Workshop Technology
When more volume of acetylene and less volume of oxygen is supplied, then a ___ flame is obtained.

Neutral
None of the listed here
Oxidizing
Carburising

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Workshop Technology
During hot working of metals

All of the listed here
Mechanical properties are improved due to refinement of grains
Porosity of the metal is largely eliminated
Grain structure of the metal is refined

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Workshop Technology
In a simple die

Two or more operations are performed simultaneously at the single stroke of the ram
Two or more cutting operations are performed at one station of the press in every stroke of the ram
Both cutting and non-cutting operations are performed at one station of the press in every stroke of the ram
None of the listed here

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