Refractory Technology Mcqs for Chemical

Q.  Graphite or carbon refractories______________________?

a. Exhibit wetting characteristics
b. Should be used in neutral or reducing atmosphere
c. Exhibit high shrinkage on thermal treatment
d. Are not resistant to corrosion by slag


ANSWER: See Answer
 
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Category: Chemical Engineering Mcqs,   Published by: T-Code Scripts
MCQs:  _____________ nozzles are used in continuous casting of steel?
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MCQs:  Which is the stable form of silica upto 1470°C ?
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MCQs:  Thermal spalling mainly occurs during _____________ of furnaces?
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MCQs:  High alumina refractories are used in the ___________________?
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MCQs:  _____________ is not a single oxide-refractory?
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MCQs:  Chrome magnesite brick is not used for lining the___________________?
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MCQs:  Most Cermets, which normally have high thermal conductivity and high thermal shock resistance, comprises of ceramic & metallic components of ______________ percent respectively?
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MCQs:  ____________ of carbon blocks in the hearth of blast furnace helps in avoiding skull formation, when it becomes cold?
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MCQs:  Rotary kilns meant for calcination of limestone are lined with chrome magnesite in ______________ zone?
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MCQs:  Semi-silica bricks compared to silica bricks have_______________?
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MCQs:  Which of the following impurities reduces the refractoriness of magnesite bricks ?
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MCQs:  SiO2 percentage in firebrick is about____________________?
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MCQs:  ‘Spinel’, a refractory mineral is chemically represented as____________________?
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MCQs:  With increase in the density of silica refractories, its_______________?
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MCQs:  Mixing of ground refractory material and water is done in a ______________ mill?
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MCQs:  Silicon carbide refractories are used in the _____________?
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