Based on CPI/CGPA they shortlist the candidates & than
directly start Interview so there is no Written Exam or GD
Only PI.Interview held @ MNNIT , ALLAHABAD On-Campus on
6th,Aug, 2007 & the Questions asked to me by Interview Board
( 4 People) are from HR/SummerTraining/BTP/Subject-core,
POWER SYSTEM & MACHINE. time duration of I/V is about 15-20
Minutes.
HR-
Q.1 Name,hobbies & About family background ?
Q2.What u know abt NTPC ??
Q3.Why u want to choose NTPC as ur Carrier's starting i.e
power sector not any other Oragnisation or sector ??
Techincal Questions-
Q1.What is the reason for transformer Noise ??
Q2.Which material is used for making Transformer oil & How u
measure its dielectric strength & Name the test ?
Q.3 Which Machine u will prefer 2 use if flammble gases are
coming out at a place & why ??
Q4.What is relation b/w Transmission Lines & Communication
Lines ?
Q5.What is the maximum capacity Synchronus Machine & total
powerGeneration in our country ?
Q.6 In india Power generation is at 50Hz while in America
its 60 hz ,why so ?? Advantage or disadvantage ??
Q.7 Maximum Generation Voltage in india ?
Q8. What is the Voltage regulation & why its required n how
much is permissible ? & causes of voltage variation ??
Q.9 Why electric shock is feel ?? n in a Electric Train why
we didnt feel that ?
Q.10 Have u seen/ experience of any power plant/ industry
related to the power sector ?
so these are the questions which not too diffcult i
think was asked to me.
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Answer / shivangi
for Q no.4
The technical field relates generally to a transmission
device for transmitting a signal through a transmission line
between circuit blocks having different power supply systems
and to a semiconductor integrated circuit for communications
suitable designed to communicate by using a differential
voltage signal between communication lines.
| Is This Answer Correct ? | 2 Yes | 1 No |
Answer / jiten sharma
For question 4:
Transmission line is basically used to transmit the power
for long distance. the voltage rating for transmission is
different based on the distance between the sending and
receiving end station i.e. 66 kV, 132 kV, 220 kV, 400 kV
now days in india we are developing the grid at 765 kv
voltage level also.
While the communication line is basically used for transmit
the signels from sending end to receiving substation with
the help of PLCC (power line carier communication). which
is part of transmission line. High frequency singles are
super imposed with transmission line which are used for
comunication and protection purpose.
Regards,
Jiten sharma
| Is This Answer Correct ? | 0 Yes | 0 No |
Answer / divya
Can you please give me the answer for Q) 3, 5, 7, 9
| Is This Answer Correct ? | 0 Yes | 1 No |
Answer for Q1
when we will give the supply at primary side the transformer core will COMPRESS and ELONGATION and this
is called MAGNETO DESTRUCTION,DUE to this reason the transformer make noise.
| Is This Answer Correct ? | 0 Yes | 1 No |
1.when in a transformer its varnish become burnt, than air
surrounds the space and it works as a capacitor,thats why
noice is occured.
2. transformer oil dielectric strenth is measured by Break
down voltage test.
| Is This Answer Correct ? | 1 Yes | 8 No |
How to measure 20 hp motor resitance
how is working d.c amps meter?how to connect the dc ammeter inthe circuite?
when ur using single phase type of load for a 3.5core power cable .Why neutral is .5 and how much current in the neutral if we consider neutral as a reverse path for three phases.
What is ment by KVAR and what are the advantage&dis- advantages of KVAR
HOW TO SELECT THE COPPER CABLE SIZES OF MOTORS,TRANSFORMERS?
depletion layer will form beforre biase or after bias ?
How to measure corona loss in a transmission line?(Plz ans only if u know the exact answer)
what is circulating current in parallel transformer???plus how it is generated ???plz explain in detail.........
what is the difference between high impedance REF & REF, same high impedance differential protection & differential protection for Power transformer?
What is d main advantage of using double circuit 3 phase transmission ?
We store the d.c supply...then why can't we store A.c supply???
What is meant by short-pitched winding?
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