Which of the following is not a reason for exhaust system rejection during inspection?

The reason that the exhaust system performs effectively is significant because it directly suggests that there are no issues present that would justify a rejection during inspection. An exhaust system that operates as intended means there are no leaks, excessive noise, or obstructions, all of which would typically be causes for concern in terms of safety and emissions compliance.

On the other hand, loose, broken, or missing brackets, a cracked manifold causing leakage, and holes or patched areas in the system are all serious defects that can compromise the functionality of the exhaust system, leading to potential safety hazards and environmental concerns. Each of these issues suggests a failure in the structural integrity or operational effectiveness of the exhaust system, which is why they would lead to a rejection during inspection. The presence of any of these faults indicates that the exhaust system may not perform its critical role in directing harmful gases away from the vehicle and the occupants safely.