Which of the following is a true statement about inverter welding machines? They reduce the AC frequency to below:10 Hz They require more energy than transformer-rectifier machines. __ They deliver a very smooth and steady AC welding arc. __ They deliver a very smooth and steady DC welding arc.

## Step 1<br />Inverter welding machines are known for their ability to deliver a very smooth and steady DC welding arc. This is due to their advanced technology that allows them to convert AC power to DC power with minimal energy loss.<br /><br />## Step 2<br />The other options are not accurate descriptions of inverter welding machines. They do not reduce the AC frequency to below 10 Hz, nor do they require more energy than transformer-rectifier machines.<br /><br />## Step 3<br />Inverter welding machines are also not known for delivering a smooth and steady AC welding arc. They are specifically designed to deliver a DC welding arc, which is more stable and efficient.