An exhaust system should be: Question An exhaust system should be: Answers Loose. Leaking. Fastened securely. Explanation When inspecting an exhaust system, you should verify that parts of the system are not loose, broken, or missing. The system's parts must be properly mounted and should not be rubbing against moving parts of the vehicle. This questions appears in the following tests: Arizona Double Iowa Passenger Minnesota HazMat New Mexico Double South Carolina Class B Knowledge Test Utah Tank Vermont Tank Vermont Tank Virginia Class A Knowledge Test