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Which statement describes a three-phase power source?

Two voltage sine wave references consisting of two "hot" wires and a ground
One voltage sine wave reference consisting of a "hot" wire, a neutral wire, and a ground
Three voltage sine wave references consisting of one "hot" wire, one neutral wire, and a ground
Three voltage sine wave references consisting of three "hot" wires and accompanying neutral and a ground

Answer(s): D

How many amps is a NEMA 5-30R receptacle rated to support?

Answer(s): D

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

Answer(s): B,C,E

Which statement defines "service entrance"?

The switchgear delivering AC power to a UPS
The secondary side of a transformer at 208 V or 230 V
The point at which power is distributed from a panel board to a receptacle or local power distribution within an IT enclosure
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?

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

Answer(s): B

Free DU0-001 Exam Braindumps Data Center University Associate Certification Questions 51–55 (page: 12)