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Fundamentals of Electrical Engineering Unit 5 – Electrical Installations: important questions for AKTU

Unit 5 (Electrical Installations) questions that AKTU repeats most often. This unit carries about 21 marks per paper. Start with the repeated questions, then the most asked topics.

Most repeated Unit 5 questions

  • Draw and explain the characteristics of a battery. Calculate the backup of a battery of 150AH connected to load of 150 watts, and the supply voltage is 12V. (10 marks, 2022, Types of Batteries) – also asked in 2022, 2023, 2024, 2025, 2026
  • Explain the construction, rating, specific applications of at least two types of wires and cables used in electrical installations. (10 marks, 2022, Wires Cables and Bus-bars) – also asked in 2022, 2023, 2024, 2025, 2026
  • Describe the importance of earthing in ensuring electrical safety and protecting equipment. (7 marks, 2026, Earthing and Lightning Protection) – also asked in 2022, 2023, 2024, 2025

Most important Unit 5 topic

  • Protective Switching Devices (Unit 5: Electrical Installations) – asked 10 times in 2022, 2023, 2024, 2025, 2026

Most asked Unit 5 topics

  • Protective Switching Devices – asked 10 times
  • Wires Cables and Bus-bars – asked 8 times
  • Types of Batteries – asked 6 times

More Unit 5 previous year questions

  • How does a fuse protect an electrical circuit? Also discuss the working of following: (i) ELCB (ii) MCCB (7 marks, 2026, Protective Switching Devices)
  • (i) What is the fundamental difference between a wire and a cable? What is Bus-bar? (ii) What is a battery's fundamental principle? Also specific types of battery types. (7 marks, 2026, Wires Cables and Bus-bars)
  • Explain briefly the SFU. (2 marks, 2025, Protective Switching Devices)
  • What is Switch fuse unit (SFU)? (2 marks, 2025, Protective Switching Devices)
  • Discuss briefly the types of batteries and explain anyone with diagram. (7 marks, 2025, Types of Batteries)

Unit 5 syllabus topics

  • Protective Switching Devices
  • Wires Cables and Bus-bars
  • Earthing and Lightning Protection
  • Types of Batteries