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Furnace Technology

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

All of these
High CO/CO₂
H₂
CO

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Furnace Technology
Tunnel kilns are usually used for

Drying/tempering of refractories
Roasting of pyrites
Melting of glass
Reheating of slabs

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Furnace Technology
To reduce the stack loss, heat recovery from flue gas can be done by

Preheating of cold stock
Preheating of combustion air
All of these
Steam generation in waste heat boilers

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Furnace Technology
Main gas valve in a gaseous fuel burner is a __________ valve.

Globe
Gate
Butterfly
None of these

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Furnace Technology
In a heating process, a heat flow diagram in which the quantities of heat in the various items of a heat balance are represented by the width of a band is called the

Cox chart
Ostwald chart
None of these
Sankey diagram

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Furnace Technology
In case of pulverised coal fired steam boiler, the secondary air serves the main purpose of

Drying of coal
Preheating the primary air
Transportation of coal
Combustion of coal by supplying it around the burner

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