Impact test for detection of defects in the casting is the most crude and unreliable method of non-destructive testing.(a) True(b) FalseThis question was posed to me in a job interview.My question is taken from Non Destructive Testing in division Inspection Testing in Foundries of Casting-Forming-Welding I

Impact test for detection of defects in the casting is the most crude

1.	Impact test for detection of defects in the casting is the most crude and unreliable method of non-destructive testing.(a) True(b) FalseThis question was posed to me in a job interview.My question is taken from Non Destructive Testing in division Inspection Testing in Foundries of Casting-Forming-Welding I
Answer» Right option is (a) True Easy explanation: In the impact TEST, the casting is SUBJECTED to a BLOW by the help of a hammer of known WEIGHT, which basically strikes or falls on the SURFACE of the casting. Defective castings fail due to the impact of the blow, but this method is very crude and unreliable to the material or casting which is inspected.

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