During a pre-trip, what should you look for in the exhaust system?

• A. Cracked engine block.
• B. Worn tires.
• C. Low brake fluid.
• D. Leaks, broken supports, and signs of excessive rust.

Answer: (D)

During a pre-trip, you’re checking the exhaust system for conditions that can affect safety and emissions. The best indicators are leaks, broken supports, and signs of excessive rust. Leaks mean exhaust gases could escape into the cab or under the vehicle, posing carbon monoxide risks and potential fire hazards if hot exhaust touches nearby fuel or insulation. Broken supports can cause the exhaust to sag, rattle, or detach, leading to additional damage and road hazards. Excessive rust weakens components, making holes or breaks more likely as you drive. The other items listed aren’t part of the exhaust inspection: a cracked engine block is an engine issue, worn tires pertain to the wheel area, and low brake fluid concerns the braking system.