Refractory Technology Porosity is induced in insulating refractories by adding Powdered naphthalene All of these Ammonium chloride/sulphate Calcium phosphate Powdered naphthalene All of these Ammonium chloride/sulphate Calcium phosphate ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Because of its very high refractoriness of the order of __________ °C, silicon carbide refractories are used in zinc smelting furnace, muffle furnace and for supporting the wares in tunnel kilns. 2400 2200 1800 2700 2400 2200 1800 2700 ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Addition of grog in fireclay brick during its manufacture is advantageous, because it results in 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 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 ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology __________ bricks are used in the burning zone of a cement rotary kiln. Thoria Silicon carbide High alumina Fireclay Thoria Silicon carbide High alumina Fireclay ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Silica refractories are not used in Coke oven walls Dome and upper portion of B.F. stoves Beehive coke ovens Open hearth furnace roof Coke oven walls Dome and upper portion of B.F. stoves Beehive coke ovens Open hearth furnace roof ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Dry mix hydraulic compositions of refractory aggregates with suitable bonding materials are called refractory None of these Mortars Castables Cements None of these Mortars Castables Cements ANSWER DOWNLOAD EXAMIANS APP
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