Electrical Engineering Interview Questions, Answers for Freshers and Experienced asked in various Company Job Interviews

Electrical Engineering Interview Questions

Questions Answers Views Company eMail

how to meas-our losses for L.T & H.T

2224

whether choke act as a voltage regulator in tubelight or not?

Bhel,

1 4905

How you will determine the volume of oil in a particular Distribution transformer.

1918

How to calculate the value of earth capacitance in a transmission line.

2408

what is the difference between contactors & relay.

2 5420

Spacing of Transformers ratings are 10kva,15kva,25kva,63kva,110kva,150kva .........so on Q) Why transformer are not manufactured having ratings in between or other than these standard ratings ?

3 6042

Define liftable weight of a transformer? Does the total weight of transformer include oil weight?

2537

ACCORDING TO IEC WHAT SHOULD BE THE MINIMUM HEIGHT OF G.I. STRUCTURE OF CT, PT, ISOLATOR, LA?

2265

what is the MF if CT ratio is 500/5 and in meter specification is 3.75 REVS/KWH? Thanks and Regards Selvendran.N

1 3772

Why relay connected R phase and B phase.?

1 4465

which part of transformer heats up the most and why? windings, core or oil .

Lafarge,

3 8031

How do you know when the battery is fully charged?

ABB, Pricol,

6 13172

If I want to connect a capacitor bank on the HT side of a 11kV/415V, 3 phase delta-star distribution transformer to supply Reactive power to it..what practical specifications of a Capacitor bank that can i've??please reply..

2551

Why is transformer a machine

Grasim,

1 2766

Why are the voltage levels in a powersystem are 11KV,33KV etc., why not 10KV,30KV?

2 5097

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Un-Answered Questions { Electrical Engineering }

In EHV transmission line a neutral grounding reactor is often placed at neutral point of shunt reactors. What is the recommended protection for this neutral grounding reactor? Should I use a fast closing switch to bypass neutral grounding reactor when this protection operates?

3295

What current flows in the transformer primary when its secondary is open?

1337

What shall be the secondary output voltage if the primary winding of a 220/6V, 50 Hz transformer is energized by an 110V, 60 Hz supply?

1425

What is nichols chart?

1399

What do you mean by transformation ratio of instrument transformer?

1123

how we calculate electrical load on a building according to area?

2847

What is the difference between acs 550 & acs 850

5855

Is it possible to make a 5P10/ CT Ratio 50/1A Burden 5VA

1770

send me any model test paper of clerical post of state bank of india.......

1895

Please clarify, 1. Is it required to lay two runs of GI wire along with Armoured LT cable if it is laid between one big mains (63Amps TPN SDF) to small main (32A TPN SDF) with proper glanding termination? 2. If the armoured cable with proper glanding is laid from DB to CNC machine, is it required to run two runs of body earthing to the Machine from DB? 3.If the armoured cable with proper glanding is laid from Substation to Hangar, distance is approx. 100 mtrs, is it required to do earthing at shop area though the primary termination at substation is earthed through gland.

2080

Define settling time.

1209

What is the function of probe in cro?

1260

Is it possible to obtain 480v or 550v in single phase output by giving the input to 230v to a single phase torodial type transformer without using a stepup transformer?

2046

we have a lot of model of rectifier but thyristor rectifier is the most rectifier that use in power system. Do you know why this rectifier is used?

1846

How 3 phase invertor works?

2121

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