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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.

< 2
< 5
< 8
< 10

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Furnace Technology
The function of an economiser in a boiler is to preheat the

Combustion air
Furnace oil
Pulverised coal
Feedwater

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Furnace Technology
Which of the following is a rotary furnace?

Annealing furnace
Lime kiln
Soaking pit
Stoves

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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
Combustion of fuel in a furnace with oxygen enriched air results in higher

Flame temperature
Stack loss
Flue gas volume
Fuel consumption

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Furnace Technology
Regenerators as compared to recuperators for the same duty

All of these
Are lighter & compact
Store smaller quantity of waste heat
Involve higher initial cost

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