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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 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. Strong winds can make it difficult to stay in your lane especially when driving:
vehicles with ABS.
heavier vehicles.
lighter vehicles.
2. To avoid becoming an aggressive driver you should:
give other drivers your full attention.
give other drivers the benefit of the doubt.
make gestures to other drivers.
3. When driving in heavy traffic, the safest speed is:
slower than the other vehicles.
faster than the other vehicles.
the same speed as the other vehicles.
4. Containerized loads are used:
when the cargo has been or will be carried by rail or ship.
when the cargo exceeds the weight limit.
when transporting liquids.
5. You are driving a vehicle with air brakes when the low air pressure warning light and buzzer come on. You should:
activate your hazard lights and drive to the nearest place where you can stop.
pull off the road and stop immediately.
slow down and test your brakes.
6. When you push in the red trailer air supply knob, this will:
open the emergency line shut-off valve at the rear of the last trailer.
disconnect the air lines from the trailer.
supply air to the emergency supply lines.
7. The best advice for driving in fog is:
don't drive.
use low beams.
use high beams.
8. To prevent a rollover, the driver should:
make quick lane changes if possible.
drive on the shoulder if possible.
drive slowly around corners, on ramps, and off ramps.
9. Tire load is defined as:
the minimum safe weight a tire can carry at a specified pressure.
the maximum safe weight a tire can carry at a specified pressure.
the weight transmitted to the ground by 1 tire.
10. On dry pavement, the braking distance when traveling at 55 mph is about:
419 feet.
142 feet.
216 feet.
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AK CDL Doubles Triples Test

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