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What is the thermal efficiency of a low frequency induction furnace?(a) 60%(b) 70%(c) 80%(d) 90%I had been asked this question at a job interview.The above asked question is from Induction Furnace in section Metal Furnace and Practice of Casting-Forming-Welding II

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Right choice is (c) 80%

For explanation I WOULD SAY: Any core TYPE induction surface has a HIGH amount of thermal efficiency. A low frequency induction furnace has a thermal efficiency of 80%.



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