The flame used in cutting and welding of metals is _________ (oxy-hydrogen flame/hydro-oxy flame)

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Solution

The oxy-hydrogen flame consists of oxygen and hydrogen that burns at a very high temperature.
It is also known as an oxy-hydrogen torch.
It is also used for the cutting and welding of glass and thermoplastics.
Hence, the flame used in the cutting and welding of metals is oxy-hydrogen flame.

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