[Solved] Possible degradation of penetrant materials performance is often checked by:

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Q.	Possible degradation of penetrant materials performance is often checked by:
A.	Performing penetrant testing of comparator blocks using samples of new and used penetrant materials
B.	Water tolerance test
C.	Using a penetrant test penetrameter
D.	Judgment of a qualified inspector during production testing
Answer» A. Performing penetrant testing of comparator blocks using samples of new and used penetrant materials

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