Air Brakes #2
Air Brakes Endorsement Test | Montana 2025 #2
Train for FREE online with our Montana 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 MT 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 . What should happen before the air pressure in an air brake system tank falls below 55 psi?
The low air pressure warning signal must activate before the air supply pressure drops below 55 psi in the air tank. If the warning signal does not turn on when being tested during an inspection, the vehicle is not safe to drive.
2 . What does an air compressor do in an air brake system?
In an air brake system, the air compressor pumps air into the air storage tanks. The air compressor is controlled by the air compressor governor.
3 . To stop in a vehicle that uses air brakes, the driver should:
Pull the brake pedal up.
To make a normal stop in a vehicle with air brakes, push the brake pedal down. The harder the pedal is pressed, the more air pressure is released.
4 . The ____ between an air compressor and reservoir tank prevents air from escaping if the air compressor has a leak.
A one-way check valve is required to be between an air compressor and the first main reservoir. This valve prevents air from escaping the system if the air compressor develops a leak.
5 . Braking mechanisms are located ____ a brake drum.
On top of
Drum brakes are attached to the wheels and located on the axles of a vehicle. The braking mechanisms that cause the vehicle to stop can be found inside of a drum brake.
6 . When you are about to start down a hill, you should switch into a ____ gear.
Before starting down a hill, be sure to switch into a low gear. Gravity will increase your vehicle's speed as you travel downhill.
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2025 Montana | Frequently Asked Questions
In Montana, to secure a CDL Doubles/Triples endorsement, you must first hold a valid Commercial Driver's License (CDL). Then, you need to pass the Doubles/Triples Knowledge written test. After passing the test, pay the necessary fees at your local Montana Motor Vehicle Division office to have the endorsement added to your CDL.
To obtain a CDL Doubles/Triples endorsement, you must hold a valid Commercial Driver's License (CDL). You will then need to pass the Doubles/Triples Knowledge written test. Some states may require additional training or experience. Check with your local Department of Motor Vehicles for specific requirements in your state.
While you must have a valid Commercial Driver's License (CDL) to get a Doubles/Triples endorsement, Montana doesn't explicitly require specialized training or experience. However, it's recommended to undergo training for safety and proficiency. Keep in mind, you must pass the Doubles/Triples Knowledge Test to get the endorsement.
Yes, in Montana, to obtain a CDL Doubles/Triples endorsement, you are required to pass a specialized knowledge test. This test is designed to assess your understanding of safety protocols, operational procedures, and regulations associated with driving double and triple trailers. It's separate from the general CDL written exam.
The CDL Doubles/Triples endorsement test in Montana is a written knowledge test, not a skills test. It focuses on specific rules and safety guidelines related to hauling double and triple trailers. Topics include coupling and uncoupling, inspecting doubles and triples, and handling these large vehicles on the road. Practical skills or maneuvers are not directly tested for this endorsement.
No, it is not permissible. In Montana, as in all U.S. states, you must have a valid CDL with a Doubles/Triples endorsement to legally operate double or triple trailers. Driving such vehicles without the appropriate license and endorsement can result in hefty fines, license suspension, and potential legal consequences.
Yes, you can add the Doubles/Triples endorsement to your current CDL. You don't need to initiate a new license application. However, you will need to pass the Doubles/Triples endorsement knowledge test, and pay an additional fee. Once you pass, the endorsement will be added to your existing CDL.
Yes, there are limitations. A CDL Doubles/Triples endorsement allows you to operate vehicles with more than one trailer, but it doesn't permit you to drive all types of commercial vehicles. For instance, you would need additional endorsements to drive a school bus or a vehicle carrying hazardous materials. Furthermore, all CDL rules regarding medical fitness, hours of service, etc., still apply.
In Montana, the maximum weight for a vehicle (or combination) with a load is 131,060 pounds. The maximum length for a single trailer is 53 feet, and for double/triple trailers, the combined length should not exceed 75 feet. However, these limits can be subject to exceptions based on specific routes or permit conditions. Always check local regulations.
Yes, there are specific safety guidelines. Drivers must ensure the coupling devices are secure, maintain a safe following distance, and avoid sudden lane changes or hard braking. Also, they must be aware of the "crack-the-whip" effect, which can cause the last trailer to overturn at high speeds or sharp turns. Regular vehicle inspections and adhering to federal and state regulations are also required.
