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Furnace Technology

Furnace Technology
Protective gas used in the annealing furnace for steel coil comprises of

100 %H₂
95% N₂ + 5% H₂
5% H₂ + 9% N₂
100% CO

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Furnace Technology
Ceramic recuperators (made of SiC) is economical, only when used for preheating combustion air above __________ °C.

250
850
1000
650

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Furnace Technology
An example of shaft furnace is the

L.D. converter
Glass melting tank
Soaking pit
Blast furnace

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

Gate
Butterfly
None of these
Globe

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Furnace Technology
Which of the following is a directly fired intermittant furnace?

Tower furnace
Walking beam reheating furnace
Tunnel kiln
Reverberatory furnace

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Furnace Technology
Which of the following is a rotary furnace?

Stoves
Soaking pit
Annealing furnace
Lime kiln

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