Just Crack Interview

Electrical interview questions – page 15

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

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  1. If earthing is used in place of neutral how the circuit completd.

  2. What is C curve and D curve of MCB?

  3. WHAT HAPPENING TO TRANSFORMER????i have the step down transformer rating 230/12v, powerrating something.,null,, ok. suppose iam giving 12v to secondaryside,what will happen on primary side.,null,,

  4. You required 5A from the transformer but you get 8A. How do you minimize this?

  5. What is difference betwen genrator and alternator?

  6. Short circuit test of transformer gives what?

  7. What is the use of arc chute in ACB?

  8. what happens if any one of the phase is grounded

  9. Why carbon brushes are used in motors?

  10. What is the function of series reactor

  11. Why we create vaccume in transformer tank before oil filteration?

  12. What is merz price protection

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  14. 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.

  15. In three pin pluge there three pins one is phase and secondis earth third is nutral why nutral high diameter comparewith phase and earth

  16. Which one is easy to control AC or DC Machine?

  17. Why we use capacitor in Fans not resistor?

  18. What is the work of trip circuit supervision relay?

  19. Explain the function of VFD

  20. What are the probable causes for failure of heating elements

  21. Critical losses of transformer

  22. What is the relation between Sq mm of wire and its current carrying capacity?

  23. Why DC excitation is used for alternators? Why cant it be AC?

  24. What is the difference between induction motor and the Synchronized one?

  25. What are different type of triping equipmen like MCB,MCCBand their differences

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  27. Why we remove capacitor connection in 3 ph Induction Motor while taking noload test.

  28. How ship earthed?

  29. What is the difference grade avail in welding electordes ?

  30. How can you access index

  31. If carbon brushes spring tension either loose or tight, what happen on Motor performance During Full load Operation?

  32. Why there is Powerfactor difference when we compare to our Capacitive Panel and TNEB side?

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