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Free APC DU0-001 Exam Braindumps (page: 12)

Page 12 of 82
PDF with 325 Questions

What is the main function of a UPS?

  1. To provide battery back-up power to IT equipment
  2. To regulate the voltage of power going to the racks
  3. To distribute power from the transformer to the racks
  4. To supply diesel-generated power when the utility is out

Answer(s): A



What is a function of a transformer in a line interactive UPS?

  1. To increase the power factor as the load increases
  2. To increase harmonics by stepping down the output
  3. To regulate output voltage as the input voltage varies
  4. To provide low impedance for switched mode power supplies

Answer(s): C



Which component of a line interactive UPS increases its battery life?

  1. Dual mains input
  2. Voltage regulating transformer
  3. Low impedance DC disconnect
  4. High impedance battery charge circuit

Answer(s): B



How long is the transfer to battery time for a double conversion online UPS?

  1. 0 ms (0 cycles)
  2. 8 ms (0.5 cycles)
  3. 16 ms (1 cycle)
  4. 500 ms (30 cycles)

Answer(s): A



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