricks?
A. Silica
B. Fireclay
C. Dolomite
D. Magnesite
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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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