Refractory Technology Cermets are Composite material containing both ceramic & metallic constituents Having high strength & resistance to high temperature All of these Used in space vehicles, missiles & nuclear energy plants Composite material containing both ceramic & metallic constituents Having high strength & resistance to high temperature All of these Used in space vehicles, missiles & nuclear energy plants ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology __________ of carbon blocks in the hearth of blast furnace helps in avoiding skull formation, when it becomes cold. Low porosity Non-wetting characteristics High thermal conductivity High density Low porosity Non-wetting characteristics High thermal conductivity High density ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Rate of slag attack on refractories increases with rise in temperature due to the Decreased viscosity of slag Oxidising condition in the furnace None of these Increased thermal conductivity of brick Decreased viscosity of slag Oxidising condition in the furnace None of these Increased thermal conductivity of brick ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Dry mix hydraulic compositions of refractory aggregates with suitable bonding materials are called refractory Mortars Cements None of these Castables Mortars Cements None of these Castables ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Carbon refractories Have extremely low thermal & electrical conductivities Are not attacked by slags, as they are not wetted by melts Do not burn/oxidise, when exposed to air on heating Do not resist temperature fluctuations Have extremely low thermal & electrical conductivities Are not attacked by slags, as they are not wetted by melts Do not burn/oxidise, when exposed to air on heating Do not resist temperature fluctuations ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Bottom of basic open hearth furnace are constructed of Silicon carbide bricks 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 ANSWER DOWNLOAD EXAMIANS APP
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