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Furnace Technology

Furnace Technology
Shaft furnaces are used for

All of these
Roasting
Calcining
Smelting

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Furnace Technology
The thermal efficiency of a steel slab reheating furnace (walking beam type) may be about __________ percent.

40
15
85
70

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Furnace Technology
Neutral atmosphere is maintained in a/an __________ furnace.

Cold rolled steel coil annealing
Walking beam reheating
Soaking pit
Open hearth

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Furnace Technology
Regenerators compared to the recuperators for the same duty

All of these
Are less costly
Are of smaller size
Occupy more space

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

< 5
< 2
< 10
< 8

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Furnace Technology
An electric furnace producing heat by means of an electric arc struck between each of three electrodes and the charge is called __________ furnace.

Arc
Low frequency induction
None of these
Resistance

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