Question The use of a hand-held mobile device while driving is: Answers Prohibited. Acceptable if weather conditions are clear. Permitted if use is work-related. Explanation Using a hand-held mobile telephone while operating a CMV is both illegal and dangerous. This questions appears in the following tests: Alaska Class B Knowledge Test Arkansas Class A Knowledge Test Idaho Class A Knowledge Test Maine Tank Maine Passenger Maryland Class B Knowledge Test Michigan Class A Knowledge Test Michigan Passenger New Mexico Class A Knowledge Test New Mexico Double North Carolina Class B Knowledge Test North Carolina Class B Knowledge Test Ohio Class A Knowledge Test Oklahoma Passenger Rhode Island Double Tennessee Bus Washington Class A Knowledge Test