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

Electrical Engineering Interview Questions

Questions Answers Views Company eMail

Why 66KV is step down to 11KV and then 433v, not directly 66KV to 433v ?

2 8870

Why the cores of large transformers build up of circular cross section?

2290

What is Instantaneous Earth fault relay,how will work

2229

Alternator rotor earth fault relay circuit

2076

why there is a fault occurs, if a phase wire touches ground.. and the fault not occurs when we connect a bulb between phase and ground..??

1 3658

what is the difference between general inverter and solor inverter clerly explain plz

2097

plz explain the snubber circuit unit

1 4902

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?

TATA,

3234

What are the precautions to be taken before working on a cable?

Alfanar,

1 4498

How can you limit the fault level in a power system?

Alfanar,

1 4545

What are the condition for parallel operation of transformers?

Alfanar,

2 5627

What are the point of a single core cable to be earthed?

Alfanar, Jindal,

2 6329

hi i wonder will the speed of a 50hz AC motor reduce if i supply it with 25hz?

Divis Laboratories,

4 6562

why transformer impedance measure in % (percentage)

Hindalco,

4 8737

what effect on electrical equipment if PF is gone over 0.996 in leading when provider say that its keep in minimum 0.996lagging

ABB,

3 7434

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Un-Answered Questions { Electrical Engineering }

When MICC cables used ?

2081

while starting a liquid starter ,is there any volage drop on water/soda on tank.can we touch the tank on starting?

1917

why HT armoured cable does not glanding

4232

Name of the relay of low lub oil presuure in DG sets

2050

Greeting to all members, How to calculate spill current when we have different ratio CT and Class for REF(Low Imp) I have 500/1A 5P20 @line side n 400/1A CL.X @ Neutral.

2997

where the lexical paramater will use in fron end?

1867

what are the differant std sizes of cable trenches?

2051

Why in 6 KV XLPE cable termination kit used and why not in 380 V xlpe cable same is not used

2634

Comment on the working principle of operation of a single-phase transformer.

1199

In power transmission using open belts or horizontal shafts it is preferable to have the slack side of the belt on the top because

1221

In synchronous motor, how the field current is related to armature current..i know its inversely proportional..but concept wise...i was nt clear....pls help me...

2038

Dear sir, How to calculate 3.5 core pvc aluminium armoured cable meter wise carrying amps rating.Please give the solution with a good example.

1876

can you any one give exact mathematical relation between AC current and DC current?

2001

how can we determine size of a cable by knowing the kw or current rating of a load?how can we calculate the resistance box of a slip ring motor?

1760

How can I known multiplying factor .without multiplying table

1791

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