Electrical Engineering Interview Questions

how to find number of run cable laying[LT side] for transformer & alternator secondary side? [above condition for getting output power transformer to main panel side] give the example.

L&T,

835

what is the concept of directional power?

648

how to check a transformer insulation?

4064

WHY WE GENERATE 3 PHASE POWER ONLY AND NOT 4 OR 5 OR 6 PHASE??? PLS REPLY.

4597

What is the difference between 11kv/110v & 33kv/110v ? If both 11 & 33KV give 110v then what is the diiference ?

11903

PLS MENTION QUESTIONS ASKED IN IOCL INTERVIEW FOR ELECTRICAL EGG??

1147

For fixed primary voltage how does secondary terminal voltage of a transformer change if the pf of inductive load is raised from 0.7 to 0.9 with load current remaining fixed ?

GATE,

1938

is there any current and voltage drop on liquid resistance starter water/soda tank ?

690

while starting a liquid starter ,is there any volage drop on water/soda on tank.can we touch the tank on starting?

649

what is the speed of the darkness?

2056

what is the electrical?

852

working principle of oil startar

615

what is the difference between mho characteristics and quadrilateral chara in distance protection

4721

WHAT IS THE DIFFERENCE BETWEEN NEUTRAL AND EARTHING

3796

for a 400kv t/m line with 10 ampere current will corona occur?

950

Un-Answered Questions { Electrical Engineering }

Why can't we take NO LOAD TRIAL of motors having V1 mounting??

678

if negative of DC supply used and positive is grounded through EGB, and if ELCB used in the system then is it sense the positive volatge and get tripped is it possible?

366

current transformer balance the power level on both sides. e.g in case of step up, at secondary side voltage rise but current decrease and vice versa in case of step down transformer. but how this power level remains same in case of current transformer and voltage transformer

392

why does the magnetic balance tests at transformer?

624

733

What is shutdown of electrical sub station?

1074

how to failure indution motor insulation & how to improve heat in motor insulation

555

what is the purpose of high speed earth switch in gas insulated substat

1632

How many devices can be connected in one zone of FACP

1001

can we use engine degreaser for electrical motors?

312

Is neutral transformer can be called as control transformer?

697

tan delta equation test on alternators

846

what is effect of length of air gap on performance of dc motor and generator?

485

I am using submission of two ct in one and half scheme for 67/67N protection. Both CTs star point is grounded separately near ct box.Will two point ground give wrong tripping to 67/67N during fault or no matter.

819

At light load transformer efficiency is less because A secondary output is low B transformer losses are high C fixed loss is high compared to output D copper loss is small

2295