Quantitative : 30 Minutes
Reasoning / Analytical : 30 Minutes
Verbal English : 20 Minutes
Technical : 20 Minutes

Details of types of questions asked in each of the sections:
VERBAL ENGLISH: Not difficult
Paragraph questioning,questions on articles,jumbled sentences etc are models.
QUANTITATIVE: VERY lengthy and time taking
I suggest u to select and answer the questions which u feel easy.
ANALYTICAL:NOT DIFFICULT
TECHNICAL: MEDIUM

Name of the Topic / Task : Various
Time Given : 45 Minutes

Details of the process and your contribution:
GROUP DISCUSSION:
Here each individual has to take a slip and a problem is given in it.
1 min to read, 1 min to explain it to others , 3 min to discuss the solution and conclucion.

Questions related to ur favourite subject will be asked(mostly)
For me I told power system protection as favourite.
So he asked me about various protections of transformers, lines, generators etc.
Also he asked me losses in a alternator, what are types of circuit breakers?

Regular questions like tell me about yourself, family background, do u have any issues regarding the place and profile.
Why do want to join tata power? etc

In GD try to support ur decisions.
IN technical round choose a subject in which u are strong and prepare well in that subject.
Please don't say "I don't know" many times. Atleast try to say what you know.