The value of form factor is 1.1 which is calculated for the
sine wave. At this value of form factor, leakage flux is
minimum and efficiency is maximum for any electrical
machines. These machines are operated at sine waves.
At the time of generation there are many type of losses
therefore earlier use to write 10(+/- 1%)kv so thats why we
generally use to write it as 11kv.Since our ancestral make it
a standard of 11kv,33kv,66kv and as the year pass,many
engineers added a new myth of form factor,10% loss of actual
power.....and thus it make us to suffer a lot.
Since there is 230kv and still like 765kv which are not
multiple of 11.
and production in 11kv and 33kv is more ecnomical
you have an automatic voltage regulator at home for your
appliances,if the voltage in your area drops from 220v to
190v,does the output of the automatic voltage regulator
drops?or does it retains the 220v output?
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
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 ??
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
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.