Air Brakes #2
Air Brakes Endorsement Test | Indiana 2026 #2 Page 2 of 4
Train for FREE online with our Indiana 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 IN 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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7 . Which type of brakes do most heavy-duty vehicles have?
Gravity brakes
For safety, most heavy-duty vehicles are equipped with dual air brake systems.
8 . During an applied leakage test, the maximum leakage rate for a single vehicle with air brakes is:
4 psi in one minute.
It is important to know the maximum air loss rate that is safe for your specific vehicle. A single vehicle with air brakes should have a leakage rate no higher than 3 psi in a minute during an applied leakage test.
9 . A low air pressure warning signal should activate:
When tank pressure falls below 5 psi.
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.
10 . If a vehicle has air brakes, the air compressor drive belt should be checked before each drive. In what condition should the belt be?
Bumpy
When inspecting a vehicle with air brakes that has a belt-driven air compressor, you should check the condition and tightness of the belt. It should be in good condition.
11 . When a brake pedal is pressed and the S-cam is turned, the S-cam:
Releases air from the air tanks.
When a brake pedal is pressed and the S-cam is turned, the S-cam presses the brake shoes against the inside of the brake drum. This causes friction and will cause the vehicle to slow.
12 . What happens if brakes become too hot?
The air compressor will kick in to cool the brakes
If brakes are overused, they may overheat and stop working. This is referred to as brake fade.
2026 Indiana | Frequently Asked Questions
In Indiana, a Commercial Driver's License (CDL) Class B allows you to operate single vehicles with a gross vehicle weight rating (GVWR) of 26,001 pounds or more or any such vehicle towing another not exceeding 10,000 pounds. It includes buses, farm labor vehicles, and any combination of vehicles that are not Class A vehicles.
A Class B Commercial Driver's License (CDL) in Indiana allows you to operate single vehicles with a Gross Vehicle Weight Rating (GVWR) of 26,001 pounds or more, or any such vehicle towing another not in excess of 10,000 pounds. This typically includes straight trucks, large buses, segmented buses, and dump trucks with small trailers.
To acquire a Class B CDL license in Indiana, you must be at least 18 years old (21 for interstate driving), possess a valid Indiana driver's license, pass a vision test, and obtain a medical clearance. You'll also need to pass written knowledge tests and a skills test, which includes a pre-trip vehicle inspection, a basic controls test, and an on-road driving exam.
In Indiana, you must be at least 18 years old to qualify for a Class B Commercial Driver's License (CDL) for intrastate driving (within Indiana only). However, you must be at least 21 years old to drive a commercial vehicle across state lines, carry hazardous materials, or transport passengers.
While not always necessary, specific endorsements may be required for certain jobs with a Class B CDL license in Indiana. These could include passenger, school bus, tanker, or hazardous materials endorsements. Each endorsement requires additional knowledge tests, and in some cases, a skills test. It's best to determine your job requirements before applying for endorsements.
The Class B CDL skills assessment in Indiana includes three parts: a pre-trip vehicle inspection to check if the driver can determine if the vehicle is safe to drive, a basic vehicle control test to assess the driver's ability to control the vehicle, and an on-road driving test to evaluate the driver's performance in real-world traffic situations.
Yes, there are some limitations for Class B CDL license holders. In Indiana, a Class B license allows you to operate single vehicles with a Gross Vehicle Weight Rating (GVWR) of 26,001 pounds or more, or a towed vehicle not exceeding 10,000 pounds GVWR. You can't operate vehicles that require a Class A license without the appropriate endorsements.
Yes, in Indiana, the written Class B CDL test is available in multiple languages. However, federal regulations require that all CDL holders must be able to read and speak English well enough 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 in Indiana due to disability. The Bureau of Motor Vehicles (BMV) is committed to ensuring that its services are accessible to all individuals. You should contact the BMV directly to discuss your specific needs and the types of accommodations available.
If you don't pass the Class B CDL written test in Indiana, you can retake it. However, you must wait until the next business day to do so. Keep in mind that there may be additional fees for each retake. It's also recommended to review your study materials thoroughly before attempting the test again.