A vehicle inspection: Question A vehicle inspection: Answers Is a waste of time. Is helpful in identifying minor issues before they become major problems. Should not be done by the driver. Should be performed once a month. Explanation A vehicle should be inspected before every trip to help ensure that any small mechanical issues are caught before they become more serious problems. It is better to discover a problem with your vehicle before a drive than after the drive has begun. This questions appears in the following tests: Illinois Class B Knowledge Test Illinois Passenger Indiana Double Oregon Tank South Carolina Passenger Utah Class B Knowledge Test