Manufacturing And Production Technology
A type of welding flows, which is the result of a perfect proportion and mixture of acetylene and oxygen and is used for fusion welding of steel and cast iron, is

Neutral flame
Oxidizing flame
Oxy-acetylene flame
Carburizing flame

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

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

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