Question { NTPC, 10098 }

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.

Answer

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.