Electrical Engineering Interview Questions
Questions Answers Views Company eMail

what is transformer?

2 3722

why DC is not generated instead of AC?

4 6318

Name the instruments which run on DC?

2 3029

How may I get the maximum current capacity for a particullar size Alluminum or Copper cable if there is compulsion to use?

1447

How to decide whether A / B / C / D curve type MCB should be used?

1845

WHY IS wet surface used for grounding???

2 4034

how to find insulation resistance of a motor(415v) by theoretical formula??

2 6294

what is the diff.between neutral and earth?

4 5418

why the iron chains were hanged at the back or front of the trucks earlier which were touching the earth?

2 3355

Is there such a frequency as 440v 50Hz?

1 2886

My switchgear busbar is rated at 2000A and just imagine the actual load on busbar is 1000A. From that busbar there are 10 outgoing feeders. Now the question is will the load be 1000A on each outgoing feeder or 100A per outgoing feeder. 2nd thing how do i calculate the load on individual feeder. Thanks for your time. Please provide some clarification on this issue.

Alstom,

1 4577

hello friends.. I have a doubt regarding the operation of dc machines.. I studied in a text book that a dc machine can be used as a generator and as a motor.. is this possible? If so,please send me the info about this topic.. you can also send your info to my mail.

Bhel, CVL,

1533

what is mean by dual digital protection in the relay field?

ABB,

1467

HOW TO CALCULATE GROUND FAULT CURRENT IN 430V 4000AMP AIR CIRCUIT BREAKER?

2 5111

draw a circuit diagram connecting transformer OLTC- RTCC- VCB-Marshalling Box otherwise Explain in words

1 22120


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Un-Answered Questions { Electrical Engineering }

in cvt,there are two windings,1a,1n and 2a,2n.in my one project i use only one winding i.e.1a,1n. the other winding is not in use, so i connect it in open delta and want to close it by ibsertibg thermal resistor. the output of cvt is 132kv/115/sqrt3. plesae tell me exact value of resistor, so i may close it to avoid the resonance phenomenin. send me answer on this email adress please. aetcon-po@aetcon.com

2152


Is there any abbrevation for STUB in Stub bus protection

1488


wat system call?

1528


How I can Compare 120v/60Hz versus 220v/50Hz ? Please tell me both advantage and disadvantage ......

1553


Why the efficiency of generator is more than motor in swinburne's test

1569






What are the types of windings according to the construction?

596


why we take movement of rotor always in counter-clockwise direction in 3-phase induction motors?

1504


What is diversity factor in electric installations?

699


how to calculate current carring capacity of cable and cable selection? 1) copper flexible cable 2) copper armoured cable 3) Aluminium cable

1052


What is the difference between line drop and percentage line drop?

1071


What is the meaning of C1, C61, C91 cable

2815


Explain (in simple ) - root mean square. whats its role in electrical fundamandal.where its used

1802


How to select HT/MV cable size ?

1988


Is there any type of starter for DC motor other than two point,Three point and Four point starters?

1648


Maintenance of transformer???

1800