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Electrical interview questions – page 16

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

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  1. What is third harmonic?what is the effect of it?

  2. What is the current rating of 2500 KVA,33KV/433v transformeron secondary(LT) side

  3. What is the harmonics.

  4. ON RADAR INTERFACE LEVEL TRANSMITTER IF DI-ELECRIC IS WRONG WITH CONTINIUS PROCESS THAN HOW CAN INDENTIFY OR HOW CAN I PUT NEW DI-ELECTRIC VALUE?(ROSEMOUNT-TDR-3300-COXIAL PROBE TYPE)

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

  6. WHY DG are rated in KVA or MVA ???., but ALL power plantsare rated in KW or MW.,null,?

  7. How can electricity is produced without water

  8. What are the insulation properties.

  9. What is the use of compensation in designing a transmission line

  10. What is hysteresis losses?

  11. Why we use auxillary relay ? what is function of differential relay, directional o/c relay?

  12. How a vibration switch's high signal will going to trip the motor? can u explain with some examplesand wiring diagrams?

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  14. Explain harmonics in simple words..........

  15. What is the difference between ELCB and RCCB

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

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

  18. In Railway,why we are used HT Line 25KV ?.why we are not used 11KV,33KV and others for This?

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

  20. Generally transmitter power supply having some range(12v to 35v) but the out put(4-20 mA) must same for given input.If we vary the power supply voltage then output mA also to be change according to V=IR. Is there any voltage regulator in the transmitter ?

  21. How to calculate the resistance values of single phase and3phase motors?

  22. What is micromotion transmitter? What is the porpose of using this transmitter?

  23. Star Delta Diagram with full description

  24. What is ring system ?

  25. Trasformer ratting

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  27. What is full form of dyn11( in transformer)

  28. Can we use metering current transformer as protection current transformer if not why? & if yes why?

  29. Why are use only 4 to 20ma. signal.

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

  31. What is the difference between star connected and deltaconnected motors

  32. What the effect will occur if we increase the airgap in induction motor

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