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Electrical Engineering Interview Questions
Questions Answers Views Company eMail

What is Grounding?

 2 3996

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

 2 4676

What are the types of circuit breakers ?

Genco, Super Max,

6 5813

Merits & Demarits of Oil circuit & Air circuit breakers ?

Genco,

1433

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 5539

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

Lanco,

3 32191

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

 3 14670

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

 2 2912

pls define kvarh

 2 4875

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

ABB,

3 5781

What is HVAC, PLS SEND DETAIL OF hvac.

 6 5811

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

 4 4681

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

 6 24133

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

 2 3043

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

 1 2606

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Un-Answered Questions { Electrical Engineering }

Define peak time.

474

What is called limb of a transformer?

441

I have been using an 600VA with 0.6 p.f UPS with my desktop which has 450W power supply unit. Can anyone explain how can this happen . Because the output of the UPS is 360W (600*0.6) (<450W)

1505

What is the role of Dedicated earthing in UPS System?

2392

2- What are the percentages between excitation currents in phase (R, S and T) in ∆ and Ỵ connections in excitation Current test in transformers?

1401




how we can explain arc heatng?

1295

could an induction motor be used for regenerative braking in electric-train control? in this type of application would some scheme have to be devised to obtain low synchronous speeds while braking? would induction-motor drive, therefore, be suitable for passenger service?

1416

What are the internal and external faults?

442

What is the difference in calculating size of AC cables compared to calculating size of DC Cables? Usually DC Cables are larger than AC Cables although they have the same ampacity. Why is it?

1352

How to calculate mf when meter equipment and meter are connected

1110

The advantages of Magnetic flux leakage technique over Ultrasonic technique for non distructive testing of material.

1323

Consider three heater bank connected in 3 phase star with neutral.Each heater bank connected in each phase.So each phase get 230 volts supply.my question is,during balance condition, current flow in neutral or Not

1020

After doubling voltage from solar cells & use step down voltage transformer can we get high current output with low voltage.

1318

i installed 100kva ups. what KVA genset they should provid in input side? plz any update formula or ans with reason.

1617

what is lumped and distributed elements?

1354

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