Air Brakes #2
Air Brakes Endorsement Test | Maryland 2025 #2 Page 4 of 4
Train for FREE online with our Maryland 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 MD 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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19 . Front wheel braking works:
Under most conditions.
Front wheel braking is effective under all road conditions. It is unlikely that you will experience a front wheel skid, even on ice.
20 . What color are ABS malfunction lamps?
Blue
Vehicles with Anti-Lock Braking Systems (ABS) have yellow malfunction lamps.
21 . During a static leakage test, the maximum leakage rate for a double combination vehicle is:
4 psi in one minute.
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 air leaks from the air brake system at a quicker rate, the vehicle should not be driven because something likely needs to be repaired.
22 . The most common type of foundation brake used is the:
P-cam disc brake.
The most common type of foundation brake is an s-cam drum brake.
23 . Air tank drains:
Must remain open during driving.
Compressed air in an air brake system usually contains a certain amount of water and compressor oil. The water and oil can damage the brakes if left to accumulate in the system. Manually operated air tank drains must be opened daily to remove this build-up.
24 . What kind of force must emergency brakes use?
Electrical
Because air pressure can eventually leak away, the emergency brakes in an air brake system must be held on by mechanical force.
25 . Manual air tank drains should be:
Compressed air in an air brake system usually contains a certain amount of water and compressor oil. The water and oil can damage the brakes if left to accumulate in the system. Manually operated air tank drains must be opened daily to remove this build-up.
2025 Maryland | Frequently Asked Questions
A CDL Class A license in Maryland allows holders to operate any combination of vehicles with a Gross Combination Weight Rating (GCWR) of 26,001 or more pounds, provided the Gross Vehicle Weight Rating (GVWR) of the vehicle(s) being towed is in excess of 10,000 pounds. It typically covers tractor-trailers, truck and trailer combinations, and flatbeds.
A Class A CDL license allows you to operate vehicles such as tractor-trailers, truck and trailer combinations, tank vehicles, livestock carriers, and flatbeds. These vehicles typically have a Gross Combination Weight Rating (GCWR) of 26,001 or more pounds, with the vehicle(s) being towed exceeding 10,000 pounds GVWR.
To obtain a Class A CDL license in Maryland, you must be at least 18 years old (21 for interstate driving), possess a valid non-commercial driving license, and pass a medical examination. 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 examination.
In Maryland, you must be at least 18 years old to qualify for a Class A CDL license. However, please note that if you're under 21, you're only permitted to drive within the state (intrastate). To drive across state lines (interstate) or to carry hazardous materials, you must be at least 21 years old.
Endorsements are not required for a Class A CDL license, but they can expand your driving capabilities. For instance, H endorsement allows you to haul hazardous materials, N endorsement permits you to operate tank vehicles, and T endorsement enables you to tow double or triple trailers. Each endorsement requires passing a specific knowledge test.
The Class A CDL skills test in Maryland encompasses three areas. First, there's a pre-trip vehicle inspection to ensure the vehicle is safe to drive. Next is the basic controls test to assess your ability to control the vehicle. Finally, there's an on-road driving examination where you'll demonstrate your ability to drive safely in various road and traffic conditions.
Yes, there are limitations. Class A CDL license holders in Maryland are subject to federal regulations and state laws. They must not exceed the maximum allowed driving hours, must maintain a logbook, and undergo regular drug and alcohol testing. Restrictions may also be placed on the license due to the driver's medical conditions or lack of certain endorsements.
Yes, in Maryland, the written Class A CDL test can be taken in several languages other than English. These include Spanish and French, among others. However, the Federal Motor Carrier Safety Administration requires all commercial drivers to read and speak English sufficiently to converse with the general public, understand traffic signs and signals, respond to official inquiries, and make entries on reports and records.
Yes, you can request accommodations for the Class A CDL written test due to disability in Maryland. The Motor Vehicle Administration (MVA) provides reasonable accommodations for individuals with disabilities according to the Americans with Disabilities Act (ADA). You should contact your local MVA office in advance to discuss your specific needs and arrange suitable accommodations.
Yes, you can retake the Class A CDL written test in Maryland if you fail on your first attempt. You will need to wait at least 3 days before retaking the test. There may be additional fees for each retest. It's recommended to study thoroughly before reattempting to increase your chances of passing.