Air Brakes #2
Air Brakes Endorsement Test | California 2025 #2 Page 3 of 4
Train for FREE online with our California 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 CA 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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13 . ____ make up the emergency brake system.
In an air brake system, there are three different braking systems: a service brake system, a parking brake system, and an emergency brake system. The emergency brake system uses parts of both the parking and service brake systems.
14 . What can happen if the air pressure gets too low in an air brake system?
Pressing and releasing the brake pedal unnecessarily can let air out of the braking system faster than the compressor can replace it. Air brakes may cease to work effectively if the pressure becomes too low.
15 . What must be on all air tanks with air-braked vehicles?
All air tanks on air-braked vehicles must have a check valve located between the air compressor and the first reservoir. The valve allows air to flow in only one direction and helps keep air from leaving the air compressor if the compressor develops a leak.
16 . During an inspection, slack adjusters on S-cam brakes should not move more than:
Check each slack adjuster after parking on level ground, setting wheel chocks, and disengaging the parking brake. Pull the slack adjusters to make sure 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.
17 . 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.
18 . Why should you regularly drain the air tanks?
Compressed air usually contains a certain amount of moisture and compressor oil, which can build up in the air storage tanks and damage the brake system. The tanks should be drained to clean out these accumulations. On a tank with a manual drain valve, draining should be performed at the end of each day of driving.
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2025 California | Frequently Asked Questions
To obtain a CDL Tank endorsement in California, you must first have a Commercial Driver's License (CDL). Then, study the California CDL handbook's section on Tank Vehicles to prepare for the written test. Schedule and pass the written test at your local DMV. Once passed, you'll receive your Tank endorsement, allowing you to drive commercial tank vehicles.
To obtain a CDL Tank license, it's essential to first have a Commercial Driver's License (CDL). You must also study the tank vehicle section of the CDL handbook, pass a written test specific to tank vehicles, and pay the required fees. Knowledge of inspection procedures, driving techniques, and handling emergencies is crucial.
While California doesn't specifically mandate training or experience for a CDL Tank endorsement, it's highly recommended. Understanding the operation of tank vehicles, safety procedures, and how to handle emergencies is crucial. Studying the tank vehicle section of the CDL handbook and gaining practical experience will greatly improve your chances of passing the endorsement test.
Yes, to obtain a CDL Tank endorsement in California, you must pass the Tank Vehicle endorsement test. This written exam covers topics such as the inspection of tank vehicles, driving tank vehicles, and safe driving rules. It's an additional test beyond the general CDL exam and is required for the endorsement.
The written test for a CDL Tank endorsement covers subjects such as inspecting tank vehicles, safe driving for tank vehicles, and handling emergencies. This includes understanding the high center of gravity in these vehicles, the impact of liquid surge on vehicle control, and procedures for loading and unloading. Knowledge of specialized laws relating to tank vehicles is also tested.
The CDL Tank endorsement assessment doesn't involve a specific skills test or maneuvers like the basic CDL exam. Instead, it focuses on a written test that assesses your understanding of tank vehicle operations. This includes knowledge of safe driving techniques, handling liquid surge, emergency procedures, and how to properly inspect and maintain tank vehicles.
Yes, drivers with a CDL Tank endorsement must follow specific rules. These include weight restrictions for the vehicle, following hours of service regulations, and restrictions on hazardous materials transport if the driver doesn't hold a Hazmat endorsement. Violations can lead to CDL disqualification. It's crucial to understand and follow these regulations to maintain the endorsement.
No, drivers cannot transport liquid or gas materials without a valid CDL Tank endorsement. This endorsement is required for operating a commercial vehicle that is designed to transport any liquid or gaseous materials within a tank or tanks having an individual rated capacity of more than 119 gallons and an aggregate rated capacity of 1,000 gallons or more.
The CDL Tank endorsement can be added to your existing CDL. You don't need to apply for a new license. However, you will need to pass the Tank Vehicle written knowledge test. Once you pass, the Tank endorsement will be added to your current CDL, expanding the types of vehicles you're authorized to drive.
Yes, to handle hazardous materials with a CDL Tank endorsement, you must also have a Hazardous Materials (Hazmat) endorsement. This requires passing an additional written test and a Transportation Security Administration background check. It ensures drivers understand safety protocols for handling hazardous materials, reducing the risk of incidents.
