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Safely pulling double and triple trailers requires knowledge and skill. If you want to pull double or triple trailers, you must add the Doubles/Triples (T) endorsement to your Class A CDL. The Kansas doubles triples test consists of 20 questions. To pass, you must correctly answer at least 16 questions (80%). The KS CDL doubles triples test covers the following sections of the Kansas CDL Manual: Driving Safely, Air Brakes (if you plan to operate vehicles equipped with air brakes), Combination Vehicles, Doubles and Triples. Take this KS CDL practice test now to prepare for the actual test! Important: Triple trailers are not legal in Kansas.
1. When driving a double or triple, you should:
increase your following distance.
decrease your following distance.
drive in the left lane whenever possible.
drive with emergency flashers on.
2. The heavier the vehicle:
the less work the brakes must do to stop it.
the more work the brakes must do to stop it.
the higher the center of gravity will be.
None of the above.
3. If there is a fire in your vehicle, do NOT:
notify emergency services.
park in an open area.
park away from buildings and other vehicles.
pull into a service station.
4. Which of the following statements is true?
Carrying a properly charged and rated fire extinguisher will help prevent fires.
Under-inflated tires will NOT cause a vehicle fire.
There is no way that short circuits due to damaged insulation can cause a vehicle fire.
Poor cargo ventilation is a common cause of fire.
5. When driving a 60-foot truck at 50 mph, your minimum following distance should be:
7 seconds
6 seconds
5 seconds
3 seconds
6. At dawn, dusk, in rain or snow, to make yourself easier to see you should:
use the low beams.
use the high beams.
use the emergency flashers.
use the parking lights.
7. No matter how small the cargo is, it should have at least:
1 tie-down.
4 tie-downs.
6 tie-downs.
2 tie-downs.
8. Another name for front-end header boards is:
cargo stopper.
headache racks.
containerized racks.
head belt.
9. If you doubt you have enough space to pass under a bridge, you should:
drive faster.
turn on your headlights.
go slowly.
turn on your 4-way emergency flashers.
10. When backing a trailer, you should turn the steering wheel to the right to make the trailer go left (or vice versa). Once the trailer starts to turn, you should:
turn the wheel the other way to follow the trailer.
keep backing up.
turn the wheel moreĀ  in the direction you want to go.
None of the above.
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KS CDL Doubles Triples Test

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