Manufacturing And Production Technology
Which of the following statement is wrong about ultrasonic machining?

It removes large amount of material
It cuts materials at very slow speeds
It produces good surface finish
It is best suited for machining hard and brittle materials.

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Manufacturing And Production Technology
Glazing in grinding wheels can be decreased by

Using a harder wheel or by increasing the wheel speed
Using a softer wheel or by increasing the wheel speed
Using a harder wheel or by decreasing the wheel speed
Using a softer wheel or by decreasing the wheel speed

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