Power System Protection MCQs Part 20

Power System Protection MCQs Part 20

Overvoltage surges in a power system may be caused by

Overvoltage surges in a power system may be caused by:

  1. Switching
  2. Resonance
  3. Lightning
  4. All of these

Correct answer: 4. All of these

Merz-price protection is employed for protection of

Merz-price protection is employed for protection of:

  1. Alternators
  2. Transformers
  3. Both of these
  4. None of these

Correct answer: 3. Both of these

Which of following is used for protection of power system against travelling waves

Which of following is used for protection of power system against travelling waves:

  1. Earthing screens
  2. Overhead ground wires
  3. Surge diverters
  4. None of these

Correct answer: 3. Surge diverters

Which of following is used for protection against direct lightning strokes

Which of following is used for protection against direct lightning strokes:

  1. Lightning arrester
  2. Ground wire
  3. Both of these
  4. None of these

Correct answer: 3. Both of these

The ideal scheme for overhead transmission lines protection is

The ideal scheme for overhead transmission lines protection is:

  1. Distance protection
  2. Differential protection
  3. Time-graded overcurrent protection
  4. None of these

Correct answer: 1. Distance protection

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