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

Electrical Engineering Interview Questions

Questions Answers Views Company eMail

IF avr is voltage regulator of genset means why we are giving genset CT sense to AVR ?

ABB,

3 6472

what is the use of CurrentTransformer in AVR ?

2 5365

what is the lemen of a single 5mm 13000mcd white led pls reply

Eskom, Sona,

1 4989

how much current does 3ph. 10 hp ac motor draw.

8 53851

Hi Suppose we have a wye/wye transformer which is grounded at both sides,in this situation, do we have ay ground transformer? in other words, ground transformer can do any thing more (while we have nuetral wire in both sides)? As the last question, what about 3rd harmonic? we have two choices: first using wye/delta transformer + ground transformer and second using wye/wye earthed connection.in the former choice, we dont have 3rd harmoonic at the secondary side but what about Yn/yn conection? do we suffer from 3rd harmonic in the Yn/yn connection?

1935

technically, what is the reason behind starting the motor star the delta connection .. and what other ways to do this rather than using " star-delta transformer"

Wipro,

1940

What is the different types of cable & current capacity of cable

1915

what is formula of illumation calculation

2183

what happens when one of the phases out 0f 3 phases been removed under working condition and no load condition will the machine run if so plz send me why

2 4602

why the supply power frequency is 50hz in india? where as it is 60hz in US?

4 8519

How loading get increased in generator not the speed, while we increasing steam to turbine.

2 4591

what is purpose of manual bybass in ups

3 5589

how much current does 3ph a.c & d.c motor drawn.Plz. provide formula with example.

5 6974

Why the earth cable have current 1A - 2A , it is safety for Electrical system or earth cable should be zero amps ? how to troubleshoot?

1990

What do you mean by ACB and VCB?

L&T,

3 12114

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Un-Answered Questions { Electrical Engineering }

what is the principle of operation of tungstun bulb ??

1798

Either the Armoured Earthing strip of HT 3 core cable have to pass through CB CT or not , why ???

2045

What is the difference between multimeter

1926

What is relation between mu(nought) and epsilon(nought)?

1507

What is a differential amplifier?

1203

What is the procedure/activities to be taken to inject the current more than 2000A by using 2000A Loading Transformer?

1974

How to calculate main incomer rating of APFC Panel ? Let's say i want to find main incomer for 11kV, 1000kVAR Panel.

1910

what is basic difference betmeen normal & flame proof motor??

1984

Difference between low impedance and high impedance Restricted Earth Fault

3097

The series field winding has low resistance while the shunt field winding has high resistance. Why?

1692

What is the relationship between voltage,current & frequency?

1739

I have a relay contact rated at 220v dc which is supplied with a 24vdc from the panel,for it to trip the dampers(24vdc).What if the application of the relay changes so that it should work at its rated 220vdc then will it work at 24vdc supply given or any other consideration needs to be taken .....

2045

What do you mean by lighting transformer?

1016

what is the IEC standard for Power Cable installation in onshore (like in direct buried ground or above groung)

2677

by what factor the starting current is used when comparing star and delta connection for motor starting?

2040

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