View instructions
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 Alaska doubles triples test consists of 20 questions. To pass, you must correctly answer at least 16 questions (80%). The AK CDL doubles triples test covers the following sections of the Alaska CDL Manual: Driving Safely, Air Brakes (if you plan to operate vehicles equipped with air brakes), Combination Vehicles, Doubles and Triples. Take this AK CDL practice test now to prepare for the actual test!
1. Which of the following will NOT help you prevent rollover?
Using the controlled braking method.
Keeping the cargo as close to the ground as possible.
Driving slowly around turns.
2. When the temperature drops:
bridges will not freeze.
bridges usually freeze after other parts of the roadway.
bridges will freeze before the road will.
3. Foundation brakes are used:
only with the front wheels.
only with the right wheels.
at each wheel.
4. If you go twice as fast, your stopping distance will increase by:
eight times.
two times.
four times.
5. To reduce driver distraction, you should do all of the following except:
Plan your route before driving
Pre-program radio stations
Eat while driving.
6. Older trailers do not have spring brakes. If the air supply leaks away:
there will be no emergency brakes.
the trailer will stop normally.
the ABS won't work properly.
7. 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:
turn the wheel the other way to follow the trailer.
turn the wheel more  in the direction you want to go.
keep backing up.
8. When a tire fails, you should:
brake in a way that will keep your vehicle in a straight line.
push the brake pedal down gradually.
stay off the brake.
9. Which of the following is not a type of retarder?
10. When driving a double or triple:
the more heavily loaded trailer should be in the rear.
all trailers should have the same weight.
the more heavily loaded trailer should be directly behind the tractor.
Page 1 of 2
Next page

AK Doubles Triples CDL Test

Number of questions: 20
Correct answers to pass:16
Passing score:80%
Share This Online CDL Test
Rate this Doubles Triples CDL Test
4.8 out of 5
based on 313 votes