Electrical interview questions with answers

Questions with answers

If u want to see more questions with answers visit the site http://www.electricalinterviewquestions4u.blogspot.com/

Q:what is electric traction?
A:Traction means using the electric power for traction system i.e. for railways,trams, trolleys etc. electric traction means use of the electricity for all these . now a days, magnetic traction is also used for bullet trains. basically dc motors areused for electric traction systems.

Q:How can you start-up the 40w tube lite with 230v AC/DC without using any choke/Coil?
A:It's possible by means of Electronic choke.otherwise it's not possible to ionise the particles in tube. light, with normal voltage.

Q:what is "pu" in electrical engg?
A:Pu stands for per unit and this will be used in power system single line diagram there it is like a huge electrical circuit with no of componenets (generators, transformers, loads) with different ratings (in MVA and KV). To bring all the ratings into common platform we use pu concept in which, in general largest MVA and KV ratings of thecomponent is considered as base values, then all other component ratings will get back into this basis.Those values are called as pu values. (p.u=actual value/base value).

Q:Operation carried out in Thermal power station?
A:The water is obtained in the boiler and the coal is burnt so that steam is obtained this steam is allowed to hit the turbine , the turbine which is coupled with the generator generates the electricity

Q:why link is provided in neutral of an ac circuit and fuse in phase of ac circuit?
A:Link is provided at a Neutral common point in the circuit from which various connection are taken for the individual control circuit and so it is given in a link form to withstand high Amps. But in the case of Fuse in the Phase of AC circuit it is designed such that the fuse rating is calculated for the particular circuit (i.e load) only.So if any malfunction happen the fuse connected in the particular control circuit alone will blow off.

Q: what is the diff. btwn. electronic regulator and ordinary rheostat regulator for fans?
A:The difference between the electroic and ordinary regulator is that in electronic reg. power losses are lessi.e.for as we decrese the speed the electronic reg. give the power needed for that perticular speed but in case of ordinary rh type reg. the power wastage is same for every speed and no power is saved.In electronic regulator triac is employed for speed cntrl.by varying the firing angle speed is controled but inrheostatic ctrl resistance is decreased by steps to achieve speed control.

(Tips to bloggers:keyword density is more important in search engine ranking)
Q:How tubelight circuit is connected and how it works?
A:A choke is connected in one end of the tube light and a starter is in series with the circuit. When supply is provided the starter will intrupt the supply intermittant cycle of AC. Due to the sudden change of supply the chock will generate around 1000volts . This volt will capable of to break the electrons inside the tube to make elctrone flow. once the current passess through the tube the starter circuit will be out of part. now there is no change of supply causes choke voltage normalised and act as minimise the current.

Q:what's is MARX CIRCUIT?
A:It is used with generators for charging a number of capacitor in parallel and discharging them in series.It is used when voltage required for testing is higher than the available.

Q:What is encoder, how it function?
A:An encoder is a device used to change a signal (such as a bitstream) or data into a code. The code may serve any of a number of purposes such as compressing information for transmission or storage, encrypting or adding redundancies to the input code, or translating from one code to another. This is usually done by means of a programmed algorithm,especially if any part is digital, while most analog encoding is done with analog circuitry.

Q:What are the advantages of speed control using thyrister?
A:Advantages :1. Fast Switching Characterestics than Mosfet, BJT, IGBT 2. Low cost 3. Higher Accuract.

Q:Why Human body feel Electric shock ?? n in an Electric train during running , We didn't feel any Shock ? why?
A:Unfortunately our body is a pretty good conductor of electricity, The golden rule is Current takes the lowest resistant path if you have insulation to our feet as the circuit is not complete (wearing rubber footwear which doing some repairs is advisable as our footwear is a high resistance path not much current flows through our body).The electric train is well insulated from its electrical system.

Q:what is the principle of motor?
A:Whenever a current carying conductor is placed in a magnetic field it produce turning or twisting movemnt is called as torque.

Comments 90 comments

Muhammad Arsalan Ilyas 6 years ago

I can only say a word which is thanks!

nice effort.

shwetha 5 years ago

thanks..good information i got from this site

pankaj 5 years ago

thanks,this is one of d best site for preparing interview

darshini 5 years ago

thanks...........it will be very useful for interview

XYZ 5 years ago


mukesh 5 years ago


vini 5 years ago


perane nitin 5 years ago


munna 5 years ago

thanks good question

dinesh 5 years ago

important ques...thanx

Vasudevpatel 5 years ago

Best choice of me

baskaran.s 5 years ago

it usful to develop electrical skill.

arunkumar 5 years ago

good answer

kamaraj 5 years ago

thanks for info....

aravinthraj 5 years ago

it 's help to good job on our future

then used to no fear in interview

usman 5 years ago

bakwas ache question rakho yar

sravs 5 years ago

its usefull 2 every one

farhad 5 years ago

this is very good site to improve knowlage

Rajesh 5 years ago

thanks i got good knowaldge from this site

Adhavan 5 years ago

Can do anythng

vaishnavi 5 years ago

very informative

Amin 5 years ago

Nice 1 thanks

Niks 5 years ago


Madhan 5 years ago

Thalaiva engala asirvatham pannunga

aamir 5 years ago

not a great work ,there are many other sites better than this which are more informative and brain teasing too. But thanx hey

LETLAWA 5 years ago


kumaresan 5 years ago

give me more...

Kannan 4 years ago


rajesh 4 years ago


bala 4 years ago

very usefull information.. keep it up..

abhishek 4 years ago

its good

john fax 4 years ago

it helped me a lot but i m not an electrician just going to interview for being inside the samancor programme to teach us about that occupation.

Thangaraj 4 years ago


didar 4 years ago

really informative

saiful 4 years ago



Zaheed afsar 4 years ago

Please increase the quantity of questions

karimulla 4 years ago

Thanks you

Harry 4 years ago

Information is excellent but please increase number of questions which help for career of persons..

And at last i can only say Thanks for the information

thabang arthur mangena 4 years ago

tanx a lot 4 the info...hup it's gna hlp me 2morw

srinu 4 years ago

Good information thisquestions and answers

kiran 4 years ago

thokkala vunnai

KRITHI HEGDE D 4 years ago


periyasamy 4 years ago

this is used to improve my efficiency.... HEARTFELT THANKS

pandu its ruler 4 years ago

very g inf t u...

kriba 4 years ago

thank u..for your best information.i hope it will be helpful to me in some time.

kumar 4 years ago

thanks for given best material...............

muhammad basharat 4 years ago

please send me electrical questions send me on my e-mail id my id is muhammadbasharat85@yahoo.com

smart mohan 4 years ago

i hope, it must b useful in interview

siva 4 years ago

thanks sir.

thanks sir

pallavi 4 years ago

thanks a lot

arun 4 years ago

pallavi i wanna meet you in bed

hari 4 years ago

ok thanks but i need more

kandasamy 4 years ago

so thank

sharullahwali 4 years ago

thanks for u r good feeling

chiranjit 4 years ago


hanuman 4 years ago

nice....but tube how it works?i didn't understand completely...next.motors and starters are more frequently asked..so,i request u to answer them as well..plzzzzz:)

sara 4 years ago

thank u.....

Abhishek Singh 4 years ago

its good to remind all the basic from power system.....needed some more ques...

Aman Deep Singh 4 years ago

thanks .

deepak rn mishra 4 years ago

i can say only one word i.e .....thanx

rahul 4 years ago

good work ,...thanks

Raju 3 years ago


kartik 3 years ago

Its some how heplfull to student.

karthtik 3 years ago

i remember my eee

Virendra rawat 3 years ago

Thanks so nice of u...

scopy 3 years ago


sundari 3 years ago

it's really helpful

guna 3 years ago


Bantu Sandeep 3 years ago

Thanks Its Really Helpful Thanks Thanks

Basappa chamakeri 3 years ago

Very good

Thank you

suresh gayan 3 years ago

I think this is the best site for interview question & answer

pulkit 3 years ago

Best question & answer for interview .. .its very useful to me.... Thank uh..

Rajagiri 3 years ago

It's very useful viewto inter

3 years ago


kumar 3 years ago

very nice

ali 3 years ago

contents is good for begineers

bereket fanta 2 years ago

i want to thanks this web

VenkatRam Reddy 2 years ago


please send the basic electrical engineer interview equation and answer

my mail id chimmulavenkat@gmail.com

siddique 2 years ago

Very nice the same question asked by aramco clients in mumbai thank you

baskaran robotics 2 years ago

its very useful to me

rraghavendra 2 years ago

TThank u baba

Manish Kumar Rai 2 years ago

hi sir

please send me electrical forman interview question and answer im on going interview my e-mail id - manishrai245@gmail.com

arpit jain 21 months ago

Very usefull details .nice thanks

tushar 20 months ago

Good knowledge

jitendra 19 months ago

Plese explain me circuit of ac/dc led lamp.

prasannakumar 19 months ago

Thank u sir have good useful answer

satheesh 15 months ago


siddikh 13 months ago

thank u so much

abhi g h 11 months ago

so good

Ram Vara 8 months ago

Good keep it up

    Sign in or sign up and post using a HubPages Network account.

    0 of 8192 characters used
    Post Comment

    No HTML is allowed in comments, but URLs will be hyperlinked. Comments are not for promoting your articles or other sites.

    Click to Rate This Article