Refractory Technology High thermal conductivity of a refractory material is not important, when it is to be used in the Recuperators Muffle furnace Blast furnace Coke oven regenarators Recuperators Muffle furnace Blast furnace Coke oven regenarators ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Which is the stable form of silica between 1470°C and the melting point 1713°C ? Tridymite None of these Cristobalite Quartz Tridymite None of these Cristobalite Quartz ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Presence of MgO in alumino-silicate refractories __________ its refractoriness. Does not affect Either A or B; depends on its quantity Increases Lowers Does not affect Either A or B; depends on its quantity Increases Lowers ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Firing of refractory brick is done to All of these Dehydrate the dried refractory Develop stable mineral forms in them Form ceramic bonds necessary for development of high crushing strength in the finished product All of these Dehydrate the dried refractory Develop stable mineral forms in them Form ceramic bonds necessary for development of high crushing strength in the finished product ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Refractory bricks with lower permeability is produced by using Higher moulding pressure Finer grog size All of these Higher firing temperature Higher moulding pressure Finer grog size All of these Higher firing temperature 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
EXAMIANS