As you want to get the details of various PSU entrance exams in India so here is the information of the same for you:

PSU’s entrance exam papers consist of these sections:

Technical Section: Subject specialization of related stream
Non-Technical Section: General Awareness, Current Affairs, English Language, Reasoning & Aptitude.

Generally 50% to 70% question are from technical section

Exam Pattern of Some of PSUs:
PSU Post Exam Pattern
BARC JRF, SRF, Research Associates Application Screening/GATE Score
Personal Interview
BEL Probationary Engineer Written Test -Objective
Personal Interview
BHEL Engineer Trainees Written test-objective GATE Exam
Personal Interview
BPCL Management Trainee Written test
Personal Interview
Bridge & Roof co. (I) Ltd Trainee Engineers Written Test – Objective
Personal Interview
BSNL JTO Written Test- Objective
Set A :Engg stream (50 questions)
Set B: Engg stream
(50 questions)
Section C: General Ability Test (20 questions)
DMRC Junior Engineers Written test(2papers),
Psycho Test / PI
DRDO Scientist-B Entry Written Test-objective – 3 hours
Set A: 100 questions
Set B: 50 questions
Personal Interview
ECIL Graduate Engineer Trainee Written test
Personal Interview
GAIL Executive Trainee Written test
A. Subject Specialization: 100 questions.
B. General Aptitude: 50 questions
Duration: 2hrs
Personal Interview
HPCL Officer Trainees Written test
Interview
Indian Railways Section Engineer Written/online test & Document verification

IOCL Engineers/ Graduate Apprentice Engineers Written Test – GATE Exam
Group Discussion
Personal Interview
ISRO Scientist/Engineer SC Written Test -Objective
Personal Interview
MTNL JTO Written
Aptitude Test
Skill Test
Personal Interview
NALCO Graduate Engineer Trainee Written Test
Interview
NHPC Trainee Engineers Written test
Set A: Engg Stream – 140 questions
Set B :General Awarness-30 questions
Set C: Reasoning – 30 questions
Personal Interview
NTPC Executive Trainees Written Test – GATE Exam
Set A: 55questions (Technical)
Set B: 35 questions (Aptitude)
Negative marking: ¼ marks
Group Discussion
Personal Interview
ONGC Graduate Trainees Written test (Objective and Subjective)
Psychometric test and PI
PGCIL Executive Trainees GATE Score Basis or
Written Test – Objective- 2hrs
Set A: Technical knowledge test 120 questions
Set B: Executive Aptitude test 50 questions.
Group Discussion
Personal Interview
PRASAR Bharti Engineering Assistants Written Test
Set A: Engg Stream
Set B:GK & CA
SAIL Management Trainee Written Test – Objective
Group Discussion
Personal Interview
SJVNL Executive Trainees Written Test – Objective
Group Discussion
Personal Interview
STEEL Management Trainee Set A: Engg Stream
Set B: Aptitude & English
Personal Interview
VIZAG Management Trainee Written test