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Aug 7th, 2011 Comments: 72

Electrical engineering job interview questions

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ELECTRICAL ENGINEERING INTERVIEW QUESTIONS

Electrical engineering job interview questions are mostly gathered from engineering students and just graduated electronic engineers with a noble thought to help job seekers in the field of electrical engineering.

electrical engineering interview questionsQ1:- What are the advantages of P-N diode or PIN diode ?

Ans:-Decrease in capacitance because capcitance is inversely propotional to the separation of P and N regions,So it allows a diode a faster response time.Hence ,PIN or P-N diodes are used at higher frequencies Approximately 300 MHz or more then 300 MHz. Another advantage is that, the possibility of greater electric field between P and N junctions. It enhances the electron-hole pair generation there by enabling PIN diode to process even for very weak input signals

 

Q2:- How can you convert AC input signal into DC output signal using power supply and which components are used in this procedure ?

Ans:- AC input signal can be converted in to DC output signal by using REGULATED power supply and the components used for the procedure are transformer,rectifier,filter,Voltage regulator and voltage dividor

 

Q3:- What is purpose of Transformer in Electrical engineering ?

Ans:- The job of transformer in electrical engineering is either step up or step down.Mostly step down transformers are used in electrical engineering. The job of transformer is to suit the requirment of the solid state electronic devices and circuits fed by the dc power supply. It also provide isolation from the supply line which is an important safety considration.

 

Q4:- Why we use underground cables ?

Ans:- underground cables are used where over-head lines are not possible as in large cities despite the fact that in their cost, cost per kW (kilo watt) per kilo meter is much more as compared to over head transmission lines. Another advantage of over-head system for distributors is that tapping can be made at any time with out having any disturbance which is very important for rapidly developing areas.

 

Q5:-How can you divide cables into group ?

Ans:- cables are divided in to three groups

1: Low tension cables — up to 1000 volts

2: High tension cables — up to 23000 volts

3: Super tension cables — from 66 kV to 132 kV

 

Q6:- What are the essential parts of the Generators ?

Ans:- The generator consist of the following essential parts: Magnetic Frame or Yoke, Pole shoes ,Pole coils or field coils , Armature core, Armature winding or conductors,

commutator and brushes and bearings

 Senior Electrical Engineering job interview questions

Q7:- What is the purpose of armature core ?

Ans:- It houses the armature conductors or coils and causes them to rotate and hence cut the magnetic flux of the field magnets. In addition to this its the most important

function is to provide a path of very low reluctance to the flux through the armature from a N – Pole to a S – Pole.(It is cylinderical in shape and is built up of usually circular sheet steel discs or laminations approximately 0.55 mm thick)

 

General Electrical engineering interview questions

Q7:- What are the purpose of Yokes ?

Ans:- It provide mechanical support for the poles and acts as a protecting cover for the whole machine and it carries the magnetic flux produced by the poles.

 

Q8:- Is that true, that the use of dc motors are either essential or else is advantageous to a degree sufficient to make it preferable to alternating current?

Ans:- Few cases are listed below :

1: Because of their excellent starting and over load characteristic dc motors are most suitable for electric traction on tramways, sub urban and under ground railways.

2: DC is absolutely essential for electrolytic and electro-chemical processes such as electro platting, electro – refining , production of aluminium , Cu and other metals by electro-lysis and fertilizers

3: It is essential for battery charging work.

4: It is necessary for running arc lamps for cinema projectors and search lights and also for some types of arc- welding.

5 : The most important aspect of this is that,DC motors are more superior to a.c motors for duties where frequent starting angainst heavy torque ,close speed adjustment and frequent reversals are required for example elevators , printing process , large machine tools drivers and certain steel mill equipments

 

Q9 :- Inside a conducting sphere which thing is always remains constant ?

Ans:-  Potential should be reamain constant inside a conducting sphere

 

Q10:- Like a resonant R – L – C circuits what should parallel resonant circuit also had ?

Ans:- Like a resonant RLC circuits parallel resonant circuit should also had a power factor of unity

 

Q11:- What is thyristor?

Ans:- The thyristor is a solid-state semiconductor device with four layers of alternating N and P-type material. They act as a switch conducting when their gate receives a current pulse and continue to conduct for as long as they are forward biased.Thyristors are mainly used where high currents and voltages are involved and are often used to control alternating currents where the change of polarity of the current causes the device to automatically switch off; Thyristors can also be found in power supplies for digital circuits where they can be used as a sort of circuit breaker

 

Q12:- What is the power ratio between power in Star and Delta circuit?

Ans:- power is same,its only the line currents and voltages which differ in star and delta circuits and you can say that it is 1:1

 

Q13:- What is a Transducer?

Ans:- Transducer is a device which converts physical quantity into electrical quantity. As-Thermocouple (convert temperature into electrical volt or current)

 

Q14:- What is UPS ?

Ans:- UPS mean uninterruptible power supply.This system can be of two major types and work to ensure uninterruptible power within a specified period before backup comes in.

There is a static type and the mechanical type.

The static type is common and consists of the rectifier/battery/inverter making up the system where as the mechanical type consists of transfer switch backup generator and an electric motor directly coupled to motor-generator through a flywheel.

Static type has the advantage of less maintenance when compared with the mechanical type with rotating parts.

 

Q15:- For an 100kw generator, only 50kw of load is connected. will the generator generate only 50kw or 100kw?

Ans :- If we have 100KW generator and load is 50Kw generator generate only 50kw.but If we have 100KW generator and connected more then 100KW the generator tripped at overload (if there is circuit breaker).

Above list is few important electrical engineering interview questions and if you feel we missed any important, then please add in the comments.

Comments

( 72 )
  1. pradeep May 13th, 2012 8:54

    read it carefully

  2. mahesh May 15th, 2012 19:46

    sir please mail me the electrical interview questions and answers.

  3. susanta May 17th, 2012 3:12

    sir please mail me industrial maintenance electrical interview question & answer

  4. noushad May 18th, 2012 2:04

    sir please mail me the elecrical design interview based questions and answers

  5. Anonymous May 22nd, 2012 22:40

    sir please mail me industrial maintenance electrical question & answer.

  6. sudheesh May 28th, 2012 10:41

    sir please mail me electrical objective type question and answer

  7. muhammad afzal May 30th, 2012 13:01

    sir please mail me electrical objective type question and answer

  8. kamal Jun 2nd, 2012 7:01

    i become learn more thing & awaare after reading the topics.

  9. manuel S mathew Jun 6th, 2012 1:22

    Questions r so useful and I would like to learn more about electrical engg.

  10. rakesh pathipati Jun 12th, 2012 22:45

    provide more questions on power systems and power electronics

  11. shrawan kumar Jun 18th, 2012 3:20

    please sir send me a oil and gas field electrical project and operation question

  12. G.Narendra Jun 18th, 2012 20:00

    please sir send me a thermal power plant electrical interview questions & answers.

  13. muraliprasath.m Jun 23rd, 2012 12:36

    sir please send tips for how to prepare for gate and how get job in automation field and how improve knowledge in that field any course for automation.

  14. J Jul 1st, 2012 11:39

    Thanks. These people commenting are stupid as hell.

  15. bodhanand choudhary Jul 5th, 2012 1:35

    what are different types of circuit breaker used in thermal power plant??
    give me reply………waiting for your valuable reply

  16. amit saini Jul 7th, 2012 19:01

    sir, plz give me some questions

  17. naveen Jul 8th, 2012 23:33

    sir plz send me intervew question and answer

  18. naveen Jul 8th, 2012 23:34

    sir plz send me interview question and answer

  19. TUSHAR MAJI Jul 9th, 2012 2:00

    please sir,
    send me the all interview and aptitude in electrical engg for freshers question and answer…….
    please sir.

  20. priyanka palkar Jul 9th, 2012 22:51

    plz sir send me all interview questions and answers of electrical engg asked for freshers in interview.

  21. Udbhav Tripathi Jul 10th, 2012 8:30

    pls. rply for this question.

    what are the changes made in Induction Motor , so that it act as Induction Generator ?

  22. AMOL Jul 20th, 2012 4:14

    sir, can we get the some other site related this type question

  23. Siddharth Gupta Jul 28th, 2012 4:42

    Dear sir,
    Can u send me some plc n drive related interview questions?
    Rply soon

  24. Richard Jul 30th, 2012 8:41

    please help me I am going for interview this week and I want interview question and answers on transformer, motors and generators.Above all general interviews question and answers

  25. Ashutosh Aug 2nd, 2012 5:44

    sir .
    plz mail me maximum possible electrical engineering question for interview ,

  26. mathan Aug 16th, 2012 23:27

    vaccum, sf6 circuit breakers are using at thermal power plant, based on current rating they are implement these kind of breakers, arc quenching is maximum in high rate of current, tats y they are using sf6 breakers, vice versa for vaccum

  27. LAKSHMAN SINGH Sep 1st, 2012 22:25

    Sir please send me question of section engineer in railway in electronics & telecmmunication

  28. anand Sep 4th, 2012 3:26

    please mail me electrical interview question and answers

  29. admin (Admin) Sep 4th, 2012 7:41

    Hi Lakshman, we will be sending you soon.

  30. Kavita Sep 16th, 2012 1:57

    respected sir/mam
    please mail me electrical and electronics branch interview question and answer

  31. Preeti Feb 16th, 2013 10:24

    Sir could u please mail these questions to me.These are really very helpful…

  32. Pradip Dikshit Feb 27th, 2013 8:39

    sir please mail me the electrical interview questions and answers.

  33. Vijayabaskaran Mar 1st, 2013 2:13

    please help me I am going for interview this week and I want interview question and answers on transformer, motors and generators.Above all general interviews question and answers

  34. Arunprasath Mar 9th, 2013 9:05

    hello sir, i need electrical engineer interview question for oil and gas construction field.
    please send me. thank you.

  35. siraj Mar 11th, 2013 18:16

    sir .
    plz mail me maximum possible electrical engineering question for interview ,

  36. riswan Mar 14th, 2013 4:39

    good i get more knowledge

  37. Lohit Patade Mar 20th, 2013 4:41

    sir,
    plz mail general basic electrical engineering question for interview ,

  38. kalpesh Mar 22nd, 2013 2:51

    no

  39. Thyristor Mar 22nd, 2013 6:38

    Dode! Interview made easy, itz wonderful.

  40. shahzad awan Mar 24th, 2013 11:13

    i read these question andanswer, its very useful, pls pls if possible pls mail me question answer about operation and maintenance.
    Best Regard
    shahzad awan

  41. Ajit kumar panda Mar 29th, 2013 6:53

    sir plz mail me the electrical question and answers which were frequently asked in interview

  42. Dharmendra kumar sen Apr 4th, 2013 4:12

    please mail interview question of electrical & electronics engineering question

  43. sandeep goyal Apr 5th, 2013 22:30

    hello, sir
    plz mail general power system(electrical engg.) based interview question.

  44. KIRAN KUMAR.H Apr 14th, 2013 3:07

    Plz mail related thermal power plant electrical engg manager grade interview questions.

  45. sankar Apr 17th, 2013 1:00

    pls send the electrical interview question

  46. Gourab Dutta Apr 19th, 2013 9:23

    sir please mail me electrical interview questions and answers.

  47. Gourab Dutta Apr 19th, 2013 9:26

    sir please send me electrical interview questions and answers.

  48. sarath Apr 19th, 2013 20:53

    sir , its very useful to me , i have to attend interview please mail me basic questions.

  49. sarath Apr 19th, 2013 20:55

    sir , its very useful to me , please mail me more questions about power systems and electrical machines.

  50. DIPANKAR CHAKRABORTY. Apr 22nd, 2013 6:40

    how can i solve inrush current problem.

  51. DIPANKAR CHAKRABORTY. Apr 22nd, 2013 6:49

    Sir, pl, send me some essential electrical question & answer which is always use
    & applicable of our natural work site in running industrial project. And erection of new electrical project including testing, commissioning.

  52. DANISH AKTHAR K Apr 23rd, 2013 21:57

    sir,
    i am a electrical engineer.i am going to face an interview by an construction company.so what are the interview questions they ask??

  53. manoj Apr 24th, 2013 2:36

    good topics as covered

  54. rajan May 1st, 2013 7:16

    plz add some more importent question about electrical not only electronic

  55. akash ranjan behera May 23rd, 2013 21:09

    pls sir send to me all types questions with answer,which are eligiblefor diploma electrical engg.pls pls pls

  56. Dan Lin May 31st, 2013 11:55

    Sir, I will have two interviews: one in a power generation company, the other one is in a oil and gas company. please send me more electrical interview questions according to these area. Thanks..

  57. Anonymous Jun 1st, 2013 9:40

    thank you.

  58. abdul ahadullah ansari Jun 11th, 2013 21:16

    pls sir send to me all types questions with answer,which are eligiblefor diploma electrical engg.pls pls pls

  59. sangeed Jun 12th, 2013 22:34

    sir please send me electrical interview questions and answers.

  60. rukmani Jun 15th, 2013 12:06

    Sir, Please mail me Q&A related to Electrical Engineers in Oil & Gas Industry.
    Please help.
    rgds

  61. Raj s Jun 16th, 2013 5:25

    sir please sent me the electrical and electronics interview guestions and answers please sir..

  62. preethi Jul 6th, 2013 1:58

    sir, please send me some questions which will be asked in a construction company for an electrical engineer

  63. Debasish Ghosal Jul 13th, 2013 3:31

    Pls sir mail me machine’s question

  64. Anil Jul 17th, 2013 6:52

    Sir pl. send me some Ques & Ans electrical & Electronices for ITC Ltd. I/c level
    Exam

  65. Sijo Jose Jul 25th, 2013 20:35

    Sir, please mail me some intervew questions for Electrical maintenance technician in oil and gas field.

  66. pankaj singh Aug 5th, 2013 0:11

    Sir,

    Please send me some interview question for Electrical maintenance in utility maintenance relative.

  67. anilprajapati Sep 14th, 2013 12:12

    sir
    plz send me interview question in electrical engineering for
    job purpose in industrial job

  68. anilprajapati Sep 14th, 2013 12:12

    sir
    plz send me interview question in electrical engineering for
    job purpose in industrial job.

  69. sandeep gupta Mar 3rd, 2014 14:43

    sir,please mail me the questions/ans which are asked in ofline campus engineering exams.

  70. nijham mydeen May 25th, 2014 13:14

    Thank you for your notes sir. Please sent electrical electronics interview guestions and answhare my mail id

  71. pankaj kumar Aug 31st, 2014 14:06

    Sir,please send me elctrical engg interview question for diploma.

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