What is BNOR exam? BNOR exam stands for car further investigation driving proficiency, also known as the state exam. If you fail the CBR practical exam 4 times within 5 years, you automatically take the BNOR exam. You will not notice much difference yourself when you take the practical exam BNOR. For the practical BNOR exam you will come to the same CBR location as before. You will not notice any difference from the examiner and his instructions during the ride.