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Delaware 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 three or four possible answer choices. Test questions come from the State of Delaware 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.
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Passing grade —
4 or fewer errors
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1.
Antifreeze helps to keep an engine functioning properly:
But only if it is cold outside.
To be more fuel efficient.
Both when it is cold and hot outside.
2.
When turning, when should the turn signal be canceled?
Before entering the turn
During the turn
After the turn is completed
3.
When backing up, follow a turning trailer by:
Changing nothing. The vehicle will naturally follow the trailer.
Changing the direction of the steering wheel.
Turning the steering wheel even harder in the direction that it is already turning.
4.
How can you tell if a converter dolly is equipped with anti-lock brakes?
The dolly is marked with a sticker displaying the letters "ABS."
There is a plaque on the side of the dolly containing the information.
There is a yellow lamp on the left side of the dolly.
5.
If you plan to slow down, you can warn drivers behind you by:
Slamming on the brakes.
Tapping the brakes a few times and before braking.
Turning on one set of turn signals.
Putting your hand out the driver's side window and waving.
6.
Service brakes should:
Be tested once a month.
Only be tested by a trained mechanic.
Be tested before every trip.
7.
To stop in a vehicle that uses air brakes, the driver should:
Pull the air brake lever.
Engage the brake lever.
Push the brake pedal down.
Pull the brake pedal up.
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