What would the approximate amperage setting be if a welder were set to the high range(150 to350 amps) and the fine adjustment knob were pointing at 5 on a 10- points scale?

If the welder is set to the high range of 150 to 350 amps and the fine adjustment knob is positioned at 5 on a 10-point scale, you can estimate the amperage as approximately halfway between the two extremes. This would suggest an amperage around 250 amps, as 5 on the scale indicates a mid-range setting within the high range.