Vehicle Inspection (Pre-Trip Inspection) - CDL Manual Section 11M
Section 11M tests whether you can perform a complete pre-trip inspection of a passenger-carrying commercial vehicle and explain what you are checking. The examiner is not asking for a quick walk-around; you must demonstrate a consistent sequence, name each component, state its safe condition, and point out defects that would place the vehicle out of service.
Build a repeatable sequence
Start with the engine off and the vehicle parked on level ground. Open the hood and check engine oil, coolant, power-steering fluid, belts, hoses, battery securement, and obvious leaks. Then walk the exterior: lights and reflectors, mirrors and brackets, windshield, wipers, tires and tread, sidewalls, valve stems, rims, lug nuts, hubs, brake chambers and hoses, suspension, mud flaps, body panels, frame, exhaust, and passenger doors. Check the aisle, steps, handrails, emergency exits, roof hatches, fire extinguisher, first-aid kit, and emergency reflectors. In the cab, check seat and belt, horn, gauges, defroster, wipers, parking brake, service brake, and steering play. On air-brake vehicles, perform the static leak, applied leak, low-air warning, and spring-brake checks in the manual's order.
Worked example
Asked to inspect a left rear dual assembly, do not just say “tire okay.” Say: “I am checking tread depth, sidewall cuts or bulges, valve stem, rim cracks, lug nuts for looseness or rust streaks, hub oil level, brake chamber, and clearance. The tread is above the minimum, no cords are exposed, and all lugs are present and tight.” That gives the examiner evidence for each scored item.
Traps that cost marks
Skipping the verbal explanation, inspecting only one side, forgetting passenger safety equipment, failing to check brake lights with a helper, and calling a defect without saying why it matters. Use a flashlight and do not crawl under the vehicle.