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

Electrical Engineering Interview Questions

Questions Answers Views Company eMail

What is different bewteen low or high impedance busbar protection scheme

4118

Transformer Secondary maximum current (max. load)

3 7548

why the generator will take 8 to 12 hours to start after it got interrupted due to technical problems in case of power plants.

NTPC,

1 4218

Can we put 3 layers of cable tray while installing tray

NTPC, Siemens,

2398

pre arcing time of ehv breaker

2129

use of PIR in ehv breaker

2165

how ct burden,magnetising current,ratio and knee point voltage are related & derived

Dalkia, SCT,

2196

when current lags behind voltage how does it affect the circuit.In other words what is the significance of lagging current?

3 7349

how much Watt can we fully load a transformer

4 8075

What is the function of Igniter in 250 watt HPMV street light?

1 8727

how much amps will get from a 360/11kv line

2 4587

what is the MNA in case of d.c. machin? whaty is the importance of it? hoe it affect the brush position?

TATA,

2 7322

I have one ct of ratio 3000-2000/1 Amp its knee point voltage mentioned on name plate is 500-333/30mA-50mA at Vk/2. in secondary box there is three terminal named 1S1, 1S2, 1S3 then on which terminal obtained the knee point voltage ie 1S1-1S2 OR 1S1-1S3 & also specify the knee point voltage for the ratio 3000 from name plate.

2450

what is the meaning of stub protection?

1 5753

whatis knee point ?

L&T, Siemens,

5 10830

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Un-Answered Questions { Electrical Engineering }

our industries ht line so power fluctation(once drop of power please rectify causes

2255

What is the use of mc( moving coil) in dc voltmeter and dc ammter and what is the use of ( moving iron)in ac voltmeter nd ac ammeter

2888

any one guide me to reduce the power factor of diesel Generator from 0.97 Leg to 0.8 Leg.with out any change in my load.

1674

brief notes on ammeters

2042

What is Traction? 1KVA Alternator, How much urrent taken?

2123

1))why we run three phase or three different circuit from a single conduit 2)) why not two circuit of different phase run in same conduit?? and why we run same three cicuit of same phae run in single conduit??

2557

Is there possible to Test Transformer for Overfluxing Capability. Or is there any firm who does Overfluxing Test on Transformer?

3098

What is the difference between UPS & inverter ? which UPS is better and whos got the edge ? what is the difference between & inverter ? which UPS is better and whos got the edge 12 V , 24 V , 36 V etc what are the advantages of 12 V, 24 V , 36 V etc and what are the disadvantages of 12 V, 24 V, 36 V etc thanks

1906

we use 400/5A ct and 35/roor3KV,/0.1/root3KV,0.1/root3KV pt ratio. What is the multiple factor of this meter.

2009

How earthing/grounding done in aeroplanes and ships.

3619

he compression ratio for a petrol engine generally lies between

1292

what is the use of power transformer in GSS.

2490

Difference between a pilot wire and a normal conductor?

2044

Why two phase welding machine is used instead of three phase welding machine.

1924

how can you size an automatic voltage regulator?

2354

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