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On what voltage do the X-rays operate?

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in Casting-Forming-Welding II by (119k points)
On what voltage do the X-rays operate?

(a) 350 kV

(b) 375 kV

(c) 400 kV

(d) 475 kV

The question was posed to me in an interview.

This interesting question is from Radiography in division Non Destructive Techniques of Casting-Forming-Welding II

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Correct option is (c) 400 kV

The best explanation: The X-ray are waves are having very short wavelength. The object which has to be tested is exposed to the X-rays, for doing this, high voltage supply is required. The X-rays ideally operate on 400 kV.

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