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Delmar,. questions and answers already solved 2024

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  • October 2, 2024
  • 2
  • 2024/2025
  • Exam (elaborations)
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  • delmar questions and answers already solved 2024

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  • DELMAR
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Delmar's Electricity unit 27
The horsepower rating of a three phase motors and the kilovolt-ampere rating
of three phase transformers are about ----- greater than for single phase
motors or Transformers with a similar frame size - correct answer ✔150
percent


In three phase power systems, the delivered power----- - correct answer
✔Never falls to Zero


In a Balanced three-phase system, the conductors need be only about------
the size of conductors for a single phase, two wire system of the same
kilovolt-ampere (kVA) rating. - correct answer ✔75 percent


The three phase connection in which one end of each of the windings are
connected together is called a ---connection - correct answer ✔Wye


In a wye connected system, the line voltage is higher than the phase voltage
by a factor of ------ - correct answer ✔The square root of 3. (1. 732)


Line current and phase current are the same in the -----configuration - correct
answer ✔Wye


Three phase voltages are -----out of phase with each other - correct answer
✔120 degrees


Line voltage in phase voltage are the same in the ----- connection - correct
answer ✔Delta

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