Refractory Technology Silica refractories Crack when subjected to sudden change of temperature Have lower thermal conductivity than fireclay bricks Can not be used in the dome of hot blast stoves All of these Crack when subjected to sudden change of temperature Have lower thermal conductivity than fireclay bricks Can not be used in the dome of hot blast stoves All of these ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Zircon refractories have All of these Low co-efficient of expansion High RUL (1600°C) and refractoriness (> 2000°C) High spalling resistance All of these Low co-efficient of expansion High RUL (1600°C) and refractoriness (> 2000°C) High spalling resistance ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology High porosity refractory bricks have Poor heat conductivity & low strength All of these Poor resistance to the peneration of molten slag, metal & flue gases Better thermal spalling resistance Poor heat conductivity & low strength All of these Poor resistance to the peneration of molten slag, metal & flue gases Better thermal spalling resistance ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Colour of fireclay bricks is Light buff to reddish buff Yellow Black None of these Light buff to reddish buff Yellow Black None of these ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Magnesite chrome bricks are used in the Soaking pits Roof lining of basic open hearth & other basic furnaces Reheating furnaces All of these Soaking pits Roof lining of basic open hearth & other basic furnaces Reheating furnaces All of these ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology PCE value (Segar cone) of superduty refractories is more than 33, which is equivalent to a temperature of __________ °C. 1730 1670 1520 1630 1730 1670 1520 1630 ANSWER DOWNLOAD EXAMIANS APP
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