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Q. |
Frequency of tool’s oscillation in USM ranges between |
A. | 5-10 khz |
B. | 10-15 khz |
C. | 18-20 khz |
D. | 25-50 khz |
Answer» C. 18-20 khz | |
Explanation: frequency used in usm is between 18 – 20 khz. |
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