Friends this is Shubhrajyoti Roy from Jamshedpur Jharkhand
I have done my Electrical Engineering from NIT Jamshedpur
2014 to 2018
During my Placement Season I bagged
two job offers successfully
luckily I would say
One was at Larsen & Toubro Ltd.
Another at Tata Steel Ltd. where I am presently working
This is a small video clip regarding the glimpse
of the interview process at Larsen & Toubro Ltd.
Good Morning Shubhrajyoti!
Good Morning Sir!
Are you feeling nervous? Didn't sleep last night?
No Sir, actually I was having cold last night
So took some medicines which
helped me to get great sleep
And how was your GD Mr. Roy?
Good I think so
Was it only good?
Sir I think I performed well
I must tell you it was excellent
Thank you sir
Okay Mr. Roy, Tell me about yourself
Myself Shubhrajyoti Roy
born & brought up in Jamshedpur
And done my schooling from Jamshedpur Public School
After 12th I went to GCECT Kolkata
to pursue my B.Tech in Ceramic Engineering
And in the subsequent year I reappeared for JEE
to thankful to continue my engineering studies
in my hometown
I have done my Internships at Tata Steel & JUSCO
And had plant visits at Tata Motors & Tata Power
Were you able to continue your good academic record
in your college also
Not really Sir! Partly because I was more
involved in things apart from studies
And partly becasue we were expected to write long
answers but I preferred to write briefly but correctly
That said I have recently ranked 3rd
nationally in short term course, 'Principles of HRM'
from VGSOM IIT Kharagpur
Okay... That's Great!
Well your father also works in Tata Steel
Is he also with Electrical background
No Sir, he works in Refactories Division, Material Science
That's great then why did you leave Ceramic Engineering than?
After going there my seniors & Professors advised me
that I deserve a better college like NIT or IIT
Generally when you have some small electrical issues at your home
like your fan is not working or the tube is not glowing
who fixes it up, I hope its not you
No sir,  my father fixes them all
Why did you take up Electrical Engineering?
It's because I loved it and
understood it very well
compared to the Mechanics in class 12 Physics
And you have done 1 year Internship at JUSCO also
So what kind of company it is?
Sir it is a Utility company
which handles the utility services in
Tata Managed Areas & townships
Its a company which has won Gold Shield
in Power Sector for last 3 Years
Shubhrajyoti what was your training related to?
Study of Power Distribution in Jamshedpur
Okay
Where do you see or find
the basics of Electrical Engineering around you
Sir right now in this room we have a switch board
which is a mini switch gear, which has a switch,
a fuse, and Air Conditioner over there has an MCB
The light in this room glows the moment
we switch on the switch
Despite the fact that the drift velocity
of the Electrons is too low
The Street Lights outside are connected in parallel
if one gets fused the others are still working
I think these are where the basics of Electrical
Engineering comes into play
Do you know Kirchhoff's Law?
Yes Sir
Okay
You went to Tata Power also
What are their operations?
Sir it's a Coal Based Power Generation Plant
which generates solely for Tata Steel
And where is it located?
Sir I don't remember the exact name
but it's located in the outskirts of Jamshedpur
Okay, No Issues
What was the project you did in Tata Steel
Study of AVR at Power house 5
Its a Captive Power House of Tata Steel
You have lot of knowledge of
Generation & Distribution also
Can you show me an SLD of Power Generation
to the Distribution to your house
mentioning various levels of voltage
Sure Sir
Good
Can you tell me about Cascade Tripping?
No Sir
Then I should say you really had a lucky generation
Can you tell me what's MD?
Yes Sir Maximum Demand or Peak Demand
in a given Time Period
So if in any way your Maximum Demand is being more
Than the Generation Capacity, What will you do?
Sir we will need to shed the load through load shedding?
Good
Why are AVR required?
In Power transmission systems since most loads are inductive in nature
there is always reactive power present in the system
This reactive power demand and supply needs to be maintained
at all times in order to prevent voltage fluctuations
AVR is used for this purpose in the Generators or Alternators.
t helps  to maintain a desired voltage level  by increasing
or decreasing the excitation of the Generators
and in turn increase / decrease its reactive power
as per demand fluctuations.
What is Power Factor?
Power factor is the ratio of true power or active power
to the apparent power. it has to be “ideally” one 1.
Higher is the power factor , more is the efficiency
and less is the loss in the system.
If it is too low, then cable overheating and equipment overloading
will occur that may cause voltage dip.
For low power factor : To meet actual power load has to
draw more current, resulting in more losses
And for high power factor, vice - versa
Do you know what are the different types of starters used in induction motor ?
Direct on-line starter, Star-delta starter, Autotransformer starter.
Why are Starters used?
When the supply is connected to the stator of a three-phase induction motor
a rotating magnetic field is produced and the rotor starts rotating.
Thus, a three-phase induction motor is self starting.
At the time of starting the motor slip is unity
and the starting current is very large
The purpose of a starter is not to start the motor
as the name implies but it performs primarily two functions :
One to reduce the heavy starting current.
Two to provide overload and under-voltage protection
Induction motor at times faces crawling and cogging issue,
any idea why it happens?
Tendency of the motor to run at a stable speed as low as
one-seventh of the normal speed N5
and being unable to pick up its normal speed
is known as crawling of the motor
And now about Cogging or Magnetic locking
Sometimes, even when full voltage is applied to the stator winding,
the rotors of the 3 -phase cage induction motor fails to start.
This happens when the number of stator and
rotor slots are either equal or have an integral ratio.
With the number of stator slots equal to or an integral multiple of rotor slots,
strong alignment forces are produced between stator and rotor at the instant of starting.
These forces may create an alignment torque greater than the acceleration torque
with consequent failure of the motor to start.
This phenomenon of magnetic locking between
stator and rotor teeth is called cogging or teeth locking.
Okay
"so... you were not able to answer Cascade tripping. Right?.
Sir if you don't mind explaining
Okay I'll tell you
Cascade Tripping occurs during under frequency or
other unbalance condition
Usually when due to some reason a Generating unit fails
it leads to
Supply gap...
If the existing Generating units can’t withstand the instant increase in load
then subsequently other generators will also trip
leading to ultimate collapse of the Grid
Sir that’s something which I think happened a few years back
in 2012 or 2013 in the Norther and Eastern grid"
Ok Mr. Roy .   I can’t tell you what your results will be
because they are going to consider all your written , GD & interview marks
But whatever the results I must say we are impressed with your attitude
And finally that's what is going to take you higher in life
Don't you think so?
Thank you Sir, Hope so!
Any question if you have, you can ask
Sir I want to work in L&T’s International Business Domain
And also like to do an MBA?
Yes you can and as far as MBA is concerned we do sponsor candidates
to IIM A , XLRI etc
but that depends on the fact that you qualify certain parameters .
Thank you Sir! Pardon me if I did some mistakes
Because it was my first interview
No. You were really good. All the best!
Thank you Sir!
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which will help you in your interviews also
And thanks to the whole RU buZZing Team
for taking such a great initiative
for taking the student fraternity forward
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You can comment in the comments section below
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Thank you, Best of Luck
For your future Endeavors
May peace be with you!
