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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