Free APC DU0-001 Exam Questions

In three-phase power, by how many degrees are the three basic power waveforms offset?

  1. 60
  2. 90
  3. 120
  4. 180

Answer(s): C



What is the function of a circuit breaker?

  1. To distribute power from the UPS to critical loads
  2. To filter harmonics caused by non-power factor corrected computer loads
  3. To protect electrical equipment from damage caused by overload or short circuit
  4. To balance the loads in the data center to prevent stray currents on the ground wire

Answer(s): C



Which UPS topology switches to batteries and turns on the inverter when the utility fails?

  1. Rotary
  2. Standby
  3. Delta conversion
  4. Double conversion

Answer(s): B



Which two UPS topologies are used for UPS systems that supply at least 50 kW? (Choose two.)

  1. Standby
  2. Standby - ferro
  3. Delta conversion online
  4. Double conversion online

Answer(s): C,D



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