Question Dual tires should: Answers Not both be in contact with the road surface. Not touch one another. Be different sizes from one another. Explanation When inspecting a vehicle, you should verify that your dual tires do not come into contact with one another, or with any other part of the vehicle. This questions appears in the following tests: Idaho Class A Knowledge Test Mississippi Passenger Missouri Class A Knowledge Test Nebraska Class B Knowledge Test Oregon Class A Knowledge Test South Carolina Class B Knowledge Test South Carolina Tank Tennessee Class A Knowledge Test