Refractory Technology Thermal diffusivity of a refractory brick is high, when its __________ is high. Density Thermal conductivity None of these Specific heat Density Thermal conductivity None of these Specific heat ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Which is not a basic refractory? Chrome magnesite Magnesite Silicon carbide Dolomite Chrome magnesite Magnesite Silicon carbide Dolomite ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Refractoriness under load (RUL) of fireclay bricks (under a load of 2 kg/cm² ) is __________ °C. 500 1000 >2000 >1350 500 1000 >2000 >1350 ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Addition of grog in fireclay brick during its manufacture is advantageous, because it results in Less addition of water to get a workable plasticity & lesser time required for drying the raw refractories and hence increased rate of production High strength & thermal spalling resistance All of these Less shrinkage in heating, decreased apparent porosity & increased specific gravity Less addition of water to get a workable plasticity & lesser time required for drying the raw refractories and hence increased rate of production High strength & thermal spalling resistance All of these Less shrinkage in heating, decreased apparent porosity & increased specific gravity ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Si percentage in silica refractories used in the walls of coke oven is about 60 80 95 45 60 80 95 45 ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Dilatometer is used for the determination of __________ of refractories. Resistance to CO attack Permanent linear change Modulus of rupture RUL Resistance to CO attack Permanent linear change Modulus of rupture RUL ANSWER DOWNLOAD EXAMIANS APP
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