Air Brakes #1
Air Brakes Endorsement Test | Indiana 2025 #1
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 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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1 . Before a vehicle with dual air brakes is driven, pressure of at least ____ should be built up in both braking systems.
100 psi
Before driving a vehicle with a dual air brake system, allow time for the air compressor to build up pressure of at least 100 psi in both the primary and secondary systems.
2 . 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.
3 . What does the air compressor governor do?
Controls the temperature of the air leaving the air storage tanks.
In an air brake system, the air compressor governor controls when the air compressor pumps air into the air storage tanks.
4 . Brakes can get out of adjustment:
If brakes on one side are used more often than brakes on the other side.
Brakes are particularly prone to getting out out adjustment if they are hot. Use proper braking techniques to avoid letting your brakes overheat.
5 . Service brakes should:
Before driving, you should always verify that your service brakes are in good working order. Testing the brakes before a trip allows you to locate any problems before you need to brake while on the road.
6 . 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.
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2025 Indiana | Frequently Asked Questions
To secure a CDL Doubles/Triples endorsement in Indiana, you must already have a valid CDL. Then, you'll need to pass the Doubles and Triples Endorsement Knowledge Test. This test covers topics like coupling and uncoupling, inspecting doubles and triples, and handling. After passing the test, you can add the endorsement to your CDL.
To obtain a CDL Doubles/Triples license, you must first have a Commercial Driver's License (CDL). You are then required to pass the Doubles/Triples Endorsement Knowledge Test. This test includes understanding of coupling and uncoupling, inspecting doubles and triples, and handling these vehicles. After successfully passing the test, you can add the endorsement to your CDL.
While Indiana does not specifically require specialized experience or training for a CDL Doubles/Triples endorsement, it's beneficial to have training in handling these types of vehicles. You must pass the Doubles/Triples Endorsement Knowledge Test, which covers topics like coupling and uncoupling, and inspecting doubles and triples. So, practical experience or training would help you pass the test.
Yes, to receive a CDL Doubles/Triples endorsement in Indiana, you must pass the Doubles/Triples Endorsement Knowledge Test. This written exam covers topics such as coupling and uncoupling, inspecting doubles and triples, and the proper procedures for driving these types of vehicles. After passing the test, you can add the endorsement to your CDL.
There's no specific skills test or maneuvers to showcase for the CDL Doubles/Triples endorsement. However, you need to pass the Doubles/Triples Endorsement Knowledge Test. This test evaluates your understanding of coupling and uncoupling, inspecting doubles and triples, and handling these vehicles. The CDL handbook provides all the necessary information for this test.
No, it's not permissible to operate double or triple trailers in Indiana without a valid CDL Doubles/Triples endorsement. Operating these types of vehicles requires specific skills and knowledge, which are tested during the endorsement process. Driving without the proper endorsements can result in significant fines and penalties, including the suspension of your CDL.
Yes, you can append the CDL Doubles/Triples endorsement to your current Commercial Driver's License (CDL). You don't need to initiate a new application for a CDL, but you will need to apply for the endorsement, pass the knowledge test, and pay any associated fees to receive the endorsement on your existing CDL.
Yes, there are limitations. Drivers with a CDL Doubles/Triples endorsement must adhere to specific rules, including maximum weight limits for trailers and load. They also need to follow rules related to coupling and uncoupling, and inspecting the doubles/triples. Additionally, they must not operate vehicles that exceed the endorsement's specifications. Violating these regulations can lead to penalties or loss of endorsement.
In Indiana, a semi-trailer's maximum length is 53 feet, and the combined length should not exceed 65 feet. For weight, a vehicle with a single or tandem axle can weigh up to 20,000 or 34,000 pounds respectively. The gross vehicle weight (including all trailers) should not exceed 80,000 pounds. These limits may vary depending on specific roads or bridges.
Yes, there are specific safety guidelines. Drivers must check that all couplings are secure, ensure the heaviest trailer is directly behind the truck, and maintain a safe following distance. Additionally, they must take extra care while turning due to off-tracking and avoid sudden lane changes or braking which could cause jackknifing. Regular vehicle inspections are also mandated.
