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
When using mirrors while driving, you should:
Look in the mirrors quickly.
Look in the mirrors for extended periods of time.
Use only the rearview mirror.
Use only the driver’s side mirror.
While driving, you should:
Develop plans to get out of any dangerous situation that could arise.
Enjoy the scenery.
Never look at the mirrors.
Focus on your own driving and not worry about other drivers.
A sign that your vehicle's brakes will need repair is that the:
Brake pads are not covered in grease.
Brake pads are not covered in oil.
The brake pads are worn thin.
When approaching your vehicle as part of your pre-trip inspection, you should look for what as a sign of trouble?
A puddle of oil under the vehicle
Inflated tires
Lights that are not cracked
To stop a vehicle using air brakes:
The brake pedal should be depressed.
The brake pedal should be lifted.
The brake knob should be pulled out.
The brake knob should be pushed in.
If you don't know if there is enough space for your vehicle to pass under a bridge, you should:
Speed up.
Swerve back and forth.
Slow down.
Drive on the shoulder.
When stopped on the side of the road, the driver should:
Keep their side door open.
Turn on their emergency flashers.
Wave their arms.
Turn off all their lights.
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