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Drivers who want to drive combination vehicles must pass the combination vehicles test. The Kansas CDL combination test consists of 20 questions, and you'll need at least 16 correct answers to pass (80%). The test covers the combination vehicles section of the Kansas CDL Manual. Take this practice test now to prepare for the actual KS CDL combination test!
1. If the spring brakes do not release when you push the trailer air supply control, you should:
check the electrical cables.
pump the brakes.
rev or lug the engine.
check the air line connections.
2. When inspecting the cargo, make sure it is:
secured properly for the first 50 miles after beginning a trip.
not overloaded.
piled up.
All of the above.
3. Which of the following is NOT part of the procedure to raise the landing gear?
Using the low range gear, if equipped, to begin raising the landing gear
Using the high range gear, if equipped, to begin raising the landing gear
Safely securing the crank handle, after raising the landing gear
Raising the landing gear all the way up
4. For a cargo fire in a box trailer, you should:
wait 10 minutes before opening the doors.
open the doors immediately and use the fire extinguisher.
keep the doors shut.
use the fire extinguisher on the doors.
5. When uncoupling a trailer, after shutting off the trailer air supply to lock the trailer brakes, you should:
inspect the trailer supports.
back up gently to ease the pressure on the fifth-wheel locking jaws.
pull the tractor forward until the fifth-wheel comes out from under the trailer.
immediately apply your tractor parking brakes.
6. The trailer hand valve should be used only:
only in combination with the foot brake.
when the trailer is fully loaded.
in driving to prevent skids.
to test the trailer brakes.
7. What is the emergency air line for?
It supplies air to the trailer air tanks, and controls the emergency brakes on combination vehicles.
It tells you the amount of brake pressure you need to stop the vehicle.
It controls theĀ front brakes of the tractor in case of an emergency.
All of the above.
8. If you must stop on a one-way or divided highway, you should place warning devices _______ toward the approaching traffic.
5, 25 and 50 feet
5, 50 and 500 feet
3, 15 and 45 feet
10, 100 and 200 feet
9. Before entering a curve, you should:
come to a complete stop.
reduce your speed.
maintain your speed.
increase your speed.
10. Inspecting the fifth-wheel does NOT include:
making sure that the fifth wheel is in the proper position for coupling.
backing until the fifth-wheel just touches the trailer.
checking that there are no cracks in the frame.
checking for missing or damaged parts.
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KS CDL Combination Test

Number of questions: 20
Correct answers to pass:16
Passing score:80%
Number of questions: 20
Correct answers to pass:16
Passing score:80%
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