Vehicle Inspection
Vehicle Inspection tests the pre-trip and basic brake checks that must be done before driving. The exam expects a systematic walk-around, not a quick glance.
Core rules
- Check the engine compartment: fluids, belts, hoses, battery securement, and leaks.
- Walk around the vehicle: lights, reflectors, tires, wheels, lug nuts, mud flaps, and body damage.
- Check tire tread and damage. Front steer tires need at least 4/32 inch tread; other tires need at least 2/32 inch. Look for cuts, bulges, and exposed cords.
- Test service brakes, parking brake, and air-brake leakage. Check that lights and turn signals work.
- On a combination, inspect the fifth wheel, kingpin, air lines, landing gear, and trailer frame.
Worked example
A front steer tire measures 3/32 inch tread. The tire fails inspection because steer tires require at least 4/32 inch. A rear tire at 3/32 inch would pass the 2/32 inch minimum but still needs a damage check. Reasoning: the steer-axle standard is stricter because a front-tire failure is harder to control.
Traps
Checking only one side of the vehicle; forgetting the brake lights and turn signals; and assuming a tire with correct tread has no sidewall damage.