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Furnace Technology

Furnace Technology
Acid dew point temperature (ADT) of a flue gas produced by the combustion of a fuel containing 1% sulphur may be about __________ °C.

250
130
180
80

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Furnace Technology
In order to maintain an oxidising atmosphere in a furnace, it should have

More of CO in flue gas
More of excess air
Less of excess air
More of CO₂ in flue gas

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Furnace Technology
Example of an indirectly heated furnace is

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

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Furnace Technology
In low or standard frequency induction furnace, heat is produced by the

None of these
Current flow through a heating element
Induction and resistance
Combination of induced current and skin effect

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Furnace Technology
Soaking pits are meant for heating steel

Coils
Sheets
Slabs
Ingots

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Furnace Technology
Means for giving direction to the circulation of gases in furnaces are

Arrangement of heating stock in the furnaces
Fans
All of these
Location of outlet ports and heating & combustion devices

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