CDL Combination Test (2024) - FREE Alaska Practice Test

1. If driving a heavy vehicle, you should:

stay in the left lane.
stay in the right lane.
try to pass other vehicles going uphill.

2. What is the proper following distance for a 50 foot truck traveling at 50 mph?

3. Radial and bias-ply tires:

should be used together only when driving in packed snow.
should be used together.
should not be used together.

4. You are checking the tractor-trailer connection to make sure it is safe and secure. The landing gear should be:

fully lowered.
fully raised.
raised slightly off the ground.

5. If your vehicle is equipped with air brakes, loss of air pressure in the emergency line will cause:

the vehicle to slide back and forth.
the springs to put on the brakes.
the trailer emergency brakes to come on.

6. Most heavy-duty vehicles use:

7. When backing a tractor under a trailer, you should:

always use the lowest reverse gear.
back at an angle.
stop before when the kingpin is locked into the fifth wheel.

8. When driving a 50 foot combination vehicle at 50 mph in ideal conditions, you should keep at least ____ seconds of space in front of you.

9. For a cargo fire in a box trailer, you should:

wait 10 minutes before opening the doors.
open the doors immediately and use the fire extinguisher.
keep the doors shut.

10. Before entering a curve, you should:

COMBINATION PRACTICE TEST - AK CDL