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Free APC DU0-001 Exam Braindumps (page: 15)

Page 15 of 82
PDF with 325 Questions

Which three key components make up a three-phase stationary power distribution unit? (Choose three.)

  1. Rectifier
  2. Panel board
  3. Input transformer
  4. Rack mount bracket
  5. Input circuit breaker

Answer(s): B,C,E



Which statement defines "service entrance"?

  1. The switchgear delivering AC power to a UPS
  2. The secondary side of a transformer at 208 V or 230 V
  3. The point at which power is distributed from a panel board to a receptacle or local power distribution within an IT enclosure
  4. The point where the responsibility of the electrical power infrastructure shifts from the utility company to the owner or tenants of the building

Answer(s): D



What is the advantage of a three-phase power source versus a single-phase power source?

  1. Three-phase power delivers balanced voltage across all three-phases.
  2. Three-phase power delivers up to three times the amount of power of a single-phase power source.
  3. Three-phase power cancels neutral harmonics on the 3rd, 5th, and 7th orders where Single-phase power does not.
  4. Three-phase power does not require a neutral; therefore, you can attain increased levels of efficiency over single-phase power.

Answer(s): B



What are three transformer types? (Choose three.)

  1. Step-up transformer
  2. Isolation transformer
  3. Step-down transformer
  4. Delayed input transformer
  5. Limited induction transformer

Answer(s): A,B,C



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