Air Brakes #1
Air Brakes Endorsement Test | Delaware 2025 #1
Train for FREE online with our Delaware 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 DE 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 . During a static leakage test, what is the maximum leakage rate that is safe for a double combination vehicle?
When performing a static leakage test on a double combination vehicle with air brakes, the leakage rate should be no more than 3 psi in one minute. If the air leaks from the air brake system at a quicker rate, the vehicle should not be driven because something likely needs to be repaired.
2 . How many air storage tanks are used in an air brake system?
The number varies.
Air storage tanks are used to hold compressed air. The number and size of air tanks in an air brake system varies among vehicles.
3 . A modulating control valve can control the:
Anti-lock braking system (ABS).
A modulating control valve allows a driver to gradually apply spring brakes. In equipped vehicles, the valve is controlled by a lever located on the dashboard.
4 . Air tank drains:
Must remain open while driving.
In an air brake system, the air storage tanks are equipped with drains to allow water and compressor oil to be removed. The water and oil can damage the brakes if left to accumulate in the system.
5 . What tells you how much pressure is in your vehicle's air tanks?
A vehicle that is equipped with air brakes must also be equipped with a supply pressure gauge. This gauge tells the driver how much air pressure is in each of the vehicle's air tanks.
6 . 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.
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2025 Delaware | Frequently Asked Questions
In Delaware, a Commercial Driver's License (CDL) Class B allows the holder to operate vehicles with a Gross Vehicle Weight Rating (GVWR) of more than 26,000 pounds, or towing vehicles not in excess of 10,000 pounds. This includes buses, dump trucks, tow trucks, delivery trucks and garbage trucks. Endorsements may be required for certain vehicles such as school buses.
A Class B Commercial Driver's License (CDL) in Delaware allows the holder to operate vehicles like buses, dump trucks, tow trucks, delivery trucks, and garbage trucks. These vehicles have a Gross Vehicle Weight Rating (GVWR) of over 26,000 pounds or are towing vehicles not exceeding 10,000 pounds. Certain vehicles may require additional endorsements.
To acquire a Class B CDL license in Delaware, the applicant must be at least 18 years old (21 for interstate driving), possess a valid Delaware driver's license, and pass a vision test. They must also pass written knowledge tests, a pre-trip vehicle inspection test, and a road skills test. A Department of Transportation (DOT) medical certification may also be required.
To qualify for a Class B Commercial Driver's License (CDL) in Delaware, you must be at least 18 years old. However, you must be 21 years or older if you plan to drive commercial vehicles across state lines (interstate driving) or transport hazardous materials.
While endorsements aren't necessary to obtain a Class B CDL license, they can expand your job opportunities. Endorsements certify you to drive certain types of vehicles or transport specific items. For example, a passenger endorsement allows you to drive a bus, and a hazardous materials endorsement permits you to transport hazardous goods. Endorsements require additional tests.
The Class B CDL skills test in Delaware includes a pre-trip vehicle inspection, a basic vehicle control test, and an on-road driving test. These assess your ability to inspect your vehicle before the trip, control the vehicle in various situations like turning and parking, and safely drive on public roads, adhering to traffic laws.
Class B CDL license holders in Delaware are restricted to driving single vehicles with a gross vehicle weight rating (GVWR) of 26,001 lbs. or more, or towing a vehicle not exceeding 10,000 lbs. GVWR. They cannot operate Class A combination vehicles. Additional endorsements may be required for certain vehicles like school buses or tank trucks.
In Delaware, the written Class B CDL test is primarily offered in English. However, some testing centers may provide the test in Spanish. It's recommended to contact your local DMV to confirm language availability. It's important to note that all drivers must be able to understand and read English to comply with federal regulations.
Yes, Delaware offers accommodations for the Class B CDL written exam due to disability. You can request for special arrangements by contacting the Delaware Division of Motor Vehicles (DMV). They will guide you through the process. The accommodation could include extra time, a quiet room, or a reader, depending on your specific needs.
If you fail the Class B CDL written test in Delaware, you can retake it. However, you must wait at least 2 business days before attempting the test again. If you fail three times, you will need to wait 30 days before your next attempt. Each test attempt requires a separate fee.
