guys i am currently working in petroleum ministry so i will share some important matters with you.first of all make sure you study your subjects related to your field.this is very important that you knew the very basics of your field.remember you have to learn a lot to clear the test.few questions on general knowledge,remaining gat type questions.time management is key ,do not leave any question .from my own experience 3 days are enough to prepare the test.take any good book mcq type of your subject and go through it.


best of luck to all of you guys.