Furnace Technology Presence of SO₂ in furnace gases attacks the ferrous metal by way of Causing metal embrittlement All of these Attacking the grain boundaries; particularly severe on low carbon and nickel bearing steels at high temperature Accelerating the rate of scaling Causing metal embrittlement All of these Attacking the grain boundaries; particularly severe on low carbon and nickel bearing steels at high temperature Accelerating the rate of scaling ANSWER DOWNLOAD EXAMIANS APP
Furnace Technology Heat transfer rate to the charge/stock in a furnace does not depend upon the Flue gas temperature Initial temperature of the charged stock Emissivity of refractory walls Type of fuels viz solid, liquid or gaseous Flue gas temperature Initial temperature of the charged stock Emissivity of refractory walls Type of fuels viz solid, liquid or gaseous ANSWER DOWNLOAD EXAMIANS APP
Furnace Technology Thickness of stock does not affect the fuel economy of furnaces, if the material to be heated is of Low emissivity Both A and B High thermal conductivity Neither A nor B Low emissivity Both A and B High thermal conductivity Neither A nor B ANSWER DOWNLOAD EXAMIANS APP
Furnace Technology Ceramic recuperators (made of SiC) is economical, only when used for preheating combustion air above __________ °C. 650 1000 850 250 650 1000 850 250 ANSWER DOWNLOAD EXAMIANS APP
Furnace Technology Shaft furnaces are used for All of these Smelting Roasting Calcining All of these Smelting Roasting Calcining ANSWER DOWNLOAD EXAMIANS APP
Furnace Technology In reverberatory furnace, charge is heated mainly by Conduction Radiation of heat from the roof of the combustion chamber Natural convection None of these Conduction Radiation of heat from the roof of the combustion chamber Natural convection None of these ANSWER DOWNLOAD EXAMIANS APP
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