111. The largest consumer of refractories is the __________ industry.
112. Refractoriness under load (RUL) of fireclay bricks (under a load of 2 kg/cm2) is __________ °C.
113. Which is the most stable crystalline form of silica at room temperature?
114. Fireclay refractories
115. Fireclay refractories have
116. 'Super refractories' are made from pure
117. Pyrometric cone equivalent (PCE) of a refractory is the measure of its
118. Grog addition in fireclay during brick manufacture is done to
119. The maximum linear expansion of silica bricks during firing is about __________ percent.
120. The highest melting pure oxide (m.p. > 3000°C) is
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