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Electrical Engineering Interview Questions

WHY WE USE CABLE JUNCTION AFTER BETWEEN TANSMISSION LINE AND TRANSFORMER

L&T,

1765

How to design CT for connected with Transformer OLTC operation? normally CT output design for 1A/5A range but during OLTC Tap position changing time how to function the CT?

HEG,

1735

what parameters are should nessary for control technic dc drive(in rolling mills)?

TATA,

1025

KMSC,

8480

What is Fan Coil Unit . How can we calculate CFM .

17738

Star Delta Diagram with full description

1385

What is Fire Panel ? How it works ?

1093

how to caculate cable size for given amperes

RVNL,

4983

what are the reasons of low voltage during start the DG?

2735

why we test the core balance of the transformer?

2734

why we test the core balance of the transformer?

3568

why we condut tan delta test i want brief explain?

6849

how to calculate the ct burden?

6039

how is motorized megger operate?

4952

It is being often experienced that due to single phasing fault of any source transmission line of any closed loop synchronized circuit all the power transformers with primary stared trips but the power transformer with primary delta wont, why ?

MSEB,

2787

Un-Answered Questions { Electrical Engineering }

WHAT IS SPEC OF CLEANROOM MOTOR AND LIGHT FITTINGS?

1332

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

2029

generally in LT and MV motors we are using 3.5Coresx16,25,35,50 etc cable for supply.although motors is earthed at two point and having all protection.then why we are using that 1/2 core for earthing the motors.while in HT cable we are using only 3core cable for motor supply.generally lt and mv motors are delta connected and ht motors having star connection.whethere it is having any relation with winding connection( star or delta).all motors i am talking about are dol only.can anybody solve my confusion.thanks...

1061

could anybody able 2 send me jindal steels previous papers fr electrical steam....pls send 2 my id if possible....sirisha.shaik@gmail.com

1094

Instrument connected to a single phase supply

725

Explain what is Zener diode?

201

why power factor is important?

6239

Swg formulae

1040

excitation limit of an excitor

1058

how we can calculate power factor in single phase & three phase ?thank u

1123

what is residuel magnetism. and how order lead acid batteries for 24 volt. emergency lighting system.

1097

operation of protection relay watchdog contact?

1412

Explain Random and Deterministic signals?

826

What is a copper loss or i2r loss pc?

179

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.

1364