When any vehicle goes around a corner, the rear wheels follow a different path than the front wheels. This is called off-tracking. The degree of off-tracking will be greater on long vehicles than on short vehicles.

Follow a different path than the front wheels.

Follow the same path as the front wheels.

Follow a different path than the front wheels.

Should not be a concern to the driver.

If your vehicle gets stuck on railroad tracks for any reason, you should immediately exit the vehicle and walk away from the tracks. Contact the proper emergency authorities.

Exit the cab and walk away from the tracks.

Sit in the cab and call for help.

Exit the cab and walk away from the tracks.

Motion for another driver to push your vehicle.

Older trailers do not have spring brakes. This means that if the air supply in an older trailer's air tank has leaked away, there will be no working brakes connected to the trailer and its wheels will turn freely.

The trailer will not have brakes.

The trailer will stop normally.

The trailer will not have brakes.

Tractor protection controls in older vehicles may be operated by levers instead of knobs. If an air supply control is set in its "emergency" position, the air supply will be stopped and the trailer emergency brakes will be applied.

The trailer emergency brakes will be applied.

The vehicle will increase speed.

The trailer emergency brakes will be applied.

The air supply to the trailer will increase.

Before a trip, you should ensure that air reaches all air brakes on all trailers by opening up the rear emergency line and service line shut-off valves and listening for escaping air. Close both shut-off valves before beginning to drive.

Close the emergency line valve.

Leave the service line valve open.

Close the emergency line valve.

A tractor protection valve keeps air in a tractor or truck air brake system should the trailer break away or develop a bad leak. The valve will close automatically if the pressure drops to an unsafe level.

A valve to keep air in the brake system should there be a bad leak

A valve that prevents a truck from being stolen

A valve that prevents the driver from driving too fast

Combination Vehicles Practice Test | Alaska 2024 #1

Train for FREE online with our Alaska CDL combination vehicle test. The official exam test consists of several obligatory parts, with all of them checking your knowledge of different blocks of road rules. If you need to obtain a AK combination license in 2024, practice as much as possible. Free sample tests published on our website will help you check and improve your knowledge and boost your grades. Please bear in mind that DMV requirements for issuing a combination license may vary from state to state.

Number of Question 20

Passing Score 16

Number of Tests 20

Combination Vehicles Practice Test | Alaska 2024 #1

1 . When a vehicle goes around a corner, the rear wheels:

2 . If your vehicle gets stuck on railroad tracks, you should:

3 . Older trailers are not equipped with spring brakes. This means that if the air supply for a vehicle's air braking system leaks away:

4 . If an air supply control is in its "emergency" position:

5 . Before beginning a trip, you should:

6 . What is a tractor protection valve?

7 . When backing up your tractor while coupling it to a trailer, the trailer brakes should be:

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