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In penetrant testing of NDT, a liquid is penetrated into the cracks of metal by the application of pressure.

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in Casting-Forming-Welding I by (687k points)
In penetrant testing of NDT, a liquid is penetrated into the cracks of metal by the application of pressure.

(a) True

(b) False

I have been asked this question by my school principal while I was bunking the class.

Asked question is from Non Destructive Testing in portion Inspection Testing in Foundries of Casting-Forming-Welding I

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Right choice is (b) False

Explanation: Penetrant testing method is generally used for detecting very small surface cracks and it has an advantage over the magnetic particle method that it can be used for any material. A penetrant liquid is used which is drawn into the cracks or voids by means of capillary action. In this method, there is no requirement of pressure.

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