Question

of the below possible choices, if an engine - driven welding machine must provide 120vac power to operate tools, it must do what? operate at idle speed only operate at its welding speed not be used for welding at the same time cut the current available for welding in half

Explanation:

Engine - driven welding machines have limited power resources. To provide 120VAC power for operating tools, the power that could be used for welding needs to be diverted. Using it for welding simultaneously would likely not leave enough power for the 120VAC tools.

Answer:

C. not be used for welding at the same time