Oklahoma CDL General Knowledge case studies
Oklahoma CDL General Knowledge · Put your knowledge to work in context.
The Oklahoma CDL General Knowledge test is the written knowledge exam that anyone applying for a Commercial Driver License in Oklahoma must pass before moving on to the skills and road portions of licensing. It is designed for drivers who intend to operate Class A, Class B, or Class C commercial vehicles - tractor-trailers, straight trucks, tank vehicles, and certain passenger or hazardous materials operations - and it tests whether you understand the safety rules and vehicle systems that apply across all of them. The Oklahoma CDL General Knowledge case studies are 5 cases and about 2,887 words.
1Pressure Fade on a 6% Grade Near Henryetta
on a 96°F afternoon, a driver tops a 6% grade on I-40 east of Henryetta at 55 mph. The rig is a 2020 three-axle tractor pulling a 53-foot van, scaled at 78,500 lb.
631 words, about 3 min2Six Pipes, Four Chains, and a 12,000-lb WLL Question
At a lumber yard in Tulsa, a driver is loading twelve 40-foot steel pipes, each 8 inches in diameter, side by side on a flatbed. The load weighs 24,000 lb.
548 words, about 3 min3Right Turn at a Tight Oklahoma City Fuel Island
At a truck stop near Oklahoma City, a driver is pulling a 53-foot van with a 230-inch tractor wheelbase. He wants to turn right from a 14-foot fuel lane into a 12-foot exit lane.
576 words, about 3 min4A Leaking Drum and an 18-Mile Decision
At a rest area on I-35 near Pauls Valley, a driver hauling a placarded load stops for a break. The load includes twelve 55-gallon drums of UN 3264, Corrosive liquid, acidic, inorganic, n.o.s., Class 8.
585 words, about 3 min5Pre-Trip After a Shop Repairs the Steer Axle
After a shop replaces a steer tire and adjusts the brakes on a 2018 tractor, a driver performs a pre-trip inspection before a 300-mile run. He finds steering wheel free play of about 30 degrees; left steer tire tread at 5/32 inch; right steer tire tread at 4/32 inch; a cut in the right steer tire sidewall deep enough to expose cord; trailer brake pushrod travel of 2.5 inches on a type 30 chamber; an air pressure loss of 4 psi per minute with the engine off and the brakes released; and a brake light that stays on.
547 words, about 3 min