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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 Arkansas doubles triples test consists of 20 questions. To pass, you must correctly answer at least 16 questions (80%). The AR CDL doubles triples test covers the following sections of the Arkansas CDL Manual: Driving Safely, Air Brakes (if you plan to operate vehicles equipped with air brakes), Combination Vehicles, Doubles and Triples. Take this AR CDL practice test now to prepare for the actual test!
1. If your vehicle thumps or vibrates heavily, it may be a sign that:
you need to shift up.
the engine belt is loose.
one of the tires has gone flat.
the brakes have failed.
2. You are driving a vehicle with air brakes when the low air pressure warning light and buzzer come on. You should:
pull off the road and stop immediately.
slow down and test your brakes.
activate your hazard lights and drive to the nearest place where you can stop.
apply the brakes as hard as you can.
3. Which of the following statements about backing heavy vehicles is true?
The helper should stand where you cannot see the helper.
Back to the right side so that you can see better.
Always back as quickly as possible.
You should avoid backing whenever you can.
4. A trailer jackknife is more likely to happen when the trailer is:
empty.
loaded to its full capacity.
overloaded.
None of the above.
5. An alcohol evaporator:
used to reduce the chance of the front wheels skidding.
to hold compressed air.
protects the air brake system from too much pressure.
is used to reduce the risk of ice in air brake valves and other parts during cold weather.
6. You must have at least 4/32 inch tread depth in every major groove on front tires and at least ___ inch on other tires.
3/32
4/32
1/32
2/32
7. Cargo should be properly covered:
to block your view or someone else’s.
to protect people from spilled cargo.
to protect the weather from the cargo.
All of the above.
8. When driving with more than one trailer, the _______ trailer should be the first one behind the tractor.
longest
heaviest
lightest
shortest
9. Which of the following statements about doubles/triples is true?
A safe speed on a curve for a single trailer combination vehicle may be too fast for a double/triple.
Doubles/triples may have to go faster around corners than single trailer combination vehicles.
Doubles/triples are more stable than other CMVs.
All of the above.
10. If your ABS fails:
you will still have normal brake functions.
your tires might grab unexpectedly and you could lose control.
the first step is to get the vehicle off the road and stop.
you will have no brake function, and could lose control.
 
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AR Doubles Triples Test

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