Kentucky CDL Combination case studies
Kentucky CDL Combination · Put your knowledge to work in context.
The Kentucky CDL Combination Vehicles knowledge test is the additional written exam a driver must pass - on top of the General Knowledge test - to obtain a Class A commercial driver's license that authorizes operating tractor-trailers, truck-and-trailer combinations, and similar articulated units. It is written for drivers who plan to pull a trailer for a motor carrier, an agricultural or construction operation, or their own business, and who therefore need to demonstrate combination-specific knowledge rather than general vehicle knowledge alone. The Kentucky CDL Combination case studies are 5 cases and about 2,822 words.
1Coupling a Nose-Down Trailer on Gravel
You are picking up a loaded 53-foot dry van at a Kentucky distribution center. The trailer sits on gravel, and its landing gear is on a slight rise, so the trailer is nose-down and the kingpin looks about one inch lower than the fifth-wheel ramp.
643 words, about 3 min2Combination Air-Leak Test at the Terminal
During a pre-trip on a three-axle tractor and a two-axle trailer, you build air pressure to 120 psi and shut the engine off. With the parking brake released, the gauge falls from 120 to 117 psi in one minute.
580 words, about 3 min3Tractor ABS Lamp Stays On in Rain
You are assigned a 2019 tractor and a 2016 trailer for a 40-mile delivery in light rain. During the pre-trip, the tractor ABS lamp comes on at key-on and stays on after you drive forward at 8 mph in the yard.
520 words, about 3 min4Loaded Van on a Tightening Ramp
You are driving a 53-foot van loaded with 44,000 pounds of bottled water. The load is stacked to 100 inches and is not braced front-to-back; there is a 6-inch gap at the rear.
549 words, about 3 min5Right Turn Blocked by a Car in the Swing Lane
You are driving a 75-foot combination (tractor plus 53-foot trailer) in a Kentucky city. You need to turn right from the right lane of a three-lane one-way street into a two-lane two-way street.
530 words, about 3 min