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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 Wyoming doubles triples test consists of 20 questions. To pass, you must correctly answer at least 16 questions (80%). The WY CDL doubles triples test covers the following sections of the Wyoming CDL Manual: Driving Safely, Air Brakes (if you plan to operate vehicles equipped with air brakes), Combination Vehicles, Doubles and Triples. Take this WY CDL practice test now to prepare for the actual test!
1. To prevent rollover, you should:
place the cargo near the rear of the trailer.
place the cargo near the front of the trailer.
keep the cargo as close to the ground as possible.
put the lightest parts of the cargo under the heaviest parts.
2. When driving trucks with trailers, drivers should:
push the brake pedal to the floor when braking.
make quick lane changes.
decrease their following distance.
avoid making sudden movements with the steering wheel.
3. 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:
keep backing up.
turn the wheel more  in the direction you want to go.
turn the wheel the other way to follow the trailer.
None of the above.
4. When driving a double or triple, you should:
decrease your following distance.
increase your following distance.
drive with emergency flashers on.
drive in the left lane whenever possible.
5. While crossing railroad tracks, you should:
shift down.
shift up.
not shift gears.
stop, then look and listen for the train.
6. If your vehicle thumps or vibrates heavily, it may be a sign that:
the engine belt is loose.
one of the tires has gone flat.
you need to shift up.
the brakes have failed.
7. When should you downshift automatic transmissions?
When going down steep grades.
When you want to go faster.
Watch your tachometer, and downshift when your engine reaches the top of the range.
When you start to get drowsy.
8. Radial and bias-ply tires:
should be used together.
should be used together only during bad weather.
should not be used together.
should be used together only when driving in packed snow.
9. If you are feeling sleepy, you should:
pull off the road and rest or take a nap.
slow down and drive on the shoulder of the road.
increase your speed to get to the destination quicker.
None of the above.
10. Which of the following statements about traveling alongside other vehicles is true?
You should avoid traveling next to other vehicles whenever possible.
You should travel next to other vehicles whenever possible.
You should never drop back or pull forward to make sure the other driver can see you.
None of the above.
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Doubles Triples WY CDL 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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