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What is the maximum transformer power supply needed by the direct arc furnace?

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in Casting-Forming-Welding II by (119k points)
What is the maximum transformer power supply needed by the direct arc furnace?

(a) 35,000 kVA

(b) 40,000 kVA

(c) 45,000 kVA

(d) 50,000 kVA

I had been asked this question in homework.

The origin of the question is Direct Arc Furnace in section Metal Furnace and Practice of Casting-Forming-Welding II

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The correct choice is (b) 40,000 kVA

To elaborate: None.

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