Parts of an exhaust system should be: Question Parts of an exhaust system should be: Answers Loose. Leaking. Fastened securely. Cracked. 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: Maryland Passenger Minnesota Class A Knowledge Test New Jersey Class A Knowledge Test New Jersey Class B Knowledge Test Wyoming Passenger