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Electrical Engineering Interview Questions

why does spark appears when we swith on the light

3003

what the main difference of the 3 phase and 2 phase power supply??

3830

what is isochronous mod? what is voltage drop mode and p.f mode?

ABB,

2124

what is ic 01,ic 06 ?is it types of cooling?

Bhel,

3145

In 110V DC supply,if a closed circuit gets open, How can we identify the voltage which is measured after the resistor(4KOhm) which is open with negative.it shows 55V +ve when measured, also the actual positive source is 55V +ve .Because there is no voltage drop in open circuit. How can we identify whether this is the voltage which is series with the resistor or the DC source direct +ve.

GE,

2924

what is tesla ?

2543

what is at/cm ?

3000

how to choose the cable size for 100A(is there any formula please update)

10451

how can decide the current rating of oltc

1378

why always out of the 3 phase(RYB) of supply, in Y phase w.r.t the voltage is higher? on R & B phase the voltage will be lower as compared to Y phase?

4308

Installation method of self treated earth electrode.

1026

speed of an electric wave

2523

HOW TO MEASSURED THE AMPS RATING FOR SUITABLE CABLE SIZE?

4386

6.6 KV /.415KV Step down trf. we can get 6.6 KV from primary by applying .415 KV secondary side by same TRF.

5347

how we control automatic generator i'e with to supply (main supply and local generator) when the main supply was break to supply the local supply automatically to begin supplying power.I now this control circuit is the combination of contactor time delay contactor switch and overload relay .but my question is how we combine those component thank you

1048

Un-Answered Questions { Electrical Engineering }

how the aircraft outer body and inner body is separated ?

122

What is meant by stator?

154

what are symmetrical and non symmetrical components in electrical installation.

1146

When we have earthing mesh or underground earthing network in industrial plants, weather we have NT-S or NT-C-S kind of earthing system, so eventually weather we must use 4 or 5 wire in 400 volt level (For example 3×150+70 mm2 or 5×150 mm2) in this connection I would like to know exactly the paragraph of IEC or IEEE number

1212

WANTCONTACT NUMBER & EMAIL/ WEBSITE TO CONTACT THE SECRETARY,MADHYA PRADESH LICENSING BOARD(ELECTRICAL),K- BLOCK,3RD FLOOR,SATPOODA BHAWAN,BHOPAL

1152

Why insulation level follows this order? transformer < bus bar < circuit breaker & Isolator < transmission line.

1157

What is Plank's Law?

195

How wire size can define in electrical wiring? What is the ratio?

1309

1. for eg, capacitor is used for many purposes(it act as filter, oscillator, bypass capacitor, memory storage etc...) 2. Please tell me some example circuits for different uses of capacitor( whenever and whereever and however we used capacitor as a filter, oscillator tuning etc..) 3. similarly for inductor and resistors(it act as what?) and when and how we want to act as like that?, and how we can used these components depends upon our requirments with example circuits and explanation? design to act as these components depends

913

8494

how to flameproof electrical motor on the shaft?

1047

How many methods use the load flow solution?

148

Explain what is Zener diode?

206

PLZ EXPLIN ABOUT CLASS PS CLASS CT .WHY THEY R DESINED AND FOR WHAT PURPOSE?WHY OTHER CT CANT BE USED AS PS CLASS CT? EXPLAIN IN SIMPLE LAUNGAGE IF POSSIBLE PLZ GIVE CIRCIT DIAGRAM?EMAIL-RAJ_SINGH_0376@SIFY.COM

1146

TRANSFORMERS WITH DC SUPPLY

1038