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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. When the wheels of a trailer lock up:
the vehicle will gradually come to a complete stop.
the trailer will tend to swing around.
ABS will increase stopping power.
All of the above.
2. If your vehicle is equipped with air brakes, loss of air pressure in the emergency line will cause:
the vehicle to slide back and forth.
the springs to put on the brakes.
the trailer supply valve to open.
the trailer emergency brakes to come on.
3. Which of the following is most likely to roll over?
The rear trailer of a triple
The middle trailer of a triple
The rear trailer of a double
The front trailer of a double
4. The trailer hand valve should:
never be used to test the trailer brakes.
be used in driving.
never be used for parking.
All of the above.
5. Before entering an intersection, make sure that:
accelerate smoothly and change gears as necessary.
there is sufficient space to clear it.
there's enough room to get at least halfway across.
That there is enough room for the rear of your vehicle to clear the stop line on your side.
6. When driving in very hot weather, the heat will increase the chances of:
suspension system defects.
ABS malfunction.
loss of hydraulic pressure.
tire failure.
7. Before connecting the converter dolly to the rear trailer, make sure that:
the shut-off valves at the rear of the first trailer are open.
the trailer height is slightly lower than the center of the fifth-wheel.
the locking jaws rest on the kingpin.
the kingpin rests on the fifth-wheel.
8. Empty trucks have the best braking. True or False?
It depends on the cargo.
It depends on the truck.
9. When you make a quick lane change, the crack-the-whip effect can turn the trailer over. The crack-the-whip effect is caused by:
strong wind.
rearward amplification.
the rear trailer of a triple.
worn tire tread.
10. Hanging meat in a refrigerated truck can be:
a very stable load with a low center of gravity.
a very unstable load with a high center of gravity.
a very stable load if properly distributed.
a very unstable load with a low center of gravity.
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KS 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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