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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, Siemens, Shiva Corporation,

1 3284

WHERE to use CVT & PT.

Suzuki,

11 22646

how can calculated the rating of the 11 KV transformer?

NBCC,

6 6488



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

 4 7632

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

LTT,

754

how many earthing is required for sever room?

 4 4109

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

Power Grid,

8 27238

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

Power Grid,

14 15449



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

 22 33435

why synchronous motor has zero starting ?

NTPC,

8 13687

how to find out capacitor range?

 2 2979

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 14224

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 1346

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

 10 21814

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

 710

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Un-Answered Questions { Electrical Engineering }

if a 3phase 100kva distribution transformer , 400 v,50 hz, 4-wire system is loaded at 160 k.w mostly 1-phase Lighting & Airconditioning split a.c load what will be the net effect on the power system in terms of voltage, powerfactor, current , efficiency of xformer

677

What is distance between electrical panel to land ?

97

and gate circuit diagram,amplifier circuit diagram

839

what is the criterion for selecting vector group of Transformers ? i mean how to decide vector group of Generator transformer, substation trasformer and transformer at consumer end

998

i applied for c licence with my one year apperents trainee and i have attaced with A grade contractor company experiance that is for 14 monts experiance this document is sufeicant for c licence? pls tell why they rejected

796




why 15 kw motor winding resistance is low then 5 kw motor winding resistance?

875

What are the symptoms of a bad PG card of a drive (inverter) esp. of Yaskawa Ac Drives (inverters) G7 ?

636

what do w do when the output of generator is fluctuating?

920

What are the differences between single phase and three phase?

692

How should i design a 1ph & 3 ph transformer. Kindly let meknow all steps and formulaes related to design from scratch.

754

why the value of k is more in shell typr transformers?

666

how diside ct mf exmp.200/5 ct

778

what is the reason for indication of light in the earth lamps of main switchboard.if there is an earth why does one lamp get dim and the other two bright.

976

what is the differebt between ac and dc fuse?

956

what is a speed of rotor when we give supply to stator of 50hz and as well as rotor of 60hz of an induction motor?????

438

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