Air Brakes #2
Air Brakes Endorsement Test | Ohio 2025 #2 Page 2 of 4
Train for FREE online with our Ohio 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 OH 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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7 . You should test the low pressure warning signal by:
It is essential that your low pressure warning light functions properly. After allowing the system to charge, you can test the warning signal by rapidly applying and releasing the brake pedal. This will release air from the braking system and the warning signal should come on when pressure drops to a dangerous level.
8 . While driving, ____ generally holds spring brakes in place.
While driving, spring brakes are generally held in place by air pressure. If the air pressure gets low enough, the springs will activate the brakes.
9 . What is removed when an air tank is drained?
In an air brake system, air tanks have drains to remove accumulations of water and compressor oil. Allowing water and oil to accumulate in the system could cause damage to the brakes.
10 . A slack adjuster should move no more than ____ from where it is attached to the push rod.
Before a trip, you should check each slack adjuster after parking, setting wheel chocks, and disengaging the parking brake. Pull the slack adjusters to make sure that they do not move more than about one inch from where the push rod is attached. If they move more than one inch, they may be out of adjustment and will need to be fixed.
11 . You should ____ if the low pressure warning signal activates while you are driving.
If the low pressure warning signal activates while you are driving, it is important that you safely exit the roadway as soon as possible and park your vehicle. If the air pressure gets too low, the brakes will no longer work well enough for you to stop safely.
12 . An application pressure gauge shows:
If a vehicle is equipped, an application pressure gauge shows how much air pressure is being applied to the brakes. This gauge can help a driver identify if their brakes are beginning to fade.
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2025 Ohio | Frequently Asked Questions
To secure a CDL Doubles/Triples endorsement in Ohio, you must first have a Commercial Driver's License (CDL). You then need to pass the Doubles/Triples Knowledge test. After passing the test, you can apply for the endorsement at your local Bureau of Motor Vehicles (BMV). Remember, driving experience with large trucks is highly recommended before applying.
To obtain a CDL Doubles/Triples license, you first need a valid Commercial Driver's License (CDL). Then, study the Doubles/Triples section of your state's CDL manual. After studying, you'll need to pass a written knowledge test at a local Bureau of Motor Vehicles (BMV). The test covers topics like coupling and uncoupling, inspecting doubles and triples, and handling.
While Ohio doesn't explicitly require specialized training for a CDL Doubles/Triples endorsement, it's highly recommended. Experience with large trucks is beneficial as handling double/triple trailers is complex. Preparing for the Doubles/Triples Knowledge test, which includes questions on coupling and uncoupling, inspecting doubles and triples, and checking air brakes, will also require some form of study or training.
Yes, to obtain a CDL Doubles/Triples endorsement in Ohio, you are required to pass the Doubles/Triples Knowledge test. This test focuses on specific areas like coupling and uncoupling, inspecting doubles and triples, and checking air brakes. It's crucial to study these areas thoroughly to successfully pass the exam.
The CDL Doubles/Triples endorsement test in Ohio is a written knowledge test, not a skills test. Therefore, you won't need to showcase any physical maneuvers. However, you'll need to demonstrate understanding of topics like coupling and uncoupling, inspecting doubles and triples, checking air brakes, and driving safely with more than one trailer.
No, it is not permissible to operate double/triple trailers without a valid CDL Doubles/Triples endorsement in Ohio. Operating such vehicles without the correct endorsement could result in fines, penalties, and potentially the suspension of your CDL. It's important to obtain the correct endorsements for the type of vehicle you're operating.
You can add the CDL Doubles/Triples endorsement to your existing commercial driver's license. You don't need to start a new application for a separate license. However, you will need to pass the Doubles/Triples Knowledge test and pay any associated fees to have this endorsement added to your current CDL.
Yes, there are limitations for drivers with a CDL Doubles/Triples endorsement. Drivers must strictly adhere to weight limits for double/triple trailers. They must also ensure proper coupling and uncoupling procedures, inspect trailers, and manage safe driving conditions. Additionally, certain highways or roads may prohibit the use of double/triple trailers due to their size.
In Ohio, the maximum weight for a vehicle with a double trailer is 80,000 pounds and the maximum length is 75 feet. For triple trailers, the maximum weight is also 80,000 pounds, but the length can vary. However, triples are rarely used due to their size and are restricted on many highways. Always check with local regulations for specific restrictions.
Yes, Ohio has specific safety guidelines for driving double/triple trailers. Drivers must understand how to couple and uncouple correctly, and how to inspect their vehicles. They must also know how to manage the space around their vehicle, control speed, and maneuver in different situations. Following these guidelines helps ensure the safety of everyone on the road.
