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

Electrical Engineering Interview Questions

Questions Answers Views Company eMail

The formular of how to calculate a cross sectional cable to feed an electric motor. Examle: 15KW, 26.1A, 415V. Calculate the cable size in mm2

Sona,

3 7890

Can you explain the phase displacement between primary and secondary of power transformer of any vector group(for ex)?

1 3222

I have two power supply.a)govt. power b)Captive power.3 phase load connected inside factory.when source change govt. source to captive some motor rotate reverse. Is phase sequence changes when if off & on?If I off generator & on it again is it possible to get changed phase sequence??

ABB,

4 6695

what is the relationship between current and frequency in AC circuit?

3 40457

if i have one capacitor=80 micro farad which correct the unity power factor,but i want to make capacitor bank who correct the power factor.so,how to split this capacitance value?

2 4385

What is function of condenser in fan?

3 8563

WHAT IS RMU AND WHAT IS ITS FUNCTION AND HOW TODISCONNECT

Bhel,

3 8502

WHAT IS REACTIVE POWER?

2 5453

In the diesel generator wihch type of power we can get it ? Like AC / DC

Aditya Birla, Indian Steel, PTPS,

2 5689

in breather of transformer how sillicon gel absorb the moisture?wat happen when the moisture in that oil?

1 4171

why transformer ratings are in kva

4 6602

What are all the points to be checked while decanting diesel from tanker lorry to HSD YARD

Cisco,

1 3875

What are all the points to be checked for a newly re-winded motor before installation

Cisco,

1 4385

sail kaott diploma ece ke interviw me qus.kis parkar ke aate hai aur G.S me kya puchate hai kya sameedyaan me kis parkar ke qu.puchate hai

Sail,

3444

What motor is used in ceiling fans and what motor is used in table fan.? why table fan is costlier than ceiling fan?

Bhel,

6 28760

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Un-Answered Questions { Electrical Engineering }

What is force on a conductor in a magnetic field ?

1085

Explain (in simple ) - root mean square. whats its role in electrical fundamandal.where its used

2401

sir i completed apprentice in TNEB.apprentice is eligible for 'c' licence

2172

in wind mill use 2100 kw asychronous generator ( induction generator ) rotor voltage : 3300,stator voltage : 690, rpm : 1511 type : MRL063E04 ' we check rotor resistance magger value found following. R-EARTH - 00 M.OHM,Y-EARTH-34 M.OHM,B-EARTH- 33M.OHM R-Y: 31 M.OHM, Y-B: 00 M.OHM,B-R :33 M.OHM HOW CAN I TAKE DECISION?pls ans. quickly

2309

in cvt,there are two windings,1a,1n and 2a,2n.in my one project i use only one winding i.e.1a,1n. the other winding is not in use, so i connect it in open delta and want to close it by ibsertibg thermal resistor. the output of cvt is 132kv/115/sqrt3. plesae tell me exact value of resistor, so i may close it to avoid the resonance phenomenin. send me answer on this email adress please. aetcon-po@aetcon.com

2854

How to calculate the multiplying factor for energy meter with ct ratio given

2032

What is the difference between relays and contactor construction wise?

2258

What are the site acceptance tests for power cables, DG Sets, LT panels & 30kVA UPS ?

2399

Why you are switching off arc protection mcb when you are taking shutdown for lv board.

1702

Why use the vcb at high transmission system ? Why can’t use acb?

1328

Difference between Lugs and Thimbles

15215

How to know about the rating(voltage and other) of induction motor if its name plate is missing at the manufacturing site.

3387

What are the advantage of free wheeling diode in a full wave rectifier?

1133

Why is the frequency not changed during transformation of electrical energy in a transformer?

1408

How much load can take a 16 mm aluminum cable 3 phase

1752

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