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

Electrical Engineering Interview Questions

Questions Answers Views Company eMail

what is the method of electric earth for the protection of low voltage electric equipment

MacLellan, Shiva Corporation, Siemens,

1 5825

WHERE to use CVT & PT.

Suzuki,

11 32684

how can calculated the rating of the 11 KV transformer?

NBCC,

6 12596

Why do we have 110V, 230V, 415V etc. in electrical transmissions? Why not 100V, 200V,400V?

4 11536

how circuit breaker work.. what is the operations taking place inside a circuit breaker when an overcurrent occurs... is it similar to fuse?

LTT,

2069

how many earthing is required for sever room?

4 7813

What is GIS Substation and how it operate? where these type of substation installed?

Power Grid,

8 35494

HOW many type of Circut Breaker in the world used in 400 kv substation?

Power Grid,

14 24782

What is difference between earth leakage relay and restricted earth fault relay ?

22 50253

why synchronous motor has zero starting ?

NTPC,

8 20835

how to find out capacitor range?

2 5768

what happens when d cexcitation given to alternator is removed while it is running or what happens when dc excitation is failed in alternator while running?

10 22039

why we are calculating the capacitance between phase(conductor line)and ground in transmission line?why cant we calculate capacitance between the phase and the nuetral line?if so what is procedure.

Mytrah Energy,

1 3677

what is the difference between VARIAC,AUTO TRANSFORMER,DIMMERSTAT.

10 35073

hi all i like to know vat is power plot in control systems also i want to know abt latest trends in electrical & electronics

1951

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Un-Answered Questions { Electrical Engineering }

what is the generator rating for 40 amp load of 3phase motor.?? 400v voltage of generator... plz tell me with formula its urgent...plzzz... and also tell me that this 40 amp at all phases mean 40 amp on red,40 amp on yellow,40 amp on blue...... or the total sum of that 3phase is 40 amp....

9231

Explain Need of a starter in a dc motor.? Also explain any two starting and speed control method of dc motor?

1720

thyristor controlled APFC panel design parameter?

1787

How we can change the direction of rotation of Induction motor? Prove it using graphical

2179

Logic using 1 kV or 1,1 kV grade in house wiring Low voltage cable. Explain/suggest? some use 1kV and some prefer 1.1kV grade insulation low voltage cable why??

1653

why the arc welding machines require parallel earthing systems? ie why each machines are connected to earth pit by separate wires during earthing? wats it adavantages?

2209

grr resistance & contrator malt continuous

2153

How to calculate the External Resistance required for 60HP slipring motor in case no any data of the Motor is available???

2061

Following test should be conducted to find out relative polarity of transformenr terminals A no load test B back to back test C phasing out test D none of above

2216

What is turn ratio of a transformer?

1237

Is there any relevant technique to produce power from light and heat energy of the sun simultaneosly from same rays of light?

1879

What Is HO factor in power selection

2075

How can I known multiplying factor .without multiplying table

1791

what is PID control in VFD drives?

2000

draw the restricted earth fault protection circuit install on power transformer and identify its parameters and draw C/C curve of it

2715

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