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Electrical Engineering Interview Questions

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,

5496

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

1784

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,

3950

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

32905

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?

2242

What is function of condenser in fan?

4631

WHAT IS RMU AND WHAT IS ITS FUNCTION AND HOW TODISCONNECT

Bhel,

6011

WHAT IS REACTIVE POWER?

2881

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

3545

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

2785

why transformer ratings are in kva

3646

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

1797

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

2766

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,

2352

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

Bhel,

23523

Un-Answered Questions { Electrical Engineering }

What will be result if we connect LT votage to the terminal of HT motor?

1255

impliment (AB)`+C to transistor representation

814

what is difference between line differential and transformer differential?

745

How to calculat the ratio of HT\LT in energy meter

1151

i have attended the interview on 4th June,08 at Kolkata in IOCL, can anybody tell me what is its result

1098

1.main parts of generator? what is used A-check,B-check,C- check? 2.what is FM200 system in data centers? 3.difference between pac,ahu?

1189

dear all i am kumara now current working in electrical designing of control and relay panel i want learn some substaion design then any book are available. pls mention name and authour

1064

Give atleast 20 alternating current apparatus and devices.

755

why it is so called as xlpe(cross linked poly ethyline) cable?

1148

List out the different frequency domain specifications?

167

Why do we use center tap transformer that used with portable tools

1316

Is it required to use Automatic transfer Switch in L&T panel board if we use AMF panel with DG set? How the single line diagram will be? Please forward the material to sreenu_207@yahoo.co.in

3662

what is through fault?

1222

how to compute kvar in substation feeder to improve power factor and sending voltage

1201

what are the advantages and disadvantages of speed control of 3 phase induction motor by varying frequency explain with drawing

1495