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Furnace Technology

Furnace Technology
Example of an indirectly heated furnace is

Muffle furnace
Neither A nor B
Both A and B
Hood annealing furnace

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Furnace Technology
In which of the following furnaces, the gases are sucked through the stock bed from below?

Beehive oven
Soaking pit
None of these
Sintering machine

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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
Type of fuels viz solid, liquid or gaseous
Emissivity of refractory walls

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Furnace Technology
Temperature of a furnace fired with low calorific value fuel gas (i.e. lean gas) can be increased by

All of these
Oxygen enrichment of combustion air
Preheating the fuel gas
Preheating the combustion air

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Furnace Technology
Protective gas used in the annealing furnace for steel coil comprises of

5% H₂ + 9% N₂
95% N₂ + 5% H₂
100% CO
100 %H₂

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Furnace Technology
Dampers are located

Anywhere after the I.D. fan
Before the I.D fan
Near the top of the chimney
After the I.D. fan

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