Furnace Technology Presence of SO₂ in furnace gases attacks the ferrous metal by way of 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 Causing metal embrittlement All of these ANSWER DOWNLOAD EXAMIANS APP
Furnace Technology Ceramic recuperators (made of SiC) is economical, only when used for preheating combustion air above __________ °C. 850 650 250 1000 850 650 250 1000 ANSWER DOWNLOAD EXAMIANS APP
Furnace Technology Maximum heat transfer in high temperature furnaces is by Conduction Convection Either A, B or C; depends on the type of furnace Radiation Conduction Convection Either A, B or C; depends on the type of furnace Radiation ANSWER DOWNLOAD EXAMIANS APP
Furnace Technology Size of the combustion chamber of a furnace depends upon the Method of mixing the fuel & air All of these Preheat temperature of fuel & air Heat release rate of the fuel Method of mixing the fuel & air All of these Preheat temperature of fuel & air Heat release rate of the fuel ANSWER DOWNLOAD EXAMIANS APP
Furnace Technology Calcination of limestone to produce lime is done in a __________ kiln. Tunnel Vertical shaft Rotary Both B and C Tunnel Vertical shaft Rotary Both B and C ANSWER DOWNLOAD EXAMIANS APP
Furnace Technology Ingress of cold air in the furnaces through cracks, charging doors, openings etc. Reduces the flue gas temperature and makes the furnace atmosphere oxidising Reduces the furnace draught Increases the load on the induced draft fan All of these Reduces the flue gas temperature and makes the furnace atmosphere oxidising Reduces the furnace draught Increases the load on the induced draft fan All of these ANSWER DOWNLOAD EXAMIANS APP
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