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What is the efficiency of an A.C. welding transformer?

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in Casting-Forming-Welding II by (119k points)
What is the efficiency of an A.C. welding transformer?

(a) 0.6

(b) 0.7

(c) 0.8

(d) 0.9

I had been asked this question during a job interview.

I'm obligated to ask this question of Arc Welding Equipment topic in division Welding and Related Processes of Casting-Forming-Welding II

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Best answer
Right answer is (c) 0.8

Explanation: A.C welding is currently gaining considerable ground. The efficiency of an alternating current welding transformer varies from 0.8 to 0.85 and the efficiency of A.C. outfits is in the range of 0.3 to 0.6.

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