Just Crack Interview

Electrical interview questions – page 11

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

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  1. Which type of transformer connection is preferred in case of power supply transformers? (A) Star/Star (B) Delta/Delta (C) Star/Delta (D) Zig Zag/Star

  2. What is the function of a Master trip relay? why is it used ?

  3. Can we say current flows inside an atom as electron moves inside an atom?

  4. Can you tell me how we will select RTD and Thermocouples forTemperature applications. I.e How we will choose accurateone for a specefic operation if both having same ranges

  5. In a large three phase induction motors usually the value of full load slip is

  6. What is the ground clearance of 400KV transmission line?

  7. Induction type 1-p wattmeter reads ?..a) true value b) apparent value c)volt ampere value

  8. What is 11kv cable

  9. Whati s the sludge current in ups

  10. What is the difference between RMS and average value

  11. Why the frequency of ac in india is 50 hz but in some othercountries it is 60 hz.

  12. Three way plug point is there ,in that plug why we need earth pin is bigger than compare with phase and nutral pins?

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  14. How can we calculate the rating of capacitor bank to be connected for a particular load(ex.100kw)to improve the power factor from 0.8 to 0.9?

  15. How to calculate meter constant in HT yard pls give me example for this issue

  16. Why generator or any other system require Neutral Grounding and not Phase grounding

  17. What is power frequency withstand and impulse withstand of acircuit breaker?

  18. WHAT IS THE REASON FOR LOW VOLTAGE IN HOUSES?

  19. Why we are giving D.C. supply to field of an alternator, why can't we give the a.C. supply

  20. WHEN WE GETTING SHOCK, ITS WE GETTING FROM VOLTAGE OR CURRENT.

  21. How wti of transformer works?

  22. What is the acceptable earth resistance for Commissioning the Transformer?

  23. What are the differences between MCB and MCCB ?

  24. What is the function generator?

  25. How to connect surge arrester with equipment?

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  27. What is critical speed?

  28. 60 watt bulb and 1500watt iron which device has more resistance & why

  29. Why we did not feel electric shock in electric train?

  30. What type of protection used below 132KV feeders

  31. Define excitaton voltage and excitation current?

  32. 1KVA transformer of different frequencies of 50hz,100hz,500hz&1000hz. which one of these transformer has big size? Give reason

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