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Furnace Technology

Furnace Technology
Shaft furnaces are used for

Calcining
All of these
Roasting
Smelting

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Furnace Technology
The advantages of firing pulverised coal in the furnace lies in the fact that, it

Accelerates the burning rate and economises on fuel consumption
Permits the use of high ash content coal
Permits the use of low fusion point ash coal
All of these

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Furnace Technology
Which of the following advantages is not associated with the use of preheated air for combustion of a fuel in the furnace?

Increase in calorific value of the fuel
Saving in fuel consumption
Increase in flame temperature
Reduction in scale losses

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Furnace Technology
Which is not a hearth furnace?

Cupola
Glass tank furnace
Reheating furnace
Open hearth furnace

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Furnace Technology
Flue gas outlet temperature from the chimney of any furnace should be ideally about __________ °C.

100
150
250
50

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Furnace Technology
Ceramic coating material for furnace refractory, which increases its emissivity and thus the radiation heat transfer rate in the furnace, comprises of

Graphite powder
Zircon powder
Thoria
Beryllium

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