_________________ furnace is generally used in the non-ferrous foundries ?
Correct answer: D. Indirect arc
- A. Direct arc
- B. Induction
- C. Resistance
- D. Indirect arc
Explanation
Indirect-arc furnaces are commonly used for non-ferrous metals because the arc heats the charge indirectly and reduces contamination from the electrodes. Direct-arc furnaces are more commonly associated with ferrous melting.
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