KS CDL Air Brakes case studies
KS CDL Air Brakes · Put your knowledge to work in context.
The air brakes knowledge test is the Kansas CDL section that determines whether you are allowed to operate a vehicle equipped with air brakes. It is required for drivers of tractor-trailers, dump trucks, buses, and heavy straight trucks whose braking systems use compressed air rather than hydraulic fluid, and it is taken in addition to the general CDL knowledge test. In Kansas, adding the air brakes restriction removal or endorsement is handled through the state's driver licensing program, and the current testing details are published by the Kansas Department of Revenue's Division of Vehicles. The exam checks whether you understand the parts of an air brake system, how a dual-circuit system protects you when one side fails, how to inspect the system before a trip, how to brake normally on grades and in traffic, what to do when pressure drops or a brake fails, and how to keep the system maintained. The KS CDL Air Brakes case studies are 5 cases and about 2,703 words.
1Late Warning, Late Spring Brakes, and a Trailer Service-Line Leak
Your 2019 Freightliner Cascadia day cab is hooked to a loaded 53-foot dry van, gross weight about 78,000 lb. During the pre-trip you build pressure to 125 psi and the governor cuts out.
588 words, about 3 min2Cold-Morning Build Time and Oil at the Dryer Purge
On a 28°F morning in Wichita, you start a 2007 Kenworth T800 with a 475-hp diesel and a 10-speed manual. The air system is at 60 psi after sitting all night.
556 words, about 3 min3Brake Fade on a Six-Percent Grade
Your 80,000-lb combination is descending a 6% grade on I-70 west of Salina. The grade is posted 2 miles long.
530 words, about 3 min4Right-Front Drag and a Slow-Releasing Trailer Relay Valve
After a 200-mile run in light rain, you stop at a Kansas DOT scale on US-81. A trooper asks you to do a brake check.
518 words, about 3 min5Empty Alcohol Evaporator, Frozen Gladhands, and a Jug of Washer Fluid
It is January, 14°F, in western Kansas. Your 2015 Peterbilt 579 with a 72-inch sleeper has sat outside for two days.
511 words, about 3 min