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Electrical Engineering Interview Questions and Answers

May 11, 2018 by admin

  1. If one lamp connects between two phases it will glow or not?
  2. What happens if a capacitor is connected to a generator load?
  3. What is stepper motor. What are its uses?
  4. Battery banks are in connected in series or parallel and why?
  5. How to determine alternating current frequency?
  6. In a Tap changing transformer, tap is connected in the primary side or secondary side?
  7. What is the function of interposing current transformer?
  8. What is reverse power relay?
  9. Why is the starting current high in a DC motor?
  10. Why, when birds sit on transmission lines or current wires doesn’t get shock?
  11. What will happen when power factor is leading in distribution of power?
  12. What is the full form of KVAR?
  13. What is the significance of vector grouping in Power Transformers?
  14. What are HRC fuses and where it is used?
  15. What is vacuum circuit breaker and where it is used?
  16. What are the benefits Consumers for maintaining good power factor?
  17. Why are three phase alternators generally star connected?
  18. What are the types of single phase Motors?
  19. Why starting motor is required in a gas turbine power plant?
  20. What is the function of damper winding in an alternator?
  21. In a power supply what will happen if the filter capacitor is shorted?
  22. In a power supply what will happen if the filter capacitor opens?
  23. What are the functions of surge tank in hydro power plant?
  24. What is synchronising of alternator?
  25. What are Turbo alternators?
  26. In a centre tap full wave rectifier but will happen if one diode opens?
  27. Why are alternators rated in KVA?
  28. Why electric heating is preferred over the other form of heating?
  29. What are the factors that affects the battery capacity?
  30. What is Joule’s law of electric heating?
  31. Why the slip is never zero in an induction motor?
  32. Why single phase induction motor is not a self starting?
  33. Why the 3 phase induction motor is self starting?
  34. Why do we need transmission lines?
  35. What is the difference between transmission and distribution lines?
  36. What is the meaning of Ferranti effect?
  37. What happens when a person gets an electric shock?
  38. How many volts of electricity can a human survive?
  39. What is the purpose of a stabilizer?
  40. What is the working principle of alternator?
  41. Why can we not store AC like DC ?
  42. Why does a transformer work for AC and not DC?
  43. How many types of DC motors are there?
  44. What is the minimum safe distance from power lines?
  45. Can we give AC supply to DC motor?
  46. What is difference between half wave and full wave rectifier?
  47. Why is DC excitation used in a synchronous alternator instead of AC excitation?
  48. What’s the minimum voltage dangerous to human body?


Also Read :

  • Why all the voltage levels are multiples of 11 kV? asked by Bahu
  • What is the function of a choke in tube light? asked by varu
  • What is the difference between Earthing and Grounding? asked by admin
  • What is the meaning of DYN11 in a transformer? asked by Hiter


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