Question The driver of a commercial motor vehicle: Answers Can use any cell phone while driving. Can only use a hands-free mobile phone while driving. Can only use a cell phone on rural roads. Can use a cell phone at night. Explanation It is prohibited for CMV drivers to use hand-held mobile phones while driving. Take a FREE Practice Test Now This questions appears in the following tests: Nevada Knowledge Test Class A , New Hampshire Knowledge Test Class A , New Jersey Knowledge Test Class B , West Virginia Double ,