District of columbia Driver's Examination

Knowledge Test Class A #1

FREE CDL Class A Driving Test Online | District Of Columbia 2024

Train for FREE online with our District Of Columbia class A 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 A permit 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 CDL class A requirements may vary from state to state.

Number of Question 50

Passing Score 40

Number of Tests 20

1 . To ensure you do not interfere with traffic while driving a heavy vehicle, you should:

Switch gears while driving uphill.

Try to pass other vehicles while driving uphill.

Stay in the right lane.

Ride the brakes while driving downhill.

If the weight of your vehicle prevents you from matching the speed of surrounding traffic, you should stay in the right lane, if possible.

2 . If something is found to be unsafe during a pre-trip inspection, you should:

Continue with the trip and make an appointment with a mechanic after the trip is completed.

Let a more experienced driver use the truck.

Get the issue fixed immediately.

Not use the items found to be unsafe, but may continue driving normally.

If a pre-trip inspection reveals anything unsafe about your vehicle, you must get it repaired. It is illegal to operate an unsafe vehicle.

3 . When driving through fog, a driver should:

Use high beam headlights.

Use low beam headlights.

Run the windshield wipers.

Drive on the shoulder.

If you must drive in fog, you should use your low beam headlights.

4 . You must put out emergency warning devices within ____ of stopping on the side of the road.

One minute

10 minutes

45 minutes

Two hours

If you must stop on the shoulder of a road, put out your emergency warning devices within 10 minutes of stopping. When pulling off the road to stop, be sure to turn on your four-way emergency flashers.

5 . Which factor does not have an impact on a person’s blood alcohol concentration (BAC)?

The number of alcoholic drinks consumed

How quickly the alcoholic drinks were consumed

The weight of the drinker

The temperature of the drinks

The three main factors that determine a person's blood alcohol concentration (BAC) are the amount of alcohol consumed, how quickly the alcohol is consumed, and the person's weight.

6 . Air brakes are:

An effective tool for stopping large vehicles.

Prohibited on large vehicles.

Only effective in poor weather.

A tool to improve fuel efficiency.

As long as the brakes are properly maintained, using air brakes is a safe and effective method of stopping large, heavy vehicles.

7 . Before driving a vehicle with air brakes, you should ensure that the spring brakes come on automatically when:

Air pressure falls below 45 psi.

Air pressure falls below 20 psi.

Driving downhill.

Driving uphill.

Before driving a vehicle with air brakes, you should ensure that the spring brakes come on automatically when air tank pressure falls to a level between 20 and 45 psi. You can do this by chocking the wheels and releasing air from the braking system by stepping on and off the brake pedal. Once the pressure drops to an unsafe level, the parking brake valve should pop out and spring brakes should come on.

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2024 District Of Columbia | Frequently Asked Questions

To acquire a CDL Passenger endorsement in the District of Columbia, you must first hold a valid CDL. You then need to pass a written passenger endorsement test and a skills test in a vehicle similar to the one you'll be driving. The test covers topics like vehicle inspection, loading/unloading passengers, and emergency procedures.

To obtain a CDL Passenger license in the District of Columbia, an applicant must possess a valid CDL, pass the Passenger Transport written test, complete a Federal Motor Carrier Safety Administration medical examination, and successfully pass a skills test in the type of vehicle similar to the one they will be driving. The applicant must also be at least 21 years old.

Yes, specific training is necessary to earn a CDL Passenger endorsement in the District of Columbia. You must pass a written passenger endorsement test and a skills test in a vehicle similar to the one you'll be driving. While not mandatory, practical experience driving similar vehicles can be beneficial for passing the skills test.

Yes, to secure a CDL Passenger endorsement in the District of Columbia, you are required to pass a written passenger endorsement test. This test covers topics such as vehicle inspection, loading/unloading passengers, and emergency procedures. It is designed to ensure you have the necessary knowledge to safely operate a passenger vehicle.

During the CDL Passenger endorsement skills test, you'll need to demonstrate your ability to safely operate a passenger vehicle. This includes pre-trip vehicle inspection, proper use of mirrors and signals, safe lane changes and turns, proper loading/unloading procedures, and emergency protocol. Your ability to control and maneuver the vehicle in various traffic situations will also be assessed.

No, it is illegal to transport passengers without holding a valid CDL Passenger endorsement in the District of Columbia. A CDL Passenger endorsement is required to operate a commercial vehicle that is designed to transport 16 or more passengers, including the driver. Failure to have the proper endorsement can result in fines and penalties.

Yes, you can add the CDL Passenger endorsement to your existing commercial driver's license. You don't need a new application. However, you must pass the Passenger endorsement written test and a skills test in a passenger vehicle. Remember to bring your current CDL to the DMV when you go for your tests.

Yes, there are specific restrictions for drivers with a CDL Passenger endorsement. For instance, you cannot transport more passengers than your vehicle is designed to carry. Additionally, you are subject to stricter blood alcohol content (BAC) limits and may be disqualified for serious traffic violations or multiple minor violations.

Yes, there are age-related prerequisites and limitations for acquiring the CDL Passenger endorsement in the District of Columbia. To obtain the endorsement, you must be at least 18 years old. However, if you plan to transport passengers across state lines or operate a vehicle with hazardous materials, you must be at least 21 years old. Additionally, certain medical and physical requirements must be met to qualify for the endorsement.

With a CDL Passenger endorsement, you'll be eligible to operate vehicles such as buses, shuttles, or any other vehicle designed to transport 16 or more passengers, including the driver. This includes school buses if you also have a School Bus endorsement. It's important to note that the specific vehicle must match the class of your CDL.