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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 Connecticut doubles triples test consists of 20 questions. To pass, you must correctly answer at least 16 questions (80%). The CT CDL doubles triples test covers the following sections of the Connecticut CDL Manual: Driving Safely, Air Brakes (if you plan to operate vehicles equipped with air brakes), Combination Vehicles, Doubles and Triples. Take this CT CDL practice test now to prepare for the actual test!
1. Emergency equipment is:
only required when transporting hazardous materials.
2. Glad hands are:
securement devices.
electronic devices.
warning devices.
coupling devices.
3. To reduce driver distraction, you should do all of the following except:
Pre-program radio stations
Adjust mirrors before driving
Eat while driving.
Plan your route before driving
4. When driving in heavy traffic, the safest speed is:
half the speed of the other vehicles.
faster than the other vehicles.
the same speed as the other vehicles.
slower than the other vehicles.
5. 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.
6. If you are caught in strong winds, you should:
keep a strong grip on the steering wheel and slow down or pull off the roadway.
immediately take your foot off the accelerator.
speed up while keeping a strong grip on the steering wheel.
None of the above.
7. Your vehicle has air brakes. To stop, you should:
pull the parking brake control knob out.
push the brake pedal down.
release the accelerator, push in the clutch, and shift to Neutral at the same time.
pump the brake pedal 3 times.
8. If the engine catches fire, you should:
open the hood as soon as you can.
pull into a service station and notify the emergency services.
avoid shooting foam from the vehicle's underside.
turn off the engine as soon as you can.
9. If you cannot make a right turn without entering another traffic lane, you should:
turn wide before you start the turn.
swing wide to the left before starting the turn.
turn wide as you complete the turn.
watch out for vehicles coming toward you and back up for them.
10. When driving double and triple trailers, drivers should:
steer gently and go slowly around corners.
allow more following distance.
look far ahead.
All of the above.
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CT CDL Doubles Test

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