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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MCQs: Firing temperature of magnesite bricks is about _____________ °C?
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MCQs: Which of the following is not an acidic refractory?
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MCQs: Grog__________________?
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MCQs: Except _____________, all other refractories are bad conductors of electricity (i.e, have low electrical conductivity)?
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MCQs: Refractoriness of a typical silica brick corresponds to Segar cone number, ’32’, which is equivalent to a temperature of _____________ °C?
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MCQs: With increase in the alumina content in firebricks, its fusion point (refractoriness) ?
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MCQs: Insulating refractories should have_______________?
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MCQs: Which is the stable form of silica below 870°C ?
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MCQs: Which of the following is not a neutral refractory ?
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MCQs: Firing temperature is minimum (1250-1400 °C) for _______________ bricks?
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MCQs: Electrical resistor bars are made of _______________?
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MCQs: Refractories are dried in the _______________?
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MCQs: Which refractory must have controlled atmosphere (temperature and humidity) for its safe storage ?
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MCQs: An indication of degree of firing in silica brick is its____________________?
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