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Electrical interview questions – page 31

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  1. What is the basic principle of conductivity meter

  2. 400kw, 3.3Kv motor want to fix 1000km away from substation. What is full load current? and what is the cable size for motor? I amp expecting answer and advice from your side.. thanks...

  3. What is the difference between newtral earthing and body earthing?

  4. Make control wire diagram of start and stop a function witha single push button

  5. Explain about 4 wire instrument concept & tell about its wiring fron sensor in Field to PLC panel.Explain with an example?

  6. What take 100 w take current

  7. Why the energy meter disc rotates anticlockwise while reading

  8. What is protection for single phasing ?

  9. Can any one tell me the formula for calculating the power and unit consumpetion

  10. Advantages of vvvf drives over non vvvf drives for EOT cranes

  11. In 400 kv system why should trip both side CB when we give hand trip?

  12. How does a 3 phase induction motor is started?

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  14. State the care that shall be taken while checking the diode

  15. What is the difference between relay and a contactor.

  16. Can we correct the p.f.of ac generator?

  17. what type of winding of slip ring ac induction motor rotor and why.

  18. Why alternator output is connected to delta side in to generating transformer? any reasion?

  19. Why Trasformers rated in KVA

  20. What is 3 phase motors

  21. WHAT IS BASICS TO SELECTION OF 11 kv Trasformer, send any calculation sheet for selection of transformer

  22. What is min and max voltage between earth and neutral/phaseif it perfect earthing?

  23. In a 11000/440 V transformer, when any one phase of 11 KVsupply fails (ie., single phasing), what happens to thesecondary voltage and why?

  24. Is it possible to interlock between ACB & MCCB?

  25. As we know that N=120f/Pspeed of an im can be controled only through changing no ifpoles, can we control by changing the frequncy????

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  27. Please any one can explain how to calibrate transmitter (smart) online with out remove from the container suppose it is interface level or static pressure level measurement we dont want to remove transmitter from the container mean it is running plant please give me detail. thankx brothers

  28. Why we are using SDH Microwave instead of PDH?

  29. What are the layers of protection over armoured cables?

  30. WHAT IS PCCB?

  31. What is the function of anti-pumping in circuit breaker?

  32. What is %impedanece

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