Question

In an induction furnace, mixing and melting rates are altered by?

(a) Controlling the temperature ranges only

(b) Controlling the number of electrodes used only

(c) Controlling power and frequency of current only

(d) All of the mentioned factors

This question was addressed to me in unit test.

I would like to ask this question from Furnaces for Melting in division Pouring – Gating Design, Melting Furnaces, Melting and Casting Quality of Casting-Forming-Welding I

Answer 1

Correct answer is (c) Controlling power and frequency of current only

Best explanation: Due to the principle of induction used, the electromagnetic fields are produced. These EMF’s are used to stir the metal. Hence, controlling the power and frequency, Mixing and melting rates can be altered.