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Electrical interview questions – page 18

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

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  1. How to calculate induction motor rating (HP) if name plate is missing from motor at site condition ?

  2. What is bushing in transfermor

  3. What is the purpose of using battery in dg sets, please specify in details.

  4. Why we called L-G fault as line to ground fault why ground?suppose if a line falls on building roof then can we called these fault as line to roof fault? please explain why ground term is used here?

  5. WHICH TYPE OF TRANSFORMER USED IN SWITCHYARD IN POWER PLANT?

  6. Why it is unable to birds to be on a 220kV 0r 132 kv lines like on 33kV and 11kV lines?

  7. Different between horse power and break horse power

  8. What happen if the parallel generator phase angle shift by 1 degree in manual mode

  9. How much capacity(rating) of generator required to operate a load of 100kv.

  10. What do you mean by boost voltage in case of battery charger?

  11. Why DP transmitters are subjected to high static pressuretest of 100 bar. Though they will be used for very smallpressure range

  12. Does power factor vary with speed?If yes, how?If not, why?

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  14. An input device is interfaced with Intel 8085Amicroprocessor as memory mapped I/O.The address of thedevice is 2500H.In order to input data from the device toaccumulator,the sequence of instruction will be

  15. Difference between MCC and PDB

  16. What can a fresh(without experience) electrical engineer contribute to NTPC( Or any PSU company) growth?

  17. In star delta Schematic can we connect OLR in delta circuit

  18. What is the out put of a CT? How the ratio is decided ?

  19. What is pf. how to calculate capacitor bank value to maintain unity pf.

  20. What is the use of impulse line in AFBC boiler , WHY WECONNECT IMPULSE LINE TO TRANSMITTER , DRFT GAUGE ETC ????????

  21. What is safety measures of transformers.

  22. What will be result if we connect LT votage to the terminal of HT Transformer?

  23. Why usually in all electrical equipment taking more current in Y pahse like pumps,compressor,or any other applications

  24. WHAT ARE THE CAUSES OF MOTOR VIBRATION?

  25. What is reason of rating of transmission line multi pal of 11 like as 11/33/66/220 ? Why not use 75 kv 23 kv line in power system ?

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  27. What is SMPS,How does it works?

  28. What is the difference between Pressure Safety Valve andPressure Relieve Valve, in what condition we prefer choosePressure Safety Valve rather than Pressure Relieve Valve?and vice versa

  29. How determine the capacity of refrigeration system?how we use condenser coils, compressor, capillarity,compressor

  30. Why generaters need four earthings

  31. Why 4 to 20 ma ,why not 0 to 20 or 3 to 15 or anything

  32. How many input terminal of single phase transformer.which is use for rural power distribution.

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