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Electrical Engineering Interview Questions
Questions Answers Views Company eMail

Multimeter show phase to neutral volt 230 the per phase but phase to phase 415 not show 460 why.

Intas,

1 5105

What happens if we run alternator on under frequency? 

SRHHL,

1641

What is the reason that the humming sound is coming from the induction furnace panel?

SKS Microfinance,

2080

40 HP motor how many square mm size wire use for stator to motor & aluminium wire use ?

SSPL,

1 3689

Why capacitor is blow when I am starting motor ?

 1 3650

What is ignitor and why it is use in Hpmv lamp ?

 2 7770

What mean power grid fail. why power grid fail.

Intas, Tech Mahindra,

1 5003

Can anyone please provide me details of MCCB/Contactor/SFU rating calculations for a motor feeder..for example 50 kw.. not from type-2 cordination chart. i want manual calculations..

 2101

lenz law application and define

 2221

If we have use two power cable for incomer, that time how many use cbct for earth leakage protection? 1 or 2 if 1 way? If 2 way?

REM Electromech Pvt Ltd,

1643

how does grading rings & spacers in transmission line works? Working Principle?

 1598

why Square root 3 used for three phase?

 2 5296

How Grading Rings & spacers in transmission lines works?working principle?

 1 3801

how is calculated the quantity of weight in hot test xlpe?

Hirbodan,

2006

I have 3 1000 kva single phase transformers and I wish to replace them with one three phase transformer. What is he kva rating of the new three phase, is it 1000 kva also or 3000 kva.

Central Moloney,

5 7023

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Un-Answered Questions { Electrical Engineering }

What are gain margin and phase margin?

833

how to increase senstivity of ct

1926

Pls Breifly explain about UPS (Inverter,Reserve,Rectifier,Float voltage,Boost voltage).

2305

what is the voltage rating of chiller unit sensors

2298

why we use circuit breakers for switching instead of normal switching device?

1422




why incomer bay is required before transformer bay if there are more than 1 nos. of transformer bay.

2624

Is there any standard guidelines/Criteria to design NGR/NGT.?

2366

what is the write prosidure of stringing of 8meter pcc pole.

1978

WHaT IS THE CONCEPT OF INDUCTION LAMPS IN MODERN LIGHTINGS, and HOW IT WORKS TO EMIT LIGHT ( AS NO ELECTRODES ARE PRESENT ) ?" COULD INDUCTION LAMPS CAUSE INTERFERENCE WITH COMUNICATIONS INTO A STORE USING INDUCTION LIGHTING ? WHAT IS THE BENEFIT OF USING THE LOW FREQENCY INDUCTION LAMP , VERSUS LED , AND VERSUS FLUORESCENT, AND VERSUS ANOTHER KIND OF LIGHTING . THANK yOU MOISES GUINDI

1648

why does make gain margin and phase margin on same plot.?

1637

How to discuss the phase shift of transformer considering open delta?

967

A 3-phase IM is supplied from 50 Hz system. It runs at speed of 1440 rpm and slip equal to 4 %. Calculate number of pole pairs. A 1 B 6 C 2 D 3

1582

two way ckt diagram can be drawn by how many ways? give diagram

1343

i need to give section engineer (electrical engineer) for RRB. Please suggest some book

1456

my b-tech percentage is 50%. what answer will satisfy the hr ?

1629

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