Interview questions

Quality Engineer - Electrical interview questions – page 3

165 questions. Tap “Show answer” to check yourself.

  1. What happens if any one of the phase is grounded

  2. We are getting voltage fluctuations suddenly for 2 or 3minutes again it becomes normal. we checked each and everyconnection some times we are getting 110 volts like thatfrom earth to neutral again it is reducing we are gettingsupply from 45 kva DG set give earthing properly.

  3. Explain the function of VFD

  4. At what condition restricted earth fault relay will act?

  5. How to determine capacitor bank capacity of one plant..

  6. What is differant beetween overload current and phase current?

  7. How would you plan a vacation ?

  8. Can you explain why should we select you fromthe number of applications we have received?

  9. Why ct ,cvt should be stored in a vertical position?

  10. HOW TO KNOW MOTOR WINDING IS STAR OR DELTA CONNECTED WITHOUT SEE THE INFORMATION TABLE AND WINDING CONNECTION ?

  11. What is the acceptance value of leakage current in HI POT test

  12. What is power factor?

  14. IF we have three 30KW motor, these motors are connected in DOL, star-delta and VFD respectively, what will be the fuse rating for the above three?

  15. What is the ciruit diagram of transformer vector grup test?

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

  17. 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?

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

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

  20. WHAT ARE THE CAUSES OF MOTOR VIBRATION?

  21. What is SMPS,How does it works?

  22. Why generaters need four earthings

  23. Is 3-phase induction motor need a starter ? why do it so

  24. What is Nominal voltage?

  25. Can we test the alignment of End shield and stator ofturbogenerator without rotor insertion? Also how to fixmaintain the alignment at site installation?

  27. What is Metering theory?

  28. Describe one of your memorable day?how is education useful for any body?

  29. How to check the insulation for motor using megger?

  30. WHY WE USE 4-20mA

  31. Which %age of corona losses increses if frequency isincreased to 25%.

  32. Can Induction motor run at over rated speed? ( 15oo rpm is rated speed for 50HZ. is it possible to ride 3000 RPM with same motor with the help of VVVFD for continues ride of 100HZ)

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