Ace the Tracks: Amtrak Signal Maintenance 2026 Level 1 – All Aboard for Success!

The important idea is reading the transformer's nameplate to know what it can safely supply. For this UT transformer, the secondary voltage is 18 volts, and the maximum current the secondary winding can deliver is 11 amps. This means the transformer can power loads up to 11 A while keeping the output around 18 V; if you draw less, the voltage stays near 18 V, and drawing more than 11 A risks overheating or voltage drop. The other options would either state a different voltage or a current value that exceeds what the winding is rated to handle. So the 18 V at 11 A pairing is the one that matches the unit’s rated capability.