Air Brakes Endorsement Test | Nevada 2026 #2

Train for FREE online with our Nevada CDL air brake 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 NV Class A/Class B driver license in 2026, 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 the requirements for CDL may vary from state to state.

Number of Question 25

Passing Score 20

Number of Tests 20

1 . Foundation brakes are used:

Only on the front wheels of a vehicle.

Only on the rear wheels of a vehicle.

On each wheel of a vehicle.

Foundation brakes are used on each wheel of a CMV. The most common type of foundation brake is the s-cam drum brake.

2 . What tells you how much pressure is in your vehicle's air tanks?

The supply pressure gauge

The ABS malfunction lamp

The tractor protection valve

A vehicle that is equipped with air brakes must also be equipped with a supply pressure gauge. This gauge tells the driver how much air pressure is in each of the vehicle's air tanks.

3 . When traveling down a steep downgrade:

The air brakes should be used.

Shift into a lower gear, then use brakes to supplement the braking effect of the engine.

The vehicle should be continually downshifted in the place of using the brakes.

The vehicle should be driven on the shoulder.

On a downgrade, the braking effect of the engine should be your primary method of controlling speed. Shift down to a lower gear before starting down the hill and save the brakes for additional slowing or stopping that may be required by road or traffic conditions.

4 . The air storage tanks:

Hold only enough air for one braking cycle.

Hold enough air for brakes to be used several times if the compressor stops working.

Do not hold air unless there is an emergency.

Hold enough air for more than 1,000 braking cycles.

In an air brake system, the air storage tanks hold enough air for brakes to be used several times if the compressor stops working.

5 . If the safety relief valve in an air brake system is releasing air:

You should not be concerned as this is a normal process.

There is something wrong with the brakes.

The valve is operational.

The safety relief valve in an air brake system releases air if necessary to prevent pressure in the system from becoming too high. If the valve starts releasing air, there is something wrong. Have a mechanic fix the problem.

6 . A wig wag is:

A low pressure warning device.

A tube that carries air to the brakes.

A type of air brake system.

Vehicles with air brakes are required to be equipped with a low pressure warning device. A wig wag is a type of low air pressure warning device. This device drops a mechanical arm into the driver's view if the pressure in the tanks drops to a level between 55 and 75 psi.

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2026 Nevada | Frequently Asked Questions

To acquire a CDL Tank endorsement in Nevada, first, you must have a valid Commercial Driver's License (CDL). Then, you need to pass the Tank Vehicle written test at your local DMV. This test covers the special driving rules and techniques for tank vehicles. Once you pass the test, the Tank endorsement will be added to your CDL.

To obtain a CDL Tank license, you must first hold a valid Commercial Driver's License (CDL). You should then study the Tank Vehicles section of your state's CDL handbook thoroughly. Once prepared, you'll need to pass a written tank vehicle endorsement test at your local DMV. This endorsement is required for driving vehicles transporting liquid or liquefied gas cargo.

Specific training or experience is not mandatory to obtain a CDL Tank endorsement in Nevada. However, it's crucial to know the unique handling characteristics of tank vehicles. Studying the CDL manual, particularly the section about tank vehicles, will help you pass the written test at the DMV and safely operate such vehicles.

Yes, to obtain a CDL Tank endorsement in Nevada, you must pass an additional written test specific to tank vehicles. This test covers unique rules and driving techniques for tank vehicles. It is taken at your local DMV and is in addition to the general CDL written test. You do not need to take an additional skills test.

The written test for the CDL Tank endorsement in Nevada covers topics specific to tank vehicles. These include understanding the high center of gravity, how liquid surge affects control, inspecting tank vehicles, and the rules for safe driving. It also includes handling bulkheads, baffled and unbaffled tanks, and emergencies specific to tank vehicles.

During the CDL Tank endorsement assessment in Nevada, the following skills and maneuvers are assessed: inspection of the vehicle, controlling the vehicle in various driving conditions, backing up and parking the vehicle, handling emergency situations, and demonstrating knowledge of tank vehicle safety regulations. It is important to study and practice these skills to successfully pass the assessment.

Yes, there are constraints for drivers with a CDL Tank endorsement in Nevada. For instance, they must comply with the Hazardous Materials Regulations (HMR) if they transport hazardous substances. Additionally, they must always maintain their CDL and endorsements, and adhere to all federal and state driving laws. Violations can result in temporary or permanent loss of their CDL privileges.

No, in Nevada, you cannot transport liquid or gas materials without a valid CDL Tank endorsement. This endorsement is required for operating a tank vehicle, which is defined as any commercial motor vehicle designed to transport any liquid or gaseous materials within a tank. Violating this can result in fines and loss of driving privileges.

The CDL Tank endorsement can be added to your existing Commercial Driver's License (CDL) in Nevada. You don't need a fresh application. However, you must pass a knowledge test specific to tank vehicle operation and pay the required fees. Once you pass the test, the Tank endorsement will be added to your CDL.

Yes, to handle hazardous materials with a CDL Tank endorsement in Nevada, you must also have a Hazardous Materials (HazMat) endorsement. This requires passing an additional knowledge test, a TSA background check, and fingerprinting. Without the HazMat endorsement, you may transport non-hazardous materials in a tank vehicle.