M

Mr. Dubey • 52.30K Points
Coach 

Q. Typical frequencies which might be used to perform ultrasonic testing of ferrous and non-ferrous welds are:

(A) 25 to 100 kHz
(B) 200 to 5 MHz
(C) 1 MHz to 5 MHz
(D) 2.25 MHz to 10 MHz
Correct : Option (C)

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