Air Brakes #1
Air Brakes Endorsement Test | Nevada 2025 #1 Page 4 of 4
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 2025, 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.
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19 . A low air pressure warning signal should activate:
In an air brake system, a low air pressure warning signal must come on if air pressure in the tanks falls below 55 psi. This warning signal may come in the form of a light, a buzzer, or a wig wag.
20 . To ensure normal stopping power, drivers of vehicles equipped with a front brake limiting valve should:
Some older vehicles have front brake limiting valves with "normal" and "slippery" settings. Setting a brake limiting valve to "slippery" reduces the vehicle's stopping power, so a driver should make sure the valve is in its "normal" position. Front wheel braking has proven to be effective in all driving conditions.
21 . When traveling down a steep downgrade:
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.
22 . To make a stop in a vehicle equipped with air brakes, the driver should:
To make a normal stop in a vehicle that is equipped with air brakes, you should simply press the brake pedal down.
23 . What should happen before the air pressure in an air brake system tank falls below 55 psi?
The low air pressure warning signal must activate before the air supply pressure drops below 55 psi in the air tank. If the warning signal does not turn on when being tested during an inspection, the vehicle is not safe to drive.
24 . Air pressure should build up in a single air system within:
One minute.
In a vehicle with a single air brake system, after the engine is at operating rpms, the pressure in the air system should generally build from 50 to 90 psi within three minutes.
25 . A wig wag is:
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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2025 Nevada | Frequently Asked Questions
A CDL Class B license in Nevada allows individuals to operate single vehicles with a GVWR of 26,001 or more pounds, or a vehicle towing another not exceeding 10,000 pounds. It includes buses, farm labor vehicles, and any vehicle designed to transport 24 passengers or more, including the driver. This classification doesn't include motorcycles or mopeds.
A Class B CDL license in Nevada allows the holder to operate single vehicles with a gross vehicle weight rating (GVWR) of 26,001 or more pounds, or tow a vehicle not heavier than 10,000 pounds. This includes large passenger buses, segmented buses, delivery trucks, dump trucks with small trailers, and straight trucks.
To acquire a Class B CDL license in Nevada, you must be at least 21 years old (18 for intrastate driving), possess a valid Nevada driver's license, and pass a medical examination. You also need to pass the General Knowledge test and any other knowledge tests for the specific vehicle type. Lastly, you must pass a driving skills test in a vehicle representative of the class of CDL you're applying for.
To qualify for a Class B CDL license in Nevada, you must be at least 18 years old for intrastate driving (within Nevada only). However, if you intend to drive interstate (across state lines) or haul hazardous materials, you must be at least 21 years old.
Specific endorsements aren't necessary for a Class B CDL license, but they can expand job opportunities. Endorsements certify additional skills such as driving passenger vehicles, tank vehicles, or vehicles carrying hazardous materials. To get an endorsement, you must pass additional knowledge and skills tests related to the specific type of vehicle.
The Class B CDL skills assessment in Nevada encompasses three parts: a pre-trip inspection, a basic vehicle control test, and an on-road driving test. The pre-trip inspection tests your ability to assess the vehicle's condition. The basic control test evaluates your ability to maneuver and control the vehicle, and the on-road test assesses your driving skills in traffic.
Class B CDL license holders are limited to operating vehicles with a GVWR of 26,001 pounds or more, or any such vehicle towing another not in excess of 10,000 pounds. They cannot drive a tractor-trailer combination or a truck with double/triple trailers. Also, without specific endorsements, they cannot transport passengers or hazardous materials.
Yes, it's possible to take the written Class B CDL test in languages other than English. The Nevada DMV offers the test in Spanish. However, federal regulations require that all CDL holders understand English well enough to read road signs, prepare reports, and communicate with the public and law enforcement.
Yes, you can request test accommodations for the Class B CDL written exam in Nevada if you have a disability. The Nevada Department of Motor Vehicles (DMV) complies with the Americans with Disabilities Act (ADA) and provides accommodations such as sign language interpreters, extended test time, and tests in alternative formats. You should contact your local DMV office to make these arrangements.
Yes, you can retake the Class B CDL written test if you don't pass on your first attempt. In Nevada, you must wait at least one day before retesting. However, keep in mind that each retest will require a new fee. It's advisable to study thoroughly to ensure success on subsequent attempts.
