Electrical Engineering Interview Questions, Answers for Freshers and Experienced asked in various Company Job Interviews

Electrical Engineering Interview Questions

Questions Answers Views Company eMail

132 KV TRFO BUSHING CT BURNT WHEN A 6.6KV HAS BEEN APPLIED TO IT .WHY .ANY REASON ?

vguard,

3 7490

why is only third harmonics is dangerous for electrical equipments?

3 11921

what is the contact resistance of sf6 circuit breaker??

2 7820

what is the contact resistance of vacume circuit breaker??

1 4023

what is the contact resistance of Air circuit breaker??

1 4705

How check proper electrical earthing of machine.

DRJ ARDE,

5 16957

How check electrical motor winding.

DRJ ARDE,

4 10203

BRIEF ME CHECKING PRCEDURE OF BATTERY 12V 26AH

DRJ ARDE,

1 4216

are induction motor have poles? yes / no , why?

3 5493

how open delta PT works & what is its construction?

2209

is there any device that works properly accept relay, it may be fuse but if i want fuse of 33kv 300 amp it is avaliable, pls give me details

1952

what is the use of Reactive power in power system?

3 9696

What is the comparision (advantages / disadvantages) of 110V, 60 Hz system to 230 V, 50 Hz system.

2 8673

A dc motor running on dc drive whose input is 3ph AC what will happen if we change the phase sequence of dc drive for e.g (R Y B) is connect as R B Y, will the motor run as same as previously running before changing phase without any effect

4 8699

Why corona leads to production of Ozone and glow of the color VOILET?

1942

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Un-Answered Questions { Electrical Engineering }

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

3040

I am having a 42KW 3 phase electrical heating furnace, heating element is 80/20 nichrome material, my connections is made in such a way that 2 star connection compromising 2 coils per phase so totally 12 coils, shall if i use it unbalanced star condition (instead of 2 group of 3 phase or 1 group of 3 phase, connecting 4 phases of 5 phases) what will be the consequences and is it acceptable?

1646

For a 6.6kV Motor it is recommended to do megger test with 500 V d.c and not more than 5kV d.c but the Hi voltage withstand test should be performed by 12kV AC. Why the dc voltage test should be limited but AC voltage withstand test could be with such a high voltage?

2298

what is a vector protection in transformer

1983

How we can calculate the life of Lead acid battery

1742

What is the ratio of true power to apparent power in an ac circuit?

1105

What is the formula to calculate the rating of a three phase miniature circuit breaker

2097

What are the advantages of a three-phase system over a single-phase system?

1076

why booster transformer is used in sumpners test conducted on transformer????

3540

a simple c++ program to calculate simple interst with its data members as private

1827

what is the calculation method to design core and winding of a 200kva 3phase distribution transformer?

2358

what is the difference between Power and Distribution transformers ?

2108

what topics we have to concentrate for power grid et.written test.and tell what to read for english synonyms and antonyms.

1909

WHY THE COLOR OF OUTDOOR TRANSFORMER IS BLUE ONLY???

2078

Advantages/Disadvantages of earthing of neutral bus on MSB instead of separate neutral earthing for transformer/DG sets feeding to MSB

2748

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