Manufacturing And Production Technology
Which of the following statement is correct about hot machining?

It is used for machining high strength and high temperature resistant materials.
It requires less power than machining metals at room temperature.
The rate of tool wear is lower.
All of these

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Manufacturing And Production Technology
Threading is an operation of

Cutting helical grooves on the external cylindrical surface
Smoothing and squaring the surface around a hole
Sizing and finishing a small diameter hole
Producing a hole by removing metal along the circumference of a hollow cutting tool

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