Air Brakes #1
Air Brakes Endorsement Test | Ohio 2025 #1 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 . 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.
8 . The rods in S-cam brakes move the slack adjusters when air pressure is added to the brake chambers. This air pressure is added to the chambers when the driver:
When pressing the brake pedal in a vehicle with S-cam brakes, air will enter the brake chambers. The added air pressure will push out the rods and move slack adjusters, twisting the brake camshafts.
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 . What kind of brakes do most newer heavy-duty trucks use?
Most newer heavy-duty vehicles use dual air brake systems. A dual air brake system has two separate air brake systems which use a single set of brake controls.
11 . Vehicles equipped with Anti-Lock Braking Systems (ABS) have ____ malfunction lamps to indicate when the ABS is not working.
Vehicles with ABS have yellow malfunction lamps to alert drivers when the braking systems are not working. Be sure you know where the malfunction lamp on your vehicle is before beginning a trip.
12 . Why do large vehicles use air brakes?
If used and maintained properly, air brakes are a safe and effective way to stop large, heavy vehicles.
2025 Ohio | Frequently Asked Questions
In Ohio, a Commercial Driver's License (CDL) Class B allows you to operate a single vehicle with a gross vehicle weight rating (GVWR) of 26,001 lbs or more, or tow a vehicle not exceeding 10,000 lbs. It also permits driving buses, farm labor vehicles, and any vehicle not defined in Class A or Class C.
A Class B CDL license in Ohio allows operation of single vehicles with a gross vehicle weight rating of 26,001 lbs or more, or those towing vehicles not exceeding 10,000 lbs. This includes buses, dump trucks, tow trucks, delivery trucks, garbage trucks, and straight trucks. It does not include Class A or Class C vehicles.
To acquire a Class B CDL license in Ohio, you must be at least 18 years old (21 for interstate driving), possess a valid Ohio driver's license, pass a vision test, and complete a written knowledge exam. Additionally, you must pass a skills test which includes a pre-trip inspection, basic controls test, and on-road driving test. Medical examinations may also be required.
In Ohio, you must be at least 18 years old to qualify for a Class B Commercial Driver's License (CDL) for intrastate driving (within Ohio only). However, if you plan 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 in Ohio, but they can expand your driving capabilities. Endorsements are available for passenger transport (P), school buses (S), tank vehicles (N), and hazardous materials (H). Each endorsement requires passing additional knowledge and skills tests.
The Class B CDL skills assessment in Ohio includes three parts: a pre-trip vehicle inspection to test your ability to assess if the vehicle is safe to drive, a basic controls test to evaluate your ability to control the vehicle, and an on-road driving test to assess your skills in traffic situations, including left and right turns, intersections, railway crossings and more.
Yes, there are limitations for Class B CDL license holders in Ohio. They are allowed to operate single vehicles with a gross vehicle weight rating of 26,001 lbs or more, or any such vehicle towing another not exceeding 10,000 lbs. However, they cannot legally operate a Class A combination vehicle. For some vehicles like school buses or tank trucks, special endorsements are required.
In Ohio, the written Class B CDL test is primarily offered in English. However, some locations may offer the test in other languages. It's recommended to contact your local Ohio Bureau of Motor Vehicles (BMV) for specific information on language availability. Note that federal regulations require all CDL holders to read and speak English sufficiently to converse with the general public, understand highway traffic signs and signals, respond to official inquiries, and make entries on reports and records.
Yes, you can request accommodations for the Class B CDL written exam if you have a disability. The Ohio Bureau of Motor Vehicles (BMV) provides reasonable testing accommodations in compliance with the Americans with Disabilities Act (ADA). However, you need to make this request in advance and provide documentation of your disability. Contact your local BMV for specific procedures on requesting accommodations.
Yes, if you fail the Class B CDL written test in Ohio, you can retake it. However, you must wait at least 24 hours before retesting. There is no limit to the number of times you can retake the test, but a retesting fee applies each time. It's advisable to study thoroughly to increase your chances of passing on the next attempt.