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Electrical interview questions – page 8

1,095 questions. Tap “Show answer” to check yourself.

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  1. How can we findout the maximum efficiancy of Transformer? At which load?

  2. How to decide the load on secondary of the tranformer

  3. Why a capacitor blocks the DC signal?

  4. What is the unit of vaccum?

  5. Three phase alternators are connected in star connection why?

  6. Why phase always came one direction in 5pin socket(righthand or left hand) which direction and why..........?

  7. What is meant by fuzzy logic? what is fuzzification and defuzzification?

  8. How to select the different contactors ( starter combination) for different AC motors? what about fuse cappacity 4 different motors too?

  9. Why dont we use the same pylon to carry 400 kv plus 220kv and 33 kv ?

  10. How to calculate sizing of NGTR (Transformer rating,Loading resistor value and Current rating of resistor) and what is the X/R ratio.Details : 11kV,Capacitance 1.73532 micro farads,40kA for 1sec.

  11. In 132 kv transformer , in which range of transformer oil bdv required ? if it has around 50-55 , then how it was insulated the winding ?

  12. Transformer core are laminated for what purpose?

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  14. What are the industrial applications of SuperhetrodyneReceivers ?What are merits & De-merits of SuperHeterodyne Receivers ?

  15. If two induction motors A and B are identical except that the air-gap motor 'A' is 50 % greater than that of motor 'B', then

  16. Why transformer ratinh is in KVA????/

  17. In 132 kv substation ligtning arrestor(120 kv) connected to line. but line voltage comes to 132 kv, it operate or not???

  18. TELL THE DIFFERENCE OF WELDING TRANSFORMER AND WELDING RECTIFIER AND WELDING INVERT ER AND WHICH PLACE IS USED WHICH TYPE

  19. WHY TEMPERATURE TRANSMITTER USED AS WE CAN CONTROL THROUGH THERMOCOUPLE/RTD

  20. What is the potential of 11kv A.B.Switch

  21. How is a capacitor bank is designed ?

  22. What is the meaning of TRI Vector meter?

  23. What is the difference between Ac curent & DC current

  24. Where is the center of magnetic field in alternator

  25. How to check thermocouple ,its working or not?

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  27. What the main causes of transient interruptions on Over-Head Distribution Lines?

  28. What is electronic regulator and how we can use that in fans?

  29. Why the supply frequency used in America is 60Hz while thatused in India is 50Hz?,

  30. What is rated speed?

  31. Earth leakage relay basic knowledge principle

  32. How to calculate the size of cable for 100 kva load,?can somebody tell me with a formula

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