if u did well academically but don't know how to work, no point right?

If u get the scholarship, just go ahead and study.
If Petronas need u in the future, they will hire you.
If not, u may need to pay back sum amount of money depend on ur academic result.

As David83 said, I also heard from a senior.
E&E engineers are saturated in Petronas now......where most of the seniors with mechanical already secured a job.