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Furnace Technology

Furnace Technology
In salt bath furnace, heat is transferred to the charge mainly by

Radiation
Convection
None of these
Conduction

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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
The purpose of controlling the furnace atmosphere is to prevent surface attack by

Either of the above
Decarburising
Oxidation/scaling
Sulphur penetration

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Furnace Technology
Advantages of use of preheated combustion air are

Reduction in scale losses
All of these
Saving in fuel consumption
Increase in flame temperature

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Furnace Technology
Oxygen percentage in the flue gas coming out of a gaseous fuel fired furnace should be ideally about __________ percent.

< 8
< 10
< 2
< 5

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Furnace Technology
Scaling of furnace stock is reduced by __________ in flue gas.

All of these
High CO/CO₂
H₂
CO

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