FREE AK CDL Combination Test - Practice Test 2025

1. When approaching a vehicle with a distracted driver, you should:

quickly pass the vehicle.
maintain your safe following distance.
change lanes quickly.

2. The crack-the-whip effect:

can cause a vehicle to tilt.
the ends of some vehicles to drag.
can turn the trailer over.

3. Most heavy trucks with manual transmissions require ____ to change gears.

4. Which of the following is NOT part of checking the sliding fifth-wheel?

Checking that it is properly greased
Testing the tractor protection valve
Checking that all locking pins are present and locked in place

5. When parking a trailer without spring brakes, it is very important for safety that you use wheel chocks. Why?

if you don't use wheel chocks, supply air will be sent to the service line instead of going to charge the trailer air tanks.
The air could leak out of the trailer air tank, releasing its emergency brakes.
You may not notice a major leak in the service line until you try to put the brakes on.

6. If the drive wheels start to skid:

push in the clutch to let them turn freely.
accelerate slightly to regain control.
use the brakes to slow down.

7. If your trailer starts to skid, you should:

release the brakes.
steer in the opposite direction.
pump the brakes.

8. When checking your tires during a pre-trip inspection, which of the following is acceptable?

Dual tires that come in contact with parts of the vehicle
Tires made by different manufacturers
Cracks in the tires

9. If you try to couple when the trailer is too low:

the tractor may strike and damage the trailer nose.
the tractor could roll away.
it might not couple correctly.

10. Headache racks:

protect you from being hit by your cargo.
can blind other drivers.
help you keep weights within legal limits.

ALASKA CDL COMBINATION PRACTICE TEST