Q.

What is the value of depth in Ultrasonic sinking, after which, material removal becomes difficult?

A. 1 to 2 mm
B. 2 to 5 mm
C. 5 to 7 mm
D. 7 to 10 mm
Answer» C. 5 to 7 mm
Explanation: after a depth of 5 to 7 mm, in usm sinking, material removal becomes very difficult.
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