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When an AC current is used for magnaflux test, what is its frequency?

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in Casting-Forming-Welding II by (119k points)
When an AC current is used for magnaflux test, what is its frequency?

(a) 35 cycles/sec

(b) 45 cycles/sec

(c) 55 cycles/sec

(d) 65 cycles/sec

I have been asked this question in class test.

Origin of the question is Magnaflux Test topic in chapter Non Destructive Techniques of Casting-Forming-Welding II

1 Answer

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Best answer
The correct option is (c) 55 cycles/sec

The best explanation: A magnaflux test is the one which is used for testing and detecting for any kind of thermal defect or any kind of quenching crack. For doing this, an alternating current can be used. The frequency of the alternating current is in the range of 50 to 60 cycles every second.

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