Q.

How much is the value of surface finished, achieved using Ultrasonic Polishing?

A. 0.1 μm
B. 0.3 μm
C. 0.5 μm
D. 0.7 μm
Answer» B. 0.3 μm
Explanation: using ultrasonic polishing, very low values of surface finish can be obtained, which may be very low as 0.3 μm.
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