Knowledge Test Class B #1
Class B Driving Test | District Of Columbia 2025 #1 Page 5 of 7
Train for FREE online with our District Of Columbia class B license 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 CDL class B permit 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 CDL class B requirements may vary from state to state.
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29 . Hydroplaning occurs when:
Front tires have less traction than rear tires.
Hydroplaning is an effect that occurs on wet roads when tires lose traction with the road surface and begin gliding along on a layer of water.
30 . If asked to sight-side back your vehicle into an alley, you should first:
Pull past the alley and stop parallel to the outer boundary.
If you are asked to alley dock, you should first pull past the alley and stop your vehicle in a position that is parallel to the outer boundary. From there, you should back your vehicle entirely into the alley parking area. Your vehicle should be parked in a straight position within the boundaries of the parking space.
31 . When approaching a curve during the on-road driving test, you must do all of the following, except:
Steadily use the brakes throughout the curve.
When approaching a curve during the on-road driving test, you should thoroughly check traffic in all directions. Before entering the curve, reduce your speed sufficiently so that further braking or shifting is not required. Keep your vehicle in its lane and continue checking traffic in all directions.
32 . 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.
33 . Trailers should:
Be loaded with all the weight directly behind the cab.
Overloading a vehicle is dangerous. It can damage the vehicle and interfere with the driver's ability to control it.
34 . Most drivers are the least alert:
After work.
Fatigue and lack of alertness are major hazards when driving at night. Most people are the least alert at night, especially after midnight.
35 . When checking the exhaust system, it should be:
Cracked.
When checking the exhaust system, you should verify that no parts of the system are loose, broken, or missing.
See the exact questions that will be on the 2025 District Of Columbia DMV exam.
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2025 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.
