BARC Electrical Actual Interview Questions asked & Experience. How you should prepare for BARC interview Electrical branch

BARC Electrical Actual Interview Questions asked & Experience. How you should prepare for BARC interview: electrical branch

The interview panel at BARC asks questions on the following subjects: Network theory, Electrical Machines, Power system & control systems. The panel will ask questions specifically related to these subjects, but they will go into great detail. This depth of questioning can focus on either theoretical or practical applications of the subject matter. Therefore, be prepared for unexpected and challenging questions. The panel is known to be very supportive and will offer hints to guide you. If you are able to articulate your ideas effectively and possess a strong understanding of the subject matter, then you have a good chance of succeeding. Below you will find actual interview questions asked in BARC interview for the electrical branch. Here I am sharing the interview questions asked from Electrical machines in BARC interview.

The interview panel at BARC asks questions from the following subjects: Network theory, Electrical Machines, power systems, & control systems. The panel will ask questions specifically related to these subjects, but they will go into great detail. This depth of questioning can focus on either theoretical or practical applications of the subject matter. Therefore, be prepared for unexpected and challenging questions. The panel is known to be very supportive and will offer hints to guide you. If you are able to articulate your ideas effectively and possess a strong understanding of the subject matter, then you have a good chance of succeeding. Below you will find actual interview questions asked in BARC interview for the electrical branch. Here I am sharing the interview questions asked from electrical machines in BARC interview.

The important question also covering the concept of slip in induction machine. The graph approach is also very critical while solving or expressing the concept. Speed-torque curve for four induction motor
1. Sphere 2. Poly-phase 3. Poly-phase deep bar 4. Poly phase double cage.

• Breakdown torque


• Locked-motor torque


• pull-up motor torque

The questions also covering the rotational reversal concept of many motors like single phase motors (i.e., shaded pole motors, reluctance motors, etc. The three phase motor can be revered by swapping any two phase row VFD has used for this purpose?
The concept also deals with transformer working, test like SC test, OC test, and the back-to-back test. Magnetizing property of transformer, speed control of many motors (AC & NC), and imp-regenerative breaking.

Type of load on the AC machine and the loading nature of the generator & motor graph attached to it.

1. What are the family member of thyristor?


2. How G/O are different from other number?


3. Why G/O has lesser tan gain or t off gain?


4. What are generally do to suppress the over voltage spike during turn off?


5. What is the region behind the efficient & compactness of GTO?


6. What the voltage drops when compare with other.


7. Draw the UI hoariest of GTO?


8. What is the region behind the interdigital gate cathode structure?


9. What is the problem related with parallel operation of thyristor?


10. What is the role of equalizer in count sharing equal path?


11. Significance of anode shorted GTO structure?


12. In case of GTO & SCR Latching current & forward leakage current is same?


13. Whether the GTO is symmetric or not?


14. In conventional SCR why the current is kept high?


15. Advantage of GTO over conventional thyristor?


16. How the GTO can be design with the help of two NPN & PNP transistor?


17. What is the range of voltage over which GTO is design?


18. How the GTO is different from IGBT?


19. What is the role of GTO in VFD?


20. In induction heater how the GTO is used?


21. What is Adjustable frequencies inverter drive?

Electrical Machine Interview Questions

1. Define the Transforms? What are the types of Transforms? Difference between the core type and shell type Transforms?


2. How to calculate the  of the transformer (T/F)? At full load?


3. What is voltage regulation of T/f? At different loading?


4. What is commutation, pole pitch, front pitch, resultant pitch, Commutation pitch, Equaliser, Dummy coils?


5. Why is armature reaction absent in ‘Induction machine’ but present in DC & synchronous M/c?


6. Why air gap is higher in synchronous m/c?


7. Why air gap is less in case of induction M/C?


8. What is the role of Earthing in care of Transformer?


9. What is difference between Earthing and grounding?


10. Why 3-synchronous motor is not self-starting?


11. Difference between induction & synchronous M/C?


12. What happen to the (efficiency of T/F if PF(Power Factor) of load is changed from 0.8 lag to 0.8 load remaining all the parameter remain some?


13. Why alternator is grounded by resistance &motor are grounded by reactance?


14. Why inter pole & compensating winding are necessary if we want to control the speed of motor above base speed?


15. What is linear induction Motor?