In penetrant testing of NDT, a liquid is penetrated into the cracks of metal by the application of pressure.(a) True(b) FalseI 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

In penetrant testing of NDT, a liquid is penetrated into the cracks of

1.	In penetrant testing of NDT, a liquid is penetrated into the cracks of metal by the application of pressure.(a) True(b) FalseI 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
Answer» 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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