Refractory Technology Presence of MgO in alumino-silicate refractories __________ its refractoriness. Increases Either A or B; depends on its quantity Lowers Does not affect Increases Either A or B; depends on its quantity Lowers Does not affect ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Silica bricks have low spalling resistance below 600°C, due to its High thermal diffusivity High co-efficient of expansion upto this temperature Low refractoriness Very high thermal conductivity High thermal diffusivity High co-efficient of expansion upto this temperature Low refractoriness Very high thermal conductivity ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Rotary kilns meant for calcination of limestone are lined with chrome magnesite in __________ zone. All of these Cooling Burning Preheating All of these Cooling Burning Preheating ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Zirconia refractory Does not react with basic slags Has poor electrical conductivity at high temperature Is produced from baddeleyite Can not be used as an insulator Does not react with basic slags Has poor electrical conductivity at high temperature Is produced from baddeleyite Can not be used as an insulator ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Cold crushing strength of refractories depends upon its Texture Composition All of these Firing temperature Texture Composition All of these Firing temperature ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Which refractory must have controlled atmosphere (temperature and humidity) for its safe storage? Tar bonded dolomite bricks Mullite bricks Magnesite bricks Fireclay bricks Tar bonded dolomite bricks Mullite bricks Magnesite bricks Fireclay bricks ANSWER DOWNLOAD EXAMIANS APP
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