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A type of warning system
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A tube used to move air from the compressor to the tanks
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A noise made by air brakes when used
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A part within the braking unit that allows air to move freely
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District Of Columbia CDL Permit Test - Knowledge Test Class A
(From the 2021 District Of Columbia CDL driver handbook)
| 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.
Passing grade —
10 or fewer errors
advertising
1.
What is a wig wag?
2.
Which of the following is not a sign of fatigue?
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Ability to focus
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Daydreaming
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Yawning repeatedly
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Drifting from your lane
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3.
What should happen if the air pressure in the braking system's air tanks falls below 60 psi?
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The warning light will come on.
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The vehicle will not shift out of gear.
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The front lights will flash.
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The steering wheel will lock up.
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4.
Which of the following is not a sign of bad brake drums or shoes?
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Cracked drums
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Pads with oil on them
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Shoes worn thin
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Shoes that are not covered in brake fluid
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5.
If you’re not sure how to handle a fire, you should:
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Use water.
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Stay inside the vehicle.
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Wait for the firefighters.
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Keep the vehicle running.
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6.
On newer vehicles, how do you put on the parking brake?
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Move a lever to the right.
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Push in the yellow, diamond-shaped knob.
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Pull out the yellow, diamond-shaped knob.
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Pull up on the steering column.
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7.
In bad weather, many drivers:
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Like to drive in front of trucks.
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Like to be on the side of trucks.
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Like to follow trucks.
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Like to drive without using their lights.
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