

MCQOPTIONS
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1. |
Most commercial ultrasonic testing is accomplished using frequencies between: |
A. | 1 and 25 kHz |
B. | 0.2 and 25 MHz |
C. | 1 and 1 000 kHz |
D. | 15 and 100 MHz |
Answer» C. 1 and 1 000 kHz | |