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District Of Columbia CDL Permit Test - Double

Number of questions: 20
Passing score: 16
Directions: This endorsement is required if the driver will pull two or three trailers. To receive this endorsement, applicants must pass a test. The test consists of 20 multiple choice questions. To pass, the applicant must answer at least 16 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: Driving Safely, Air Brakes (if applicable), Combination Vehicles and Doubles and Triples. The Double/Triple endorsement can be used with the Class A CDL.
You have made error so far
Passing grade —
4 or fewer errors
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1.
When driving in fog, you should:
Use your horn.
Use the low beam lights.
Use the high beam lights.
Use the heater.
2.
A convex mirror is sometimes called a ____ mirror.
Bug-eye
Square
Helper
3.
If your trailer beings to drift off course while you are backing, you should:
Continue trying to back up without stopping.
Turn the top of your steering wheel in the direction of the drift.
Turn the top of the steering wheel in the direction opposite of the drift.
Return the steering wheel to the 12 o’clock position.
4.
If someone pulls out in front of you and you cannot stop to avoid a crash, you should:
Just hit the other vehicle since it will be the other driver's fault.
Swerve to avoid the other car.
Put your vehicle in reverse.
Accelerate.
5.
If a roadway is covered by fog, it is best for you to:
Drive faster than usual.
Use your high beam headlights.
Turn off your headlights.
Avoid driving.
6.
How should you brake if your vehicle loses its ABS?
Brake normally.
Pump the brake repeatedly.
Push the brake pedal down as hard as you can.
Avoid using the brakes.
7.
Bent lock rings:
Are acceptable.
Are not a concern in dry weather.
Are dangerous.
Can lengthen tire life.
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