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Furnace Technology

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

< 8
< 5
< 2
< 10

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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

Ostwald chart
Cox chart
Sankey diagram
None of these

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Furnace Technology
Temperature of a furnace fired with low calorific value fuel gas (i.e. lean gas) can be increased by

All of these
Preheating the combustion air
Oxygen enrichment of combustion air
Preheating the fuel gas

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

CO
All of these
H₂
High CO/CO₂

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Furnace Technology
Reducing atmosphere is maintained in a

Calcination kiln
Blast furnace
L.D. converter
Soaking pit

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Furnace Technology
The thermal efficiency of an air/fuel gas preheating recuperator may be as high as __________ percent.

50
99
85
65

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