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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. Air tank drains:
protect the tanks and the rest of the system from too much pressure.
should not be used in wet weather.
are used to remove water and oil from the air tanks.
are used to move air to the brakes.
2. Brake lag is:
the distance your vehicle will travel, in ideal conditions, while you are braking.
the time required for the air brakes to work after the brake pedal is pushed.
the amount of air pressure required to stop the vehicle.
the distance your vehicle will continue to travel, in ideal conditions, before you hit the brakes.
3. Emergency brakes are:
not required on doubles.
not required on commercial vehicles with air brakes.
not required on buses.
required on all vehicles.
4. For safety during a trip, you should:
use your senses to check for problems.
watch gauges for signs of trouble.
check critical items when you stop.
All of the above.
5. If the drive wheels start to skid:
accelerate slightly to regain control.
push in the clutch to let them turn freely.
use the brakes to slow down.
All of the above.
6. To prevent rollover, you should:
put the lightest parts of the cargo under the heaviest parts.
keep the cargo as close to the ground as possible.
place the cargo near the front of the trailer.
place the cargo near the rear of the trailer.
7. You as a driver should always:
make emergency plans when you see a hazard.
reduce your following distance.
drive slowly in the left lane of traffic.
stay in your lane.
8. If your trucks has a high center of gravity, which of the following is true for curves?
You should slow down, as your truck can roll over at the posted speed limit for the curve.
You should travel at the posted speed limit.
Reduce your speed to a crawl.
None of the above.
9. With an engine fire, you should NOT:
turn the engine off as soon as possible.
open the hood.
shoot foam from the vehicle’s underside.
None of the above.
10. Texting while driving a CMV is:
safer than talking on the phone.
acceptable if the message work-related.
acceptable if the message less than 140 characters.
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CT CDL Doubles Triples 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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