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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. To prevent rollover, you should:
drive slowly around corners.
turn the engine off while turning.
drive in the left lane.
drive on the shoulder of the road when possible.
2. With an engine fire, you should:
not shoot foam from the vehicle’s underside.
open the hood as soon as possible.
turn the engine off as soon as possible.
All of the above.
3. If you hear a loud loud "bang" and the steering feels "heavy", you should:
pump the brakes until the vehicle has slowed down.
brake hard and pull off the road.
hold the steering wheel firmly and stay off the brake.
check your rearview mirrors to see if you have a flat tire.
4. If you have to drive off the road, you should:
leave the road completely.
brake as hard as you can to maintain control.
fully apply the brakes until your speed has dropped to about 20 mph.
keep one set of wheels on the pavement, if possible.
5. When should you downshift automatic transmissions?
When going down steep grades.
When you start to get drowsy.
Watch your tachometer, and downshift when your engine reaches the top of the range.
When you want to go faster.
6. How can you tell if a converter dollie has ABS?
There is an ABS system on the right side of the dolly.
There is a red lamp on the left side of the dolly.
There is an ABS plaque on the right side of the dolly.
There is a yellow lamp on the left side of the dolly.
7. During freezing weather, which area is most likely to be slippery after it rains?
Roads that look wet.
Shaded areas.
All of the above.
8. When driving in hot weather, drivers should inspect tires:
every 4 hours or every 200 miles.
every 3 hours or every 75 miles.
every hour or every 50 miles.
every 2 hours or every 100 miles.
9. Rims with welding repairs:
can be used for tires in the front of the vehicle.
are acceptable only when carrying a heavy load.
can be used for tires in the rear of the vehicle.
are not safe.
10. The posted speed for a curve that may be safe for a straight truck:
is never safe for a double or triple.
could be too fast for a double or triple.
can be ignored when driving a double or triple.
is likely to be safe for a double or triple.
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CT CDL Doubles Triples Test

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