Question Pre-trip inspections are: Answers Recommended. Needed only for trips longer than 100 miles in length. Required by law. Explanation Federal and state laws require drivers to inspect their vehicles before every trip, regardless of length. This questions appears in the following tests: Alabama Class B Knowledge Test Alaska Double California Class B Knowledge Test California Passenger Hawaii Class B Knowledge Test Maine Double Maine Tank Montana Class B Knowledge Test North Carolina Class A Knowledge Test North Carolina Class B Knowledge Test Ohio Class A Knowledge Test Rhode Island Class B Knowledge Test Rhode Island Double Vermont Class A Knowledge Test Vermont Tank Virginia Tank Washington Double Wisconsin Passenger