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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. Too little weight on the driving axles can cause:
mechanical damage.
longer stopping distances.
poor traction.
poor visibility.
2. Having ABS on only the trailer:
makes the trailer more likely to roll over.
still gives you more control over your vehicle during braking.
is very dangerous.
makes the trailer more likely to swing out.
3. In vehicles with air brakes, the two markings on a front brake limiting valve are:
high and low.
wet and dry.
left and right.
normal and slippery.
4. Which of the following statements about backing heavy vehicles is true?
The helper should stand where you cannot see the helper.
You should avoid backing whenever you can.
Always back as quickly as possible.
Back to the right side so that you can see better.
5. When driving at night you should dim your lights when following another vehicle within:
500 feet.
50 feet.
100 feet.
1 mile.
6. For safety during a trip, you should:
watch gauges for signs of trouble.
check critical items when you stop.
use your senses to check for problems.
All of the above.
7. Which of the following will NOT help you prevent rollover?
Using the controlled braking method.
Driving slowly around turns.
Keeping the cargo as close to the ground as possible.
All of the above.
8. Containerized loads are used:
when the cargo exceeds the weight limit.
when transporting explosives.
when transporting liquids.
when the cargo has been or will be carried by rail or ship.
9. When driving at night, you should use ________ when you can.
low beams
indicator lights
high beams
emergency flashers
10. After the pre-trip inspection, drivers should inspect their cargo and its securing devices again within ________ after beginning the trip.
two hours
25 miles
20 miles
50 miles
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WY Doubles Triples 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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