Practice question What is the 'hearing aid required' restriction? A restriction that requires you to wear a hearing aid at all times when driving a CMVA restriction that is placed on your CDLA restriction that you may have if you have a hearing impairmentAll of the above Answer: D — All of the above The correct answer is shown above. Try the full quiz for additional practice. Practice more: CDL School Bus Practice Questions - CDL School Bus Endorsement Exam →