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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. If you hear a loud loud "bang" and the steering feels "heavy", you should:
hold the steering wheel firmly and stay off the brake.
pump the brakes until the vehicle has slowed down.
check your rearview mirrors to see if you have a flat tire.
brake hard and pull off the road.
2. Pre-trip inspections of doubles and triples should:
be done once a week.
be done by the shipper.
take less time than inspecting straight trucks.
take more time than inspecting straight trucks.
3. You are driving a double. Before entering traffic, you should:
make sure you have a large enough gap before entering or crossing traffic.
turn on your headlights.
always come to a complete stop.
assume there is enough room to merge into traffic.
4. Longer combination vehicles have the tendency to swing wide on turns. This is called:
5. Your vehicle has hydraulic brakes. When you press the brake pedal while driving and the pedal goes to the floor, remember that:
shifting into neutral may help slow the vehicle.
pumping the brake pedal may generate enough hydraulic pressure to stop the vehicle.
the parking brake should never used to slow the vehicle.
All of the above.
6. What factors can cause brakes to fade?
Gravel and tar.
Dirt roads and in unpaved yards.
Excessive heat and brakes out of adjustment.
Slippery surfaces and shaded areas.
7. Having ABS on only the trailer:
makes the trailer more likely to roll over.
is very dangerous.
makes the trailer more likely to swing out.
still gives you more control over your vehicle during braking.
8. If your brakes fail on a steep mountain downgrade, you should:
use an escape ramp if it is available.
go right if the shoulder is clear.
leave the road immediately.
change lanes after making sure there is enough room.
9. Emergency equipment is:
only required when transporting hazardous materials.
10. _________ rigs are much more likely to roll over in an accident than _________ rigs.
Empty ; fully loaded
Fully loaded ; overloaded
Empty ; overloaded
Fully loaded ; empty
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KS CDL Doubles Triples 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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