Electrical Engineering Mcqs

Electrical Engineering MCQs for competitive tests, job tests, university exams are provided on various Electrical and Electronics topics.

  1. Basic Electrical Laws and Theorems
  2. Basic Voltage and Current MCQs
  3. High Voltage Engineering MCQs
  4. Induction Motor MCQs
  5. Power Electronics
  6. Power Distribution MCQs
  7. Power Generation MCQs
  8. Power System Protection MCQs
  9. Power Transmission and Distribution MCQs
  10. Semiconductors theory MCQ Questions
  11. Synchronous Generator MCQs
  12. Synchronous motor MCQs
  13. Transformer MCQs

Transformer MCQs Part 14

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Transformer MCQs Part 14 Calculating transformer secondary turns numerical The no-load ratio of a 50 Hz single phase transformer is 6000/220 V. The value of maximum flux in core is 0.06 Wb. What is the number of secondary turns? 10 12 17 26 Correct answer: 17 From formula: Es = 4.44 * f *   Ns … Read more

Transformer MCQs Part 13

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Transformer MCQs Part 13 The all-day efficiency of a lighting transformer is always _________ its power efficiency The all-day efficiency of a lighting transformer is always _________ its power efficiency: Less than Equal to Higher than None of these Correct answer: 1. Less than A 3000/150 V, 30 kVA transformer has 50 turns in secondary. … Read more

Transformer MCQs Part 12

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Transformer MCQs Part 12 An ideal transformer is the one that has An ideal transformer is the one that has: Same number of primary and secondary turns Same voltage per turns on primary and secondary side Both of above No losses and leakage resistance Correct answer: 4. No losses and leakage resistance Explanation: An ideal … Read more

Transformer MCQs Part 9

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Transformer MCQs Part 9 A core type transformer provides A core type transformer provides: Shorter magnetic path Longer magnetic path Lesser average length per turn None of these Correct answer: 1. Shorter magnetic path Open-circuit test on transformer is carried out in order to determine Open-circuit test on transformer is carried out in order to … Read more

Transformer MCQs Part 8

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Transformer MCQs Part 8 Eddy current losses in transformer are directly proportional to: Eddy current losses in transformer are directly proportional to: Supply frequency Thickness of core lamination Square of thickness of core lamination Flex density in the core Correct answer: 3. Square of thickness of core lamination Which of following is correct for a … Read more

Transformer MCQs Part 7

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Transformer MCQs Part 7 Mutual flux in transformer remains constant at all loads since Mutual flux in transformer remains constant at all loads since: Leakage flux is small It uses iron core Applied voltage and frequency are constant None of these Correct answer: 3. Applied voltage and frequency are constant Certain transformer takes 0.4 A … Read more

Transformer MCQs Part 6

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Transformer MCQs Part 6 What is the full load secondary current of a 2000/200 V, 20 kVA transformer What is the full load secondary current of a 2000/200 V, 20 kVA transformer: 100 A 200 A 300 A 400 A Correct answer: 1. 100 A Solution: kVA/Secondary Voltage = 20*1000/200 = 100 A Certain transformer … Read more

Transformer MCQs Part 5

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Transformer MCQs Part 5 The no-load primary current Io is about what percentage of full-load primary current The no-load primary current Io is about what percentage of full-load primary current: 3-5% 10-15% 15-30% 30-50% Correct answer: 1. 3-5% Certain transformer has an efficiency of 80% and works at 100 V, 4 kW. If secondary voltage … Read more

Power System Protection MCQs Part 16

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Power System Protection MCQs Part 16 Which of following is an advantage of isolated neutral system Which of following is an advantage of isolated neutral system? Voltage oscillations Persistent arcing ground Difficulty in earth fault relay All of these Correct answer: 4. All of these. The grounding method that is employed to reduce the tower … Read more