For those not familiar with it, it is an aptitude test that covers a wide range of topics. The results can be informational. Beware if you score well enough to fill a job in the army that is really understaffed, you will never get the recruiters to stop calling.
These machines are typically wired to electrical directly. I would expect they are powered using 480 VAC. Google states they typically use about 14kw in standby mode and up to 80 kw for a scan.