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MMLU-Pro / 11765 / A 50-hp, 500-volt shunt motor draws a line current of 4.5 amperes at no load.…

Problem

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question

A 50-hp, 500-volt shunt motor draws a line current of 4.5 amperes at no load. The shunt field resistance is 250 ohms and the armature resistance, exclusive of brushes, is 0.3 ohm. The brush drop is 2 volts. The full-load line current is 84 amperes. What is the horsepower output and efficiency ?

category

engineering

options

  1. 83.70%, 47.85 hp
  2. 86.50%, 49.00 hp
  3. 90.55%, 51.25 hp
  4. 92.10%, 52.00 hp
  5. 85.23%, 48.50 hp
  6. 90.00%, 50.75 hp
  7. 84.15%, 46.90 hp
  8. 89.45%, 50.36 hp
  9. 87.65%, 49.75 hp
  10. 88.30%, 51.10 hp

src

stemez-ElectricalMachines

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