Electrical Engineering Interview Questions
Questions Answers Views Company eMail

how to design coil turns ?

L&T,

782

how to calculate magnetic force genrated by a coil ?

L&T,

989

what is method of dc current measurement

5 5494




How much energy save vfd if motor run on 50 Hz (full speed)

Reliance,

3 2633

How to Decide(calculate) Bush bar size for copper and aluminiam ?

Essar,

1006

why knee point voltage should be high in Ct for differential protection

NTPC,

1 3811

what are the difference between protection class CT and Class PS CT

13 24038

WHAT IS DC COMPONENT IN CIRCUIT BREAKER?

10 16045




How to calculate HT XLPE CABLE for 11 kv / 433 v , 1500 kva oil type transformer system? plz provide step by step calculation

Sitara Energy, Engineers India, Polycab, Sonali Bank, Shashwat, Indian Railways,

13 97822

Hi friends. m 3 years drop. now d company asks in d interview d reason 4 my drop.what shud b d probable answers 4 that which may not put a negative impression.

2 2588

why we use star connection on the primary side of a transformer?

DRDO, TCE,

5 12311

what is meant by a slip?

10 8517

why transformer is conneted to dc for polarity test.it doesnt work in dc?

ABB, KVPY,

1 5168

What differance between Circuit brekar and Isolater?

TATA,

14 13827

WHY HUMMING SOUND OCCURED IN HT TRANSMMISSION LINES?

6 6976


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Un-Answered Questions { Electrical Engineering }

In Power cable specification what is U0/U and Um.

2127


What are the different towers used in 132kv transmission line? what are the differences between the P,R,S towers used in 132KV and detailed explanation

787


what is the relation between size of the anteena and wavelenghth of radiated wave

979


If ROC does not lies inside unit circle,then ? a) Fourier transform converges b) Z transform converges c) Hatly transform converges d) Colpit Transform converges.

697


why magnetising curve not start with zero voltage?

975






what is the working process of over & under voltage relay.

881


What happent when a AC motor(no break and starters ) stop and suddenly start . ? Starting current low or high?? Why?

315


what is the earth current,reverse power,electrical trip generator short circuit,low voltage, high voltage please discribe me

943


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

728


wish of these transformer uses oil?

514


what is difference between 9kv 5ka surge arrester and 9kv 10ka surge arrester.

574


advantages and disadvantages of inverse definite minimum time RELAY

173


How to findout raw or ups power? its not indicated in socket,

851


Why Stabilising Resistor used in REF circuit ?

1855


can I improve the furnace power factor (10 mva transformer) by adding a capacitor bank before the transformer.Does system power factor vary a lot with the furnace PF?

773