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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 Rhode Island doubles triples test consists of 20 questions. To pass, you must correctly answer at least 16 questions (80%). The RI CDL doubles triples test covers the following sections of the Rhode Island CDL Manual: Driving Safely, Air Brakes (if you plan to operate vehicles equipped with air brakes), Combination Vehicles, Doubles and Triples. Take this RI CDL practice test now to prepare for the actual test!
1. When parked on the side of the road, you should:
flash your brake lights.
turn off all lights.
use the 4-way emergency flashers.
2. You are driving on a steep downgrade in the proper low gear. Your "safe" speed is 40 mph. When your speed reaches 40 mph, you should:
apply the brakes to quickly reduce your speed to 25 mph, and then release the brakes.
apply the brakes to gradually reduce your speed to 35 mph, and then release the brakes.
increase your speed to approximately 45 mph, and then apply release the brakes.
3. Empty trucks:
require shorter stopping distances than fully-loaded trucks.
have better traction than fully-loaded trucks.
may have poor traction.
4. For a cargo fire in a box trailer, you should:
keep the doors shut.
wait 10 minutes before opening the doors.
open the doors immediately and use the fire extinguisher.
5. If the safety relief valve in the air brake system releases air:
the valve is fully operational.
something is wrong.
this will supply more power to the brakes.
6. Which of the following is a good way to avoid becoming an aggressive driver?
Keep your following distance reasonable.
Be realistic about your travel time.
All of the above.
7. You should do an after-trip inspection:
once a month.
at least once a week.
after each trip.
8. When the spring brakes are on, you should:
pump the brakes.
press the accelerator.
not push the brake pedal down.
9. When driving a double or triple, you should:
decrease your following distance.
increase your following distance.
drive in the left lane whenever possible.
10. Most heavy-duty vehicles use:
hydraulic brakes.
air brakes.
solid brakes.
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RI CDL Doubles Triples Test

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