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Electrical interview questions – page 14

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

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  1. I have a wire.and the current flowing in that.when we cut the wire then why dont we see the electrons....

  2. ELECTRICAL MACHINE

  3. How can you calculate the value of external resistance inserted in a slipring industion motor? (eg. 110 kw / 990 rpm/50Hz/stator v-415/stator Amp-195/Rotor V-440/Rotor amps-151.)

  4. Suppose in dcs range of a flow transmitter is 10t/hr what is dp for 50% in 2500mmwc

  5. What is use of 3phase instead of single phase?

  6. What is ics,icu,icw of load breaker

  7. WHAT IS THE MEANING OF KEY SINGLE LINE DIAGRAM?

  8. Why the starting torque is high in dc series motor..

  9. How to calculate the battery Ah? what is the formula.

  10. Difference b/w sonication and homozinization?

  11. If we keep frequency constant can we cal a synchronous generator as a dc generator

  12. Which type of Load is BULB/LAMP ie R,L,C? reason

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  14. SHEAR FORCE AND BENDING MOMENT DIAGRAMS

  15. Why 4-20 mA signal is preferred over a 0-10V signal

  16. What is current

  17. Why CT ratio stand for 50/5, 100/5, 25/5.

  18. Which one is more accurate servo or stepper motor and why?

  19. What is the maximum load on for 10 kva & 25 kva transformer

  20. What is double delta conection in AC Motor? And can we done the double RPM of the motor by double delta conection?

  21. Why stone used in Transformer yard.

  22. How we calculate size of exciter(excit. volt and current) for generator?

  23. For a DY11 lighting Transformer on primary side whee to connect fourth lead? from nuetral or from ground?

  24. Residual voltage & residual current used in which protection?

  25. What will happen to magnitude of voltage of other two phases if one phasw will touch the ground?

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  27. Why the rating of dc machine is in HP??/Do reply guys..Its very important......

  28. What is meant by H.R.C fuse?

  29. How many straight through joint is permissible in single core 33kv XLPE cable for a length of 985 mtr.

  30. What phase difference between p and s winding of transformer

  31. Is there any difference between inverter and a battery

  32. What is difference between AC VVVF drive & Dc VVVF drive explain their working principle?

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