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Magnetic particles with fluorescent coating are seen under which light?(a) White light(b) Infrared light(c) Black light(d) Ultraviolet lightI got this question during a job interview.My question is based upon Magnaflux Test in chapter Non Destructive Techniques of Casting-Forming-Welding II

Answer»

The CORRECT answer is (d) Ultraviolet light

The explanation is: In magnetic particle testing, only ferrous materials can be tested using a magnetic particle test. The casting which is UNDERGOING magnetic inspection, if it is coated with FLUORESCENCE, then it has to be VIEWED in an ultraviolet light only.



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