Ohio CDL Air Brakes Test case studies
Ohio CDL Air Brakes Test · Put your knowledge to work in context.
The Ohio CDL Air Brakes Test is the knowledge exam a driver must pass to operate a commercial vehicle equipped with air brakes and to have the air brake restriction removed from a CDL. It is aimed at drivers seeking or upgrading a Class A or Class B license, and at drivers who currently hold a CDL with an air brake restriction and want it lifted. The Ohio CDL Air Brakes Test case studies are 5 cases and about 2,872 words.
1Primary Circuit Pressure Loss on a Loaded Combination
You are driving a loaded 5-axle tractor-trailer, grossing about 78,000 lb, on a two-lane Ohio state route. The tractor has dual air-pressure gauges: primary (rear service circuit) reads 105 psi and secondary (front service circuit) reads 110 psi.
635 words, about 3 min2Failed Static Leak and Late Low-Pressure Warning After Shop Work
You are doing a pre-trip inspection on a single-unit straight truck with air brakes after a shop replaced a compressor discharge line. The engine has been running long enough to charge the system.
575 words, about 3 min3Applied Leakage and Tractor Protection Valve Failure After a Trailer Swap
After swapping trailers at a terminal, you perform the air brake tests on a 3-axle tractor with a 2-axle van trailer. The system charges to 120 psi and the governor cuts out.
569 words, about 3 min4Brake Fade on a Steep Downgrade With Traffic Behind
You are descending a 6% grade on an Ohio river bridge approach with a 40,000 lb payload in a 5-axle tractor-trailer. The posted truck speed is 25 mph.
566 words, about 3 min5ABS Lamps Stay On Before a Wet 180-Mile Run
You are assigned a tractor-trailer for a 180-mile run on a rainy morning. During the pre-trip, the tractor ABS lamp comes on during the bulb check and stays on after you drive forward at 5 mph.
527 words, about 3 min