Electrical Engineering Interview Questions
Questions Answers Views Company eMail

what is lowest system voltage?

Apex Holdings,

7 3578

only three phases are coming in step down tranformers.how to get neutral?

5 4607

New istallation how many eathing have one transformer? Names of earthing connect places?

10 20459




a bulb of 100W and anather bulb of 200W , rated supply voltage 230v.when supply voltage is reduced to 100v,which bulb will give more light? and why with calculation?

12 26734

if the diameter of a conductor is 'R' then what is the distance between two bundle conductor in a phase?

NTPC,

1 1729


in single phase we get 220 volt and in three phase 4420 v why this second Ques= in case three phase star conection our neutrul becom disconect what happan 3 Q=== a three phase house load and have unbalce load on different pahse diffrent current eg phase a 7A b 8A c 5A and voltage is 440 than how calculate it total load in kw pl give formula thanks

8 6786

WHAT IS SEMICONDUCTOR? EXPLAIN DETAIL. FOR EXAMPLE TAKE A PENCIL.THE LEAD IS MADE UP OF GRAPHITE IT IS A CONDUCTOR.THE OUTER COVER IS MADE UP OF WOOD IT IS INSULATOR.PENCIL IS A SEMICODUCTOR MATERIAL.

5 10460




what is Aircraft earthing and what does it do?

6 19906

Why is the diffrential protection in DG. What if the CT polarity is reversed while connecting for the same type of protection? How polarity can be made ok?

1 4237

what is corona effect?

Genco, Wipro, ABB,

39 69857

what is CT class? depending upon which it is classified?

Siemens,

3 5291

what is automatic voltage regulator and it is used?

TCS, ACME,

28 40006

what is meant by form factor and hoe related with the HT transmission voltage

2 5432

How to make vector group test of transformer?

2 4859


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Un-Answered Questions { Electrical Engineering }

when the Transmission and Distribution network where is the "feeder" lines are located? and why should be used in T&D network.....

407


Comparision of Air break circuit breaker, SF6 Circuit breaker and vacuum circuit breaker.

1149


Wind mill

461


what is the working principle of energy saver control panel. please give the complete calculation & theory.

953


wheather the size of windings in motor and generator are the same

730






(1)WHAT HAPPENS WHEN SUDDENLY LOAD GIVEN TO THE INDUCTION MOTOR ? (2)CAN WE MAKE WOOD AS MAGNET ? (3)WHAT IS THE VALUE OF MAGNETIC FLUX DENSITY IN TRANSFORMER ? (4)WHY WE ARE USING ELECTROMAGNETI NOT ELECTROSTATIC IN MACHINE ?

857


when we design electrical schemes of 11/.415kv distribution..wen and were should we show the relays??what is the function of it?for example..we place EFR Relay CT between transformer neutral link and transformer earth.Like this what are the other type of relays we should use?why?where?Explain please..Thank you

662


What happened when voltage will half value of current ...

308


advantages and disadvantages of inverse definite minimum time RELAY

17


How many double suspension hardware fittings are required on a double circuit transmission tower?

753


How can we calculate C10 rating of a bttery from c5 or c20 ratings??

3227


What are IP protections used for electrical panels, JB, equipments installed in explosive zones like Petrochemicals, Oil & gas

330


how to calculate IR value of 33KV cable ??

342


what is the internal working of star delta starter

887


How to decide whether A / B / C / D curve type MCB should be used?

1037