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Where is the cupola situated above tuyeres for superheating, combustion or oxidizing zone?

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in Casting-Forming-Welding II by (119k points)
Where is the cupola situated above tuyeres for superheating, combustion or oxidizing zone?

(a) 15cm to 30cm

(b) 25cm to 40cm

(c) 35cm to 50cm

(d) 45cm to 60cm

I have been asked this question during an online interview.

I need to ask this question from Zones and Efficiency of Cupola in section Metal Furnace and Practice of Casting-Forming-Welding II

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Right answer is (a) 15cm to 30cm

Easiest explanation: For superheating, combustion or oxidizing zone, the cupola is generally situated at the top, approximately 15cm to 30cm above the tuyeres.

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