AK CDL Combination Practice Test (2024)

1. When backing a trailer on a curved path you should back towards:

the driver's side.
either side.
neither side (back up straight).

2. When you get ready to back under the semi-trailer, you should:

line up directly in front of the trailer.
back under the trailer at an angle to avoid pushing the trailer sideways.
line up about 15 degrees off the line of the trailer.

3. If you're feeling tired while driving you should:

eat something.
drink coffee.
stop driving and get some rest.

4. Which of the following may have reduced the clearances since the heights were posted at bridges and overpasses?

5. If the ABS is not working:

the vehicle will have no brakes.
the vehicle will have weak brakes.
you still have normal brake functions.

6. Before leaving your vehicle unattended, you should:

7. Dual tires:

should come in contact with each other whenever possible.
should always come in contact with each other.
should not come in contact with each other.

8. Dollies with ABS are required to have a malfunction lamp:

9. In vehicles with air brakes, the tractor protection valve:

keeps air in the tractor or truck brake system.
provides the air pressure used to operate trailer brakes.
carries air, which is controlled by the trailer hand brake or the foot brake.

10. Antifreeze:

helps the engine under hot conditions as well as cold conditions.
helps the engine only under hot conditions.
helps the engine only when the temperature is below freezing.

CDL COMBINATION PRACTICE TEST (AK)