Final answer:
To adjust an oxyacetylene cutting torch, the oxygen valve should be 2 to 3 turns open.
Step-by-step explanation:
When adjusting an oxyacetylene cutting torch, the oxygen valve at the base of the handle should be 2 to 3 turns open. This allows the proper amount of oxygen to mix with the acetylene gas, creating the necessary combustion for cutting. Opening the valve too much or too little can affect the quality and effectiveness of the torch's flame.
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