Which of the following statement is wrong about ultrasonic machining?

1.	Which of the following statement is wrong about ultrasonic machining?
A.	It is best suited for machining hard and brittle materials.
B.	It cuts materials at very slow speeds
C.	It removes large amount of material
D.	It produces good surface finish
Answer» D. It produces good surface finish

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Which of the following statement is wrong about ultrasonic machining?

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