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Electrical Engineering Interview Questions
Questions Answers Views Company eMail

What is Grounding?

 2 4357

how u change the vector group of a transformer like DYN1 to ynd11

 2 5126

What are the types of circuit breakers ?

Genco, Super Max,

6 6606

Merits & Demarits of Oil circuit & Air circuit breakers ?

Genco,

1604

Two CTs 1600/1 and 35/1 are in series. while checking the ratio test of a CT(1600/1),same 1600A will also pass through the CT having ratio 35/1. Will it be harmfull to the ct(35/1),if yes , what will happen.CT secondary is shorted

 3 6031

what is the function of Droop CT and where it is used?

Lanco,

3 33257

In supply RYB are mentioned. But in transformers, why they are mentioning XYZ?

 3 15491

Can we use all 3 cores of a cable to connect DC motor + ve terminal and similarly one more cable for - ve terminal.

 2 3195

pls define kvarh

 2 5293

What is Grounding? any difference b\w earthing? if yes plz explan??

ABB,

3 6417

What is HVAC, PLS SEND DETAIL OF hvac.

 6 6661

WHAT TYPES OF OIL(STRUCTURE) ARE USED IN POWER TRANSFORMER INSULATION?

 4 5199

why neutral and body earthing of transformers kept separated? what is distance between two is required as per is?

 6 26321

what is the pperating squvance in transmission line for circuit braker, isolater & earthing switch.

 2 3523

what will happen if i connect or change line with phase terminal

 1 2845

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Un-Answered Questions { Electrical Engineering }

Single line diagram for dbb (double bus bar)system.

1463

Differentiate between digital phase converter and ordinary phase converter.

760

plz send me the placement interview question and answers of whizchip(technical and apttitude)..i have an interview in next.

4508

What are factors to be considered while we selecting the Core Balance Current Transformer for Earth fault protection

1427

what is the effect of change in supply frequency on load angle of synchronous motor,all other parameters remaining same?

1897




Draw a SLD of HT distribution EB grid up to users Transformer?

5650

what is the use of commutator in dc motor if we supply ac ? commutator is used to convert ac to dc.and it is used to arrange the flux in unidirectional in case of dc supply. if we give ac as supply to dc motor what is the use of commutator?

1640

WHAT IS AIR GAP VALUE IN MM FOR A 11KV BUSHING OF 11KV/440V DISTRIBUTION TRANSFORMER. AND AIR GAP VALUE OF 25 KV BUSHING OF AT TRANSFORMER OF 25 KV TRACTION. WHAT IS THE CALCULATION FOR THE AIR GAP PERMITTED FOR BUSHINGS AT DIFFERENT VOLTAGES.

3043

plz tell me,ht and lt panel terminals in substations explain beiefly

2335

Is neutral transformer can be called as control transformer?

1522

what is d check in dg 1500kva

1580

Why PS class CT is always preferred for Differential protection?

1083

What is effect of harmonic current (Draw by VFD) on power system/ electrical Equipments ?

1642

Why only sinusoidal ac voltages are generated?why not triangular or sawtooth?

1566

What is mathematical model of a control system?

642

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