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Electrical Engineering Interview Questions
Questions Answers Views Company eMail

what can i do, if i want to carrier in design as i am electrical engg?

3 4083

What happens when the field of an alternator connected to infinite bus is suddenly removed?

3 5122

Why the airgap of an induction motor is less compared to that of a synchronous machine?

MGVCL, RRB, WebTech,

4 27011

A 100 MVA transformer may be cooled with?

HCL,

6 8448

Supose we have one 220v A.C fan.if we provide 220v D.C what will be happen?

13 20075

What is the difference between CT for protection and Ct for metering?

BirlaSoft,

16 112811

what is the surge arrestor?how it operates?what is the range for it?

4 4643

what is the circutor?why we use it ?

1439

what is the difference between star and delta connection ? when we use each one ?what is the best ?

Amara Raja, Daikin,

14 46777

how the alternator transfere mechanical energy to electrical one ??

3 3304

what is the difference between power and distribution transformer?

L&T, VJTI, Wenke Electricals,

32 54006

what will be happen if we apply D.C supply to the transformer

CCBPL,

14 16752

what is reactive power?

8 6744

plz tell me about for how many rating (for 500kva)how much current taken?

13 32228

I am working as maintenance engg. in electrical but i want to do carrier in electrical drawing.Tell me about that.

2 2693


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Un-Answered Questions { Electrical Engineering }

what would u consider to be the basic purchase order information you would need to proceed with a cable inspection assignment?

1045


where can the transformer having vector group Yny0 be used??

2926


What is Auto Mains Failure Panel & Auto Synchronizing Panel

1026


How to check the thermocouple is correctly connected to cable for K type? (i,e positive pole is connected to non magnetic conductor and negative pole is connected to magnetic conductor)

872


To prove the capacity of a 10MVA transforemr with 6.5% impedance by a short circuit test how much power is needed to inject an impedance voltage if we have to arrive for its rated current?

1075






Whar is the KvA rating of 33Kv substation & actual kv rating of power generaating station.

1487


Assuming that a dedicated neutral earthing transformer is provided for each GT generator, when the two generators are running in parallel, has consideration been given that the earth fault current from one generator stator winding be split between the two neutral earthing transformers? If so, what adverse impact will this have on the operation of the 59N and 27TN devices?

831


how to protect motor in dol starter having capacity of 30 hp.40 hp?

2450


I use 20 nos led tube 4feet, in pathway 100mtr approximate, so what size cable i use for lighting

632


How we can defined theecopper cable size if we know the aluminium cable size?

970


How many gap between finger contact in a.c.b. and v.cb.?

309


TRAFO 1. WHY BREATHER IS USED. 2. WHY OIL GOES DOWN IN CONSERVATOR TANK. 3. WHY WE ARE TAKING OIL SAMPLE TAKING FROM BOTTOM OF TRANSFORMER. 4. HOW TO CHECK IR VALUE OF TRANSFORMER. 5. WHY OLTC HAVING BUCHHOLZ TRIP ONLY; WHY NO ALARM. 6. OFF LOAD TAP CHANGER OPERATION PROCEDURE. 7. TR. SHUTDOWN / ISOLATION PROCEDURE. 8. WHEN THREE TRS. IN PARALLEL, ONE TR. IS NOT SHARING THE LOAD – WHAT IS REASON AND WHAT YOU WILL DO. 9. WHY TR. HAS OLTC IN HV SIDE. 10. WHAT IS % IMPEDANCE. 11. WHY TR. RATING IN MVA. 12. WHAT IS VECTOR GROUP IN TR. 13. CONDITION FOR PARALLEL OPERATION OF TRS. 14. WHAT IS TERTIARY WINDING. WHERE IT WILL BE. 15. IF TR. TRIP ON BUCHHOLZ OR TAP CHANGER RELAY, WHAT YOU WILL DO. 16. DIFFERENCE BETWEEN OIL TEMP. AND WINDING TEMP. PROTECTION 17. HOW WINDING TEMP. IS MEASURED IN CAST RESIN TR. 18. DIFFERENT TYPES OF FAULTS IN TR. Trafo - Page-1 of 2 19. WHAT HAPPENS WHEN TR. CHARGED FROM LV. 20. WHAT WILL YOU DO IF MEGGER READING SHOWS ZERO BETWEEN LV WINDING AND EARTH. 21. CAN WE INTERCHANGE BUCHHOLZ RELAY OF MAIN TANK AND OLTC TANK. 22. IF THE LINE BETWEEN BREATHER AND CONSERVATOR TANK 23. LOCKED, WHAT WILL HAPPEN DURING LOAD CYCLE. 24. WHAT IS THE FUNCTION OF OIL SEAL IN BREATHER. 25. WHAT ARE LOCATIONS FOR BUCHHOLZ RELAY FIXED IN POWER TR. 26. WHAT ARE CHECKS IN POWER TR. DURING MAINTENANCE. 27. WHAT IS IMPORTANT WHEN WE CHECK OLTC OPERATION DURING MAINTENANCE. Trafo - Page 2 of 2

1582


explanation of mesh bus bars

1271


How can we decide cable size from HT panel to Transformer? Please give you reply with some examples.

1369


What are Contactors? How they works and what its highest rating?

1109