Driving combination vehicles requires more skill than driving single commercial vehicles. Combinations are generally longer, generally heavier, and are more vulnerable to rollover.

Require more skill to drive than single commercial vehicles.

Often have taller trailers than single commercial vehicles.

Are usually lighter than single commercial vehicles.

Require more skill to drive than single commercial vehicles.

Driving combination vehicles requires more skill than driving single commercial vehicles. Combinations are generally longer, generally heavier, and are more vulnerable to rollover.

Usually require more skill to drive than single commercial vehicles.

Are usually shorter than single commercial vehicles.

Usually require less skill to drive than single commercial vehicles.

Usually require more skill to drive than single commercial vehicles.

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.

Before a trip, be sure to inspect all couplings. There should be no space between the upper and lower fifth wheel.

A maximum of two inches of space

To reduce the risk of tipping over when driving with a trailer, you should steer gently and smoothly. Avoid making sudden movements.

Accelerate by pushing the accelerator to the floor.

Combination Vehicles Practice Test | Idaho 2024 #2

Train for FREE online with our Idaho 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 ID 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 | Idaho 2024 #2

1 . Combination vehicles:

2 . Combination vehicles:

3 . In a vehicle equipped with an automatic tractor protection valve, the valve will pop out when air pressure drops to a level between:

4 . Before beginning a trip, you should:

5 . How much space should be between the upper and lower fifth wheel?

6 . When driving with trailers, you should:

7 . When connecting a converter dolly to a second trailer, the trailer height should be ____ the center of the fifth wheel.

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