Air Brakes #1
Air Brakes Endorsement Test | Nevada 2026 #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 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.
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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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2026 Nevada | Frequently Asked Questions
To secure a CDL Doubles/Triples endorsement in Nevada, you first need to have a valid Nevada CDL. Then, you must pass the Doubles/Triples Knowledge test. Studying the Nevada Commercial Driver License Manual can help prepare for this test. After passing, you can add the endorsement to your CDL at any DMV Full Service Office.
To obtain a CDL Doubles/Triples license, you need to have a valid Commercial Driver's License (CDL). You must then pass the Doubles/Triples Knowledge Test. Preparation for this test can be done using the CDL manual. Once you pass, the endorsement can be added to your license at your local DMV office.
Specialized experience or training is not a requirement for a CDL Doubles/Triples endorsement. However, you need to pass the Doubles/Triples Knowledge Test. Studying the CDL manual can help you prepare for this test. Once passed, the endorsement can be added to your existing CDL at your local DMV office.
Yes, to obtain a CDL Doubles/Triples endorsement in Nevada, you must pass the Doubles/Triples Knowledge Test. This test covers the specific safety rules and operational practices related to driving double and triple trailer trucks. You can prepare for this test using the CDL manual available from your local DMV office.
The CDL Doubles/Triples endorsement test primarily focuses on knowledge rather than specific skills or maneuvers. The test includes topics like coupling and uncoupling, inspecting doubles and triples, and managing cargo. However, there's no specific driving skills test for this endorsement. It's crucial to understand the handling characteristics of double/triple trailers for safe operation.
No, it is not permissible to operate double or triple trailers without a valid CDL Doubles/Triples endorsement in Nevada. Operating such vehicles without the proper endorsement could result in serious penalties, including fines and potential disqualification of your commercial driving privileges. Always ensure you have the correct endorsements for the vehicle you're operating.
You can add the CDL Doubles/Triples endorsement to your existing Commercial Driver's License. You don't need to initiate a new CDL application. However, you will have to pass the written knowledge test specific to driving double and triple trailers before the endorsement can be added to your license.
Yes, there are certain limitations for drivers with a CDL Doubles/Triples endorsement. Drivers must not exceed the maximum weight limit for the trailers, which is 80,000 pounds in Nevada. Plus, they must ensure safe loading and unloading of cargo. Also, they are subject to stricter driving hours regulations and more frequent inspections due to the potential safety risks associated with these larger vehicles.
In Nevada, the maximum weight limit for double/triple trailers, with a CDL Doubles/Triples endorsement, is 80,000 pounds. The total length of a double trailer cannot exceed 81.5 feet. Remember that these limits include the length and weight of the tractor unit as well. Always ensure you comply with these restrictions to avoid penalties.
Yes, safety is paramount when driving double/triple trailers. Drivers must observe all general commercial driving rules, plus specific ones for multiple trailers. These include maintaining a safe following distance, checking that connections are secure, and taking wide turns to avoid "off-tracking." Also, drivers should be trained in coupling/uncoupling procedures and understand the high rollover risk associated with these vehicles.
