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Electrical interview questions – page 24

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

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  1. What is a soft start?

  2. Different types of electrical cable?

  3. How much distance is required for earth pit to earth pit in substation???

  4. Why Ma signal is using for control system?

  5. SPEAK ON LARGE HADRON COLLIDER(LHC)?

  6. HOW TO FIND OUT 1. LINE CURRENT, 2. PHASE CURRENT IN AN ALTERNATOR / TRANSFORMER WHICH IS FEEDING A I)STAR LOAD ii) DELTA LOAD, USING A CLAMP METER. NORMALLY WHEN WE USE CLAMP METER IN A DG SET THEN WHAT DO WE GET?? PHASE CURRENT OR LINE CURRENT.

  7. What is the basic difference between capacitor and condenser ?

  8. What use can we make of 3rd harmonic component

  9. What is the speed of electricity?

  10. What is skin type thermocouple?how it is installed?what is the difference b/w thermocouple & skin type thermocouple?what is gounded & non-grounded thermocoplle?what is the diff b/w these two?

  11. At the time of 1st charging of transformer, there were huge inrush current, so why at that diffrential relay are not operated? Why?

  12. When a field input to plc is coming from 400 to 600 meters and the input is in 24 V DC? So signal cable of which cross section i should select for proper signal to plc?

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  14. What does ?battery of 180 AMP HOUR? mean to you?

  15. If we want the fan to consume less electricity at lowspeed, what do we have to do?

  16. Can we use delta-star neutral grounded 3 phase powertransformer bi-directionally.

  17. In thermocouple could we use the lug for termination or not,Thermocouple is any time,I am currently concerned with K type.please let me know if anybody know

  18. Through which medium return supply given to alternator

  19. If voltage is not builed up in small generator what will be the reason?

  20. What are smoke detectors ?

  21. What is the d/f between DOL & star delta starter & automaticstar delta starter?

  22. How does HT work & Voltage required?

  23. What are the automatic controller MODES?

  24. What is the gain of 1-s/1=s at 1 rad/sec?

  25. If I have a motor of 1MW with 6.6kv, running at 35% load, how can i save energy without reducing the load ?

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  27. What will happened if the neutral of secondary of Xformer ( Star point) Note it's above KVA rated Xformer

  28. What types of testing in 11Kv Ht switchgeat during testing?

  29. Why we generate transmit and distribute electrical supply in multiple of 11

  30. Why breather called breather ?

  31. Working of conservator tank.?

  32. How to set the transformer differential relay

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