You need to do this:
Sit down with a piece of paper, a pen, and a cup of coffee.
Plan out a budget if you didn't have the factory job.
Is the school job a steady 34 hours a week?
Can you live off of 34/week?
How much do you lose if you quit the factory?
If the awnser to any of those is no, then keep the factory job, and suck it up until the other one goes full time, then get out of it, because then there's no risk.