Electrical Engineering Interview Questions
Questions Answers Views Company eMail

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 ?


1 938

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 6467

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 53933

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

1 881

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 2180

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 9472

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 13190

What is the difference b/w Earthing and Grounding?

4 4799

why dc current is supplied in america rather than ac

1 3141

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

1 774

why 3 phase is preferred than 1 phase?


4 11298

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

Power Grid,

2 3138

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 8797

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Un-Answered Questions { Electrical Engineering }

whats the application of voltage regulation? and whats the voltage regulation's device?


what is the difference between single ratio, multiple core and multiple ratio, multiple core ? please explain.


How to do cable sizing calculation for 750 A Neutral Earthing resistor for 33kv. the 33kv cable going to swbd. is 630mm2 3 runs.


What are the advantages of using distance protection schemes as opposed to normal overcurrent/ earth fault protection on high voltage feeders.


What is George phenomena to start the synchronus machine?


How can we findout the maximum efficiancy of Transformer? At which load?


how to flameproof electrical motor on the shaft?


In MEP Services what are parts of STP and what are there function?


how to convert lv line to hv line and viseversa, any losses will occur during this process




Any Electrical Engineering jobs?Please refer for interviews. Thank you


how calculated Transformer losses.


We have a distribution transformer of 750KVA/11kv/440v and an AVR (Servo Stabilizer) of 750KVA on the LT side of distribution transformer. Also we have an ACB of 1200A on the output of distribution transformer (that is on the input of AVR). We want to have an MCCB on the output of AVR. What should be the rating?


What is the Temperature to be set in Thermostat provided in Marshalling box of the Transformer / Motor.


What is the formula for calculating impedance of transformers connected parallel at fault level 50KA?