Refractory Technology Hot face insulating linings of high purity alumina fused mullite are used, where Very high temperatures are involved All of these Highly reducing conditions are involved Presence of iron or silica is harmful Very high temperatures are involved All of these Highly reducing conditions are involved Presence of iron or silica is harmful ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Spalling of a refractory means its Fracture due to uneven expansion at high temperature Softening Resistance to chemical action of gases and molten fluxes Resistancce to compressive loads Fracture due to uneven expansion at high temperature Softening Resistance to chemical action of gases and molten fluxes Resistancce to compressive loads ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Except __________ , all other refractories are bad conductors of electricity (i.e, have low electrical conductivity). Carborundum Fireclay Chromite Graphite Carborundum Fireclay Chromite Graphite ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Maximum water percentage in refractory mix meant for hand moulding may be as high as __________ percent. 7-12 2-3 5-7 14-20 7-12 2-3 5-7 14-20 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. 770 570 270 70 770 570 270 70 ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Bottom of basic open hearth furnace are constructed of Porous fireclay bricks Dead burnt magnesite ramming mass Semi-silica bricks Silicon carbide bricks Porous fireclay bricks Dead burnt magnesite ramming mass Semi-silica bricks Silicon carbide bricks ANSWER DOWNLOAD EXAMIANS APP
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