It really doesn’t matter how well you did on the exam. If during pre-employment, they find something unfavorable in your paperwork they will disqualify you and use that rule to justify their determination. By unfavorable, I mean you owe tickets, a bad driving record, certain instances of termination from employment or city employment. Most of all dishonesty. Transit will hire people with a criminal past but will not deal with liars. If you are squeaky clean then yes, get a lawyer. Do you have a feeling why they may have disqualified you?