Typical frequencies which might be used to perform ultrasonic testing – McqOptions

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1.	Typical frequencies which might be used to perform ultrasonic testing of concrete are:
A.	25 to 100 kHz
B.	200 to 5 MHz
C.	1 MHz to 5 MHz
D.	2.25 MHz to 10 MHz
Answer» B. 200 to 5 MHz

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