FREE Air Brakes Endorsement Test Online | District Of Columbia 2024 Page 3 of 4
Train for FREE online with our District Of Columbia 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 DC Class A/Class B driver license in 2021, 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.
25
20
20
13 . 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.
14 . When inspecting your brakes, a slack adjuster should move ____ from where it is attached to the push rod.
No more than one inch
Check each slack adjuster after 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.
15 . 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.
16 . When traveling down a steep downgrade, the best way to use your brakes is to:
Apply consistent pressure to the brake pedal all the way down the hill.
On a long or steep downgrade, brakes should only be used to supplement the braking effect of the engine. Apply the brakes just enough to feel a definite slowing down, then release them once you are about 5 mph below your target "safe" speed. Once your vehicle reaches its safe speed again, repeat this process.
17 . What can happen if parking brakes are used in very wet weather with temperatures below freezing?
The brakes may become too smooth to be used.
Parking brakes should not be used in very wet weather when temperatures are below freezing. The brakes could become frozen in place, making it impossible to move the vehicle.
18 . Most heavy-duty vehicles use:
Quadruple air brake systems.
Most heavy-duty vehicles use dual air brake systems, in which there are two separate braking systems operated by a single set of controls. Each system operates the brakes on different axles.
Search the best driving school in your neighbourhood
2024 District Of Columbia | Frequently Asked Questions
To secure a CDL Bus endorsement in the District of Columbia, you must first have a valid Commercial Driver's License (CDL). Then, you'll need to pass the Passenger Vehicles endorsement test. This includes a written knowledge test and a skills test in a vehicle similar to the one you'll be driving. You may also need to complete additional training.
To obtain a CDL Bus license in the District of Columbia, you must first have a valid driver's license. You'll then need to pass a general knowledge test, a passenger transport test, and a skills test which includes pre-trip vehicle inspection, basic vehicle control, and on-road driving. You must also provide medical certification and pass a background check.
Yes, specific training is necessary for a CDL Bus endorsement in the District of Columbia. This training typically covers topics like safe driving practices, emergency procedures, passenger management, and specific skills related to driving a bus. Additionally, you'll need to pass both a written test and a skills test demonstrating your knowledge and abilities.
CDL Bus licenses fall under Class A, B, or C depending on the vehicle's size and capacity. Class A is for combination vehicles over 26,001 pounds, Class B is for single vehicles over 26,001 pounds, and Class C is for vehicles designed to transport 16 or more passengers. Each class requires a different skills test.
No, you cannot use your personal vehicle for the CDL Bus driving test in the District of Columbia. The vehicle you use must match the class of CDL you are applying for. Therefore, you need to use a commercial bus for your test if you're seeking a bus endorsement. This ensures that you can handle the specific type of vehicle safely.
During the CDL Bus driving test in the District of Columbia, your ability to safely operate the vehicle is evaluated. This includes skills like pre-trip vehicle inspection, backing up, parallel parking, docking in an alley, making right and left turns, merging into traffic, maintaining appropriate speeds, and following safety procedures for loading and unloading passengers.
Yes, additional medical prerequisites are essential for a CDL Bus endorsement in the District of Columbia. Applicants must pass a Department of Transportation (DOT) physical examination by a certified medical examiner. This exam ensures you're physically capable of operating a commercial vehicle safely, checking aspects like vision, hearing, and overall physical health.
No, it's not permissible to transport passengers without a valid CDL Bus endorsement in the District of Columbia. The law requires anyone driving a commercial vehicle designed to carry 16 or more passengers, including the driver, to have a commercial driver's license with a passenger (P) endorsement. Driving without the correct endorsement could result in fines and penalties.
Yes, a CDL Bus endorsement can be added to your existing CDL in the District of Columbia. This requires passing a knowledge test and a skills test in a vehicle representative of the class of bus you wish to drive. Once you pass these tests, the endorsement can be added to your current license without needing a new one.
Yes, there are restrictions for drivers with a CDL Bus endorsement in the District of Columbia. These may include limitations related to the number of passengers, vehicle size, and cargo type. Additionally, bus drivers must comply with hours-of-service regulations, maintain a clean driving record, and pass regular drug and alcohol screenings. Violations can lead to endorsement suspension or revocation.
