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Electrical interview questions – page 7

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  1. When voltage gets down the current of motor increases. but according to Ohm's law voltage is directly proportional to current. plz explain

  2. What are the Steps for Testing of 20MVA (make:-CGL) Transformer? How many Test we have to do?

  3. What power factor maintain you maintain at u r organisation

  4. If ELCB and RCCB connected in series,what wiil be the result

  5. What is the full form of FRL (3/20,7/20 EARTH WIRE)..????

  6. What are the advantages and disadvantages of switch

  7. What is the function of Droop CT and where it is used?

  8. Define the overload capacity of the motor.

  9. What is EHT(Abrebiation,Function,Voltage Regulation & how it works?

  10. Why buchholz relay installed in inclined position

  11. How to calculate kA rating of device?

  12. HOW MANY EARTHINGS REQUIRED FOR GENERATER

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  14. How many earthing required for ups, what should be the earth voltages

  15. Do you know how to measure the earth resistance? if so explain it

  16. What is the principle of generator, motor, and transformerand explain the definiton of flemings left hand rule , righthand rule and ohms law

  17. In 63kva LT Distribution Box Why the outgoing of 63A kit kat is connected to 200 A link disconnector? as the output of kit kat is only 63 A?

  18. 2 hp motar how many amps taken please show me the formula

  19. What is Vk and Imag i.e Knee point voltage & Magnetising Current?How to calculate above values?How to define accuracy class 5P10?

  20. What is the make of breakers, transformers, generators? What are their capacities and ratings?

  21. What is difference between fan and blowers

  22. What si the d/f b/w KVA & KWH, kvarh & kvar, kwh & kvarphase voltage & line voltage

  23. How much load with stand the copper cable by sq mm apro..

  24. How to calculate the size of the conductor for particular load

  25. Why in USA supply voltage parameters(230V,60Hz)are different,is there any advantage please brief.

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  27. How to calculate the ngr capacity(nutral grounding resistor)

  28. Why we does earthing for transformer neutral point

  29. Why can't we increase the voltage by increasing the fieldvoltage in order to get higher voltage.so that we caneliminate step up transformer

  30. DIFFERANCE BETWEENfunction of ELCB?function of rccb?function of mccb?function of acb?function of mcb?

  31. Why voltage coil in wattmeter called as pressure coil why the pressure term is used in wattmeter?

  32. How much binding wire is reqd for 1 MT

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