Delaware Driver’s Examination

Double

This endorsement is required if the driver will pull two or three trailers. To receive this endorsement, applicants must pass a..

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.

Number of Question
Passing Score

All air tanks must include:

Explanation
Air brake system tanks must contain drain valves. These valves are used to drain accumulated oil and water from the tanks and may be either manually or automatically operated.

Most drivers are the least alert:

Explanation
Fatigue and lack of alertness are major hazards when driving at night. Most people are the least alert at night, especially after midnight.

When coupling together two trailers, you can secure the second trailer by:

Explanation
If you are attaching a second trailer to a combination but the trailer is not equipped with spring brakes, you can set the trailer emergency brakes. You can do this by connecting the first and second trailers' emergency lines, charging the air tank, then disconnecting the emergency lines. This should set the emergency brakes, as long as the slack adjusters are properly adjusted.

When checking its automatic transmission fluid, the vehicle:

Explanation
Your vehicle's engine may need to be running in order for you to check the level of its automatic transmission fluid.

To avoid becoming an aggressive driver, you should:

Explanation
To avoid becoming an aggressive driver, begin a trip with realistic expectations of how long the trip will take, allowing extra time for traffic delays. Do not tailgate other vehicles. To avoid upsetting other drivers, do not drive slowly in the left lane and do not gesture at the drivers (even in seemingly minor ways, like shaking your head).

When backing with a trailer, turning toward the driver’s side is encouraged because:

Explanation
When driving in reverse, it is always recommended that a driver backs their vehicle toward its left side. This will allow the driver the best possible view of the rear of their vehicle.

Roads are slippery when it first begins to rain because:

Explanation
Roads are especially slippery when it first begins to rain. Rain water initially mixes with oil and grease on the road to form a slippery film. As the rain continues, this mixture will eventually wash away.
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