Which of the following can occur if the maximum rated load is exceeded on an uninterruptible power supply (UPS)?

While overloading electrical equipment can be a fire hazard, a UPS typically has overload protection that would shut it down rather than risk a fire solely from exceeding its rated load during an outage.

A UPS typically attempts to power all connected systems up to its maximum capacity; it does not selectively power off the 'last' system plugged in first.

A UPS draws power from the circuit to charge its batteries and pass power through to devices; it does not 'compensate' for an overload by drawing more power from the circuit in a way that directly addresses the overload itself.

If the total power draw of connected devices exceeds the UPS's rated capacity, its battery will deplete much faster than its advertised runtime when the primary power fails. This accelerated depletion means the UPS will be unable to provide power for the expected duration, leading to insufficient runtime to gracefully shut down or bridge a power interruption.