Refractory Technology 'Super refractories' are made from pure Nitrides Carbides Borides Oxides Nitrides Carbides Borides Oxides ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Spalling of silica bricks occurs due to abrupt volume changes, when it is cooled below a temperature of __________ °C. 770 70 570 270 770 70 570 270 ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Spalling resistance of a refractory can not be increased by Decreasing its thermal co-efficient of expansion Increasing its porosity Making it denser Using a coarser grog during its manufacture Decreasing its thermal co-efficient of expansion Increasing its porosity Making it denser Using a coarser grog during its manufacture ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Crushing strength of a refractory Is unaffected with change in service temperature Increases with rise in service temperature Decreases with rise in service temperature Decreases with increase in porosity Is unaffected with change in service temperature Increases with rise in service temperature Decreases with rise in service temperature Decreases with increase in porosity ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Cold crushing strength of a refractory does not depend upon its Shape Firing temperature Texture Composition Shape Firing temperature Texture Composition ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Porosity of silica bricks varies from __________ percent. 20 to 30 5 to 10 45 to 60 60 to 75 20 to 30 5 to 10 45 to 60 60 to 75 ANSWER DOWNLOAD EXAMIANS APP
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