92. A steel member used in the furnace construction to take the thrust of the brickwork is called
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93. Silica refractories are not used in
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94. Thermal diffusivity of a refractory brick is high, when its __________ is high.
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95. Which property is important for bricks used in the combustion chamber & dome of blast furnace stoves?
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96. Refractoriness/fusion points of 'superduty' refractories is __________ °C.
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97. Mullite is chemically represented by
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98. Addition of grog in fireclay brick during its manufacture is advantageous, because it results in
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