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Electrical Engineering Interview Questions

What is the use of choke in tube light?

8343

What is Creepage distance?

2591

the site measured knee point voltage of protection class CTs should be greater than rated knee point voltage? what about meetering class CTs. Should it be below the rated knee point voltage?

1468

transformer spections :: input voltage 0-110-230v; output volage 0-10-12-14v; amp=3A using CRNO CORE, capcaity=50VA primary turns = ? ; secondry turns =?

Bhel,

1439

1. transformer design formula ? 2. how to calculate the primary turns and secondry turns ? 3. core types ? 4. how to find the primary current and secondry current ? 5. how to calculate the stacking factor ? 6. range of fulx density ?

9762

why only violet glow appears in corona effect?

4304

can any one explain me the where is the use of plc and scada

4139

What are Contactors? How they works and what its highest rating?

1347

I HAVE A 1 MVA TRANSFORMER, I WANT TO KNOW THE FAULT LEVEL OF THE SYSTEM ( WHAT IS FAULT LEVEL PLEASE EXPLAIN WITH EXAMPLE)

21031

could any one explain me what power factor and where it is use ful

3761

i need the details about bhel exam.how to apply for that.please send to my email-id.thenmozhi2k7@gmail.com

1370

WHAT IS TANK CKT.?

6076

HOW MANY TYPES OF FUSE?

1459

what is the purpose of vector group in a transformer ? if 2 tranaformers r connected in parallel the vector group is same or not? for parallel operation 2 transformers of different manufacturers maintain same vector group or not?

12202

what is the main purpose of line PT and bus PT?

L&T,

63698

Un-Answered Questions { Electrical Engineering }

Why colled 440V to 3-phase supply.

1501

our factory is going under construction mean time transformer 1000 kva 2 nos &load break swithch 12 kv & 4 nos 750 kva 2 nos & 380 kva 2 nos generator to be errcted.how to arrange earth pits &how to earth connect & neutral pit how to calculate in earth bit size.

1497

what are the problems that generally occur in power flows??

2274

boiler is running in rankine cycle and deisel generator is....?

1396

What is meant by Low Resistance Cable and High Resistance Cable.

1261

What is mean by STUB protection?

1421

33kv substation lay out details & line to line & line to earth measurements

2014

whate is the meaning of balance/unbalance,in stabilizers type

1481

what are symmetrical and non symmetrical components in electrical installation.

1433

WHY RATING OF VCB NOT LESS THAN 630A

1784

HOW CAN WE DECIDE THE SUPPLY VOLTAGE FOR MOTOR ACCORDING TO ITS RATING(IF ANYONE KNOWS GIVE IT WITH EXAMPLE AND ITS CALCULATIONS)

1364

What is the different between digital phase converter and ordinary phase converter?

487

What is the BS(British Standard)code for 11kv motor

3950

1.4 What is meant by CT knee point voltage and how would you determine it

936

Define damping ratio.

552