Once cargo is secured: Question Once cargo is secured: Answers You may complete an entire trip without checking it. You can drive at least eight hours without checking it. You should check it every three hours or 150 miles. You should not check it. Explanation The securement of cargo must be checked before beginning a trip, within the first 50 miles of a trip, and then again every three hours or 150 miles. This questions appears in the following tests: Connecticut Double District Of Columbia Class B Knowledge Test Illinois Class B Knowledge Test Indiana Class A Knowledge Test Maryland Class A Knowledge Test Massachusetts Class B Knowledge Test New Jersey Class B Knowledge Test Wyoming Passenger