Furnace Technology
Which of the following is a natural draft furnace?

Blast furnace stoves
Sintering furnace
None of these
Power plant boilers

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Furnace Technology
Which is not accomplished in an underfired furnace?

Reduction in the temperature of furnace gases
Elimination of cold spot at the bottom of the charge
Portection of the periphery of the charge from excessive radiation
Increase in heating capacity/m² of floor space

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