Refractory Technology Mcqs for Chemical


Q.  Chromite refractories are_____________________?

a. Acidic refractory
b. Neutral refractory
c. Basic refractory
d. Fired at a temperature of 600°C only


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MCQs:  With decrease in porosity, the ______________ of the refractories decreases?
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MCQs:  ______________ bricks should not be used in oxidising atmosphere?
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MCQs:  Magnesite bricks have poor resistance to attack by _____________ slag?
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MCQs:  Which is not a natural insulating material ?
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MCQs:  Which of the following is not a high alumina refractory material ?
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MCQs:  ___________________ is the measure of the strength of refractory under the combined effect of temperature & load ?
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MCQs:  Which one contains minimum percentage of SiO2 ?
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MCQs:  Pure bauxite is the best raw material for the manufacture of high alumina refractories, in which maximum alumina content can be as high as _____________ percent?
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MCQs:  Mullite is chemically represented by_________________?
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MCQs:  High alumina refractory compared to fireclay bricks have____________________?
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MCQs:  Porosity of fireclay refractories is _______________ percent?
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MCQs:  Fusion temperature of pure silica (SiO2) is _______________ °C?
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MCQs:  Bottom of basic open hearth furnace are constructed of__________________?
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MCQs:  Addition of zircon to silica refractory brick improves its_____________________?
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MCQs:  Refractories subjected to alternate cycles of heating & cooling are liable to loose their resistance to__________________?
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MCQs:  Refractory bricks with lower permeability is produced by using __________________?
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MCQs:  Pure oxide refractories are generally monocrystalline in nature and are self bonded _______________ bricks are generally used as moderator in nuclear reactors?
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MCQs:  Ceramic recuperators used for waste heat recovery from high temperature flue gas going out of the furnace is made of________________?
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MCQs:  Refractory bricks having lower porosity have_________________________?
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MCQs:  Silica bricks are never used for lining the____________________?
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