CompTIA Network+ Practice Test

Which type of UPS is designed to run continuously from battery power?

1. Offline/Standby UPS

2. Line-interactive UPS

3. On-line/Double-conversion UPS

4. Emergency backup UPS

The correct answer is: On-line/Double-conversion UPS

The chosen answer, the On-line/Double-conversion UPS, is the correct option because this type of uninterruptible power supply (UPS) is designed to provide continuous power to connected equipment by converting incoming AC power to DC and then back to AC. This process allows the UPS to simultaneously charge its batteries while supplying power to connected devices. In the event of a power outage or if the incoming power quality is poor, it can seamlessly switch to battery power without any interruption, ensuring that there is no downtime for critical systems. On-line UPS systems are particularly valuable in environments where power quality is crucial, as they provide additional benefits like filtering out power surges, spikes, and sags, ensuring consistent delivery of clean, reliable power. This makes them ideal for sensitive equipment that cannot tolerate any power interruptions. Other types of UPS, while useful in various applications, do not operate continuously on battery power. For instance, the Offline/Standby UPS relies on the mains power for its output during normal operation and only switches to battery during an outage, which may introduce a brief delay. The Line-interactive UPS offers some correction for minor fluctuations in voltage but still primarily relies on the mains. The Emergency backup UPS is a more generic term that could refer