As a student you have to look out for your own safety. There are jobs or tasks that you are not allowed to do because the law wants to protect you against unsafe situations. Always consider for yourself whether the tasks you have to perform are safe enough.
Of course you are not the only one who has to pay attention to this: your employer must do the same.
You can find extensive information about this on the site www.ikbenjobstudent.be (only in Dutch and French).