Air Brakes #2
Air Brakes Endorsement Test | South Dakota 2025 #2 Page 3 of 4
Train for FREE online with our South Dakota 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 SD 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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13 . Alcohol evaporators are:
Some air brake systems include an alcohol evaporator. The evaporator introduces alcohol into the braking system to prevent the formation of ice, which can cause damage.
14 . The parking brake should be:
Removed.
The parking brake in a vehicle with air brakes should be used every time the vehicle is parked.
15 . Brakes out of adjustment will:
Brakes out of adjustment will fade before those that are properly adjusted. Brake adjustment must be checked frequently to help prevent brake issues.
16 . What does the air compressor governor do?
In an air brake system, the air compressor governor controls when the air compressor pumps air into the storage tanks. It stops pumping if the pressure in the tanks becomes too high, and begins pumping if the pressure becomes too low.
17 . Lights that indicate that anti-lock brakes are not working are:
Vehicles equipped with Anti-Lock Braking Systems (ABS) have yellow malfunction lights to indicate issues in the braking system.
18 . Air tank drains:
Compressed air in an air brake system usually has a certain amount of water and oil in it. This can harm the system if allowed to accumulate. Air tanks have drain valves to aid in removing water and oil from the compressed air.
2025 South Dakota | Frequently Asked Questions
To secure a CDL Doubles/Triples endorsement in South Dakota, you must already possess a Commercial Driver's License (CDL). Then, you need to pass the Doubles/Triples Endorsement knowledge test. Study the relevant sections in the South Dakota CDL Manual beforehand. After passing the test, you'll receive your endorsement. Remember, driving experience with these types of vehicles is recommended.
To obtain a CDL Doubles/Triples license, you must already have a Commercial Driver's License (CDL). Then, pass the Doubles/Triples endorsement knowledge test. This test covers information found in the South Dakota CDL manual. It is also beneficial to have practical experience driving these types of vehicles, although not required. After passing the test, you'll receive your endorsement.
While specialized experience or training isn't a legal requirement for a CDL Doubles/Triples endorsement in South Dakota, it's highly recommended. Knowledge of handling these vehicles can be beneficial for the endorsement knowledge test. Studying the South Dakota CDL Manual, particularly sections on Doubles/Triples, is essential. Practical experience can also increase your chances of passing the driving test.
Yes, to obtain a CDL Doubles/Triples endorsement in South Dakota, you must pass an additional knowledge test specifically for Doubles/Triples. This test covers topics like coupling and uncoupling, inspecting doubles and triples, and handling these types of vehicles. The information for this test is found in the South Dakota CDL Manual.
The CDL Doubles/Triples endorsement test in South Dakota is a knowledge test, not a skills test. Therefore, you won't need to showcase any specific maneuvers. However, the test will cover topics such as coupling and uncoupling, inspecting doubles and triples, and the procedures for handling these types of vehicles. It's essential to understand these aspects thoroughly.
No, it is not permissible. In South Dakota, you must have a valid Commercial Driver's License (CDL) with a Doubles/Triples endorsement to legally operate double or triple trailers. Operating these vehicles without the proper endorsement can result in serious penalties, including fines and potential suspension of your CDL.
To add the CDL Doubles/Triples endorsement to your current license in South Dakota, you will need to initiate a new application. You cannot simply append the endorsement to your existing license. You will have to meet the requirements, including passing the knowledge test and paying the necessary fees, to obtain the endorsement.
Yes, there are some limitations for drivers holding a CDL Doubles/Triples endorsement. These drivers are only allowed to operate double and triple trailers. They cannot operate other types of commercial vehicles unless they have the appropriate endorsements. Also, they must follow all federal and state regulations regarding maximum weight, length, and safety requirements for double/triple trailers.
In South Dakota, the maximum legal weight for a vehicle (including double/triple trailers) is 80,000 pounds. The maximum length for a double trailer is 81.5 feet and for triple trailers, it's 103 feet. However, these limits can be exceeded with special permits, which are issued based on factors like route capacity and vehicle configuration.
Yes, there are specific safety guidelines. Drivers with a CDL Doubles/Triples endorsement must perform regular inspections to check brakes, tires, lights, and other safety equipment. They must also follow special procedures for coupling and uncoupling trailers, and they must maintain safe following distances to allow for the increased stopping time needed for these larger vehicles.