Hamad Refractory Technology 31/05/2021 A. Cost B. Electrical conductivity C. Thermal conductivity D. Fusion point Related Mcqs: Lessing ring is formed by the addition of a partition across the centre of a raschig ring, which results in an area increase of about ______________ percent?A. 5 B. 20 C. 35 D. 55... Grog addition in fireclay during brick manufacture is done to_________________?A. Reduce its shrinkage on heating B. Impart greater spalling resistance C. Enhance the strength of fired refractories D. All A., B. and C.... Electrical resistor bars are made of _______________?A. Silicon carbide B. Alumina C. Zirconia D. Graphite... Dry mix hydraulic compositions of refractory aggregates with suitable bonding materials are called refractory_________________?A. Mortars B. Cements C. Castables D. None of these... The highest melting pure oxide (m.p. > 3000°C)is___________________?A. Thoria B. Alumina C. Beryllia D. Zirconia...
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