What is the most serious immediate danger from a damaged exhaust system?
Correct answer: B – Poisonous fumes may enter the cab or sleeper berth
A broken or leaking exhaust system can allow poisonous fumes into the cab or sleeper berth. Drivers should inspect for damaged pipes, mufflers, stacks, brackets, and other leaking components. This defect creates a direct health risk to anyone inside the vehicle and must not be ignored.
Source: Connecticut Commercial Driver’s License Manual — § 2.1.3, “Exhaust System Defects”



