District Of Columbia CDL Permit Test - Class A

Number of questions: 50
Passing score: 40
Directions: This license is required for driving any legal combination of vehicles, with a gross combination weight rating of 26,001 pounds or more, provided the GVWR of a trailer exceeds 10,000 pounds To receive this license, applicants must pass a 50-question test. To pass, applicants must answer 40 questions correctly. Each question has four possible answer choices. Test questions come from the Washington D.C. Commercial Driver License Manual. Questions come from chapters covering: Introduction, Driving Safely, Transporting Cargo Safely, Air Brakes (if applicable), Combination, Doubles and Hazardous Materials. Endorsements that may be used with a Class A CDL are: Hazardous materials, Tank, Passenger, HazMat and Tank, Air Brakes and School bus.
You have made error so far
Passing grade —
10 or fewer errors
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1.
If the spring brakes are on, what should you never do?
Push the brake pedal down
Open the hood
Release air from the air storage tanks
Open the door to the cab
2.
What is a thin layer of ice that forms on road surfaces?
White ice
Black ice
Green ice
Blue ice
3.
When should you check and adjust your mirrors?
Before you start a trip
While driving
After a trip
Mirrors should not be adjusted
4.
When driving a vehicle, rough acceleration is:
Encouraged at slow speeds
Encouraged at all speeds
Discouraged as it may cause damage to the vehicle
Discouraged because it can confuse other drivers
5.
A CMV should:
Not have a fire extinguisher unless transporting hazardous materials
Not have a fire extinguisher unless the vehicle will be traveling through remote areas
Not have a fire extinguisher
Have a fire extinguisher or other emergency equipment
6.
If unsure whether a trailer has ABS, you can:
Look under the trailer for wheel speed sensors coming from the back of the brakes
Try driving on a slippery surface and seeing ABS kicks in
Assume it does have ABS
Remove a tire and look for the ABS sensor on the axle
7.
Regardless the size of the cargo, it should have at least how many tie-downs?
1
2
3
4
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