It is important that all of a vehicle's equipment is in proper working condition before beginning a trip. If a trailer's spring brakes do not release when you push in the tractor air supply control, you should make sure the air line connections are properly attached and sealed.

Inspect the air line connections.

Activate the Anti-Lock Braking System.

Turn the engine off and on again.

The trailer hand valve (also referred to as the "trolley valve" or "Johnson bar") works the trailer brakes and should be used only when testing them. Using the trailer hand valve while driving could result in a skid.

To check the connection between the trailer and tractor.

If your trailer begins to skid, you should release the brakes to regain traction. The trailer will begin to straighten out once the wheels begin to grip the road again.

Quickly turn the steering wheel in one direction, then in the other.

Making a sudden lane change can be dangerous while driving a combination vehicle. You can avoid the need to make a sudden lange change by looking down the road for upcoming obstacles that will require you to change lanes.

Can help you avoid the need for sudden lane changes.

Is more dangerous than only watching your mirrors.

Does not help you drive more safely.

Can help you avoid the need for sudden lane changes.

Combination vehicles require more space on the road than other vehicles. When entering or crossing traffic while driving a combination vehicle, it is especially important that there is a large enonugh gap in traffic to safely do so.

Wait for a gap large enough for your vehicle to safely cross.

Assume other drivers will make room for your vehicle.

Wait for a gap large enough for your vehicle to safely cross.

Combination Vehicles Practice Test | Hawaii 2024 #1

Train for FREE online with our Hawaii 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 HI 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 | Hawaii 2024 #1

1 . More than half of all accident-related truck driver deaths are caused by:

2 . If you press the tractor air supply control and your trailer's spring brakes do not release, you should:

3 . The trailer hand valve should be used:

4 . Place the trailer air supply control in its "emergency" position to test:

5 . If a trailer begins to skid, it is best for the driver to:

6 . Watching the road ahead:

7 . If you must cross traffic while driving a combination vehicle, you should:

See the exact questions that will be on the 2024 DMV exam.

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