Electrical Engineering Interview Questions
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How one can say about a device (e.g: a light holder contains 20 or 30 L.E.Ds which glows when power supply is off, from which source they are getting the supply..... battery or capacitor) without removing and opening up its case ?


1 897

How one can check the charger of the mobile phone or any other charger .......... that is it working ? if , working is it delivering the required supply which is needed by the battery to charge properly ?

4 6369

although ckt breakers have taken the place of old fuse. But instead of it , these older ones are still used in the industries and homes ? why .... what are their advantages and disadvantages ? which one is leading and winning the race and competition ?


which type of A.C motor is used in the fan (ceiling fan, exhaust fan, padestal fan, bracket fan etc) which are find in the houses ?


25 53394

what are fluorescent lamps (fluorescent fixtures) & what are incandescen lamps (incandescents fixtures) ? differences between these two ?

1 797

how one can know the charging time, discharging time of a 12 VDC battery ? If i have a battery of 12 VDC , 4.0 AH , how long will it take to charge from a charger (power supply) of input 220 V , Output 15 V and output current of 3000 mA and how long will it take to discharge whether using or not ? How much backup will it give ?


1 2121

if we want to increase the back up time of an UPS what should we do ? if we want to decrease the charging time of a battery/batteries attached with the UPS what should we do ?

6 9253

what are the differences between 'exhaust fan', 'heavy-duty exhaust fan' & 'super heavy duty exhaust fan'. what are their power ratings ?



whats the one main difference between UPS & inverter ? And electrical engineering & electronics engineering ?

16 12861

What is the difference b/w Earthing and Grounding?

4 4691

why dc current is supplied in america rather than ac

1 3082

can any one suggest websites having study maetrials for the electrical students?

1 725

why 3 phase is preferred than 1 phase?


4 11139

what is the order of mgnetiation current in a current transformer of 1000A/1A ratio?

Power Grid,

2 3091

generally on the roadside v hav 11kv line which is being step down to 440v line to line....so any1 can tell me which type of transformer they r using whether it is star to delta,delta to star etc...???

Core Solutions,

9 8655

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Un-Answered Questions { Electrical Engineering }

. How to calculate the Short Circuit Impedance in Transformer? How to calculate the Short Circuit Impedance in Transformer?


what is the responsibility of C license holder in industry?


Why the earth to phase voltage is high 250 compare to other two phases


I have 2 KW electric water heater.I am gonna use it in controlling water temp.so I needed to increase or decrease the heating capacity.is there any electrical-electronic circuit for varying the resistance & so current?


R=*ΒΆ l/a


3 phase induction motor connection star or delta while using ac drive motor is .75 to 5.5 kw


What is the rating of a circuit breaker needed for 300 kv load in 33KV supply line of 33/415 transformer ? Whether 800/1200 amp vaccum circuit breaker can perform for a 33 KV line in input in 415 volt in output of the transformer ?


what is the difference betweem star connected motor & delta connected motor?


Draw the line diagram of diffretial relay connected to transformer?


what is a bus riser in power system and why it is used


How to apply 'c' license and also explain what is difference between 'c' and 'b'license.i am also working in one of the private company.i have finished my diploma in 2014 .i have already finished in ITI electrician course.....


How can we decide cable size from HT panel to Transformer? Please give you reply with some examples.


what is the best method of grounding in 30 MW generator?


X/R ratio in 11kv transmission line is?


Could Please Explain briefly. Why used stabilizing resistance series with High impedance bus differential protection relay.