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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.
When should you check and adjust your mirrors?
Before starting a trip
While driving
After a trip
Mirrors do not need to be adjusted.
2.
A commercial motor vehicle should:
Not be equipped with a fire extinguisher, unless transporting hazardous materials.
Not be equipped with a fire extinguisher, unless the vehicle will be traveling through remote areas.
Never be equipped with a fire extinguisher.
Always be equipped with at least one fire extinguisher.
3.
Accelerating roughly is:
Encouraged at slow speeds.
Encouraged at all speeds.
Discouraged, as it may cause damage to the vehicle.
Discouraged, as it may confuse other drivers.
4.
Regardless the size of the cargo, it should be secured by at least ____ tie-down(s).
One
Two
Three
Four
5.
A thin layer of ice that forms on road surfaces is called:
White ice.
Black ice.
Green ice.
Blue ice.
6.
If unsure if a trailer is equipped with ABS, you can:
Check under the trailer for wheel speed sensors coming from the back of the brakes.
Try driving on a slippery surface and see if ABS kicks in.
Assume it does have ABS.
Remove a tire and look for the ABS sensor on the axle.
7.
If the spring brakes are activated, you should never:
Push down the brake pedal.
Open the hood.
Release air from the air storage tanks.
Open the door to the cab.
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