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Electrical Engineering Interview Questions
Questions Answers Views Company eMail

what is the difference between high impedance & low impedance

L&T,

1 4693

how to converate kva to kw ?

4 7252

For 300MW and over a distance 250 km, what voltage be selected? and no. of circuit?

DPL, NTPC,

5 8289

can any one suggest me the tilt angle of my solar pannel ?? or tell me how can i know the fix tilt angle of my solar pannel?? my cordinates are 31.503629,72.993164.

1812

What is the criteria for deciding whther fire wall is required between two power transformers

1 4203

Why we have use 3 & 1/2 core cable use for general electrical supply arrangement

1 4041

What happened when the field winding of dc series motor is open?

Bhel,

2 4919

What is the distance b/w R&Y phase in 33kv T.line,11kv &440v

NTPC,

1 9899

how to differentiate a mpcb,mcb with a contactor? Explain their working operation

L&T,

2219

How Can I calculate for the photometrics requirements for a street lighting? Data given are: 45 units of 6 meter light pole with 150 watts metal halide lamp, 220 volts and installed in a promenade area.

2094

what is the function of avr when synchronous generator act as synchronous motor

1 3918

at work i have a genertor/alternater what is the easyest way to work out if it is dc or ac?

1882

why are u join ntpc

NTPC,

2161

why 3 phase is converted into 2 phase using electronics circuit why not 2 phases are diresctly putted from the 3 phase transformer??

Descon,

2187

I have calculated load for an office building which is 1200 KW as all the load is single phase therefore its 1200 kw single phase. Now i have to design Transformer and Generator for this load Please kindly give me exact answer that how much capacity of Three Phase Transformer and Three Phase Generator is required for this load.

3 6253


Post New Electrical Engineering Questions

Un-Answered Questions { Electrical Engineering }

Atwhat condition reverse power relay will act?

2262


I use 20 nos led tube 4feet, in pathway 100mtr approximate, so what size cable i use for lighting

1475


what are the accessories need to be added while doing estimation for the following: 1.MCCB 2.MCB 3.ACB

2098


What is the mmf,rgt and ngt please brief completely

1635


Does outdoor isolator loose connection cause short circuit current in that circuit? if yes then how ??

1700


Control wiring of a dol starter for forward and backward

1581


How to calculate earth wire load by formula

2587


I am abt to give IOCL intrv.Plz sir guide me for IOCL intrvw (Electrical).Which subject to be consider. questions are generally asked from which subject.Plz help me out.

1997


I Have 3 Phase 10 KW AC Alternator i found one phase weak, so what will be the reason & what action shouls i take to rectify the same.

2067


how u select control transformer for a mccb panels or any panels?for expample we hav 440 volts maim supply and control volts is 230v?

2166


Is it possible to measure the voltage of a battery from a single terminal?

1737


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


Igfet is a

1639


If an electrical component has a positive temperature coefficient, how come such components have high power losses due to heat if current decreases when resistance increases? assuming power given by I^2*R whereby the Resistance is infinite.

1077


how will reduce the voltage. if 12volt/250ma transformer toreduce 6 volt

1969