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Incoming air pressure and quantity in cupola furnace are controlled by which of the following element?

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in Casting-Forming-Welding I by (687k points)
Incoming air pressure and quantity in cupola furnace are controlled by which of the following element?

(a) Tuyeres

(b) Tapping spout

(c) Wind box

(d) Blast pipe

The question was posed to me in an interview.

Enquiry is from Furnaces for Melting topic in portion Pouring – Gating Design, Melting Furnaces, Melting and Casting Quality of Casting-Forming-Welding I

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The correct option is (c) Wind box

To explain I would say: The air enters the cupola through the tuyers. But the air blowers in the wind box controls the requisite pressure and quantity of air coming inside.

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