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Directly in front of the trailer.
|
|
|
Directly next to the trailer.
|
|
|
Parallel with the trailer.
|
Delaware CDL Permit Test - Combination
(From the 2021 Delaware CDL driver handbook)
| Number of questions: | 20 |
| Passing score: | 16 |
Directions:
All applicants who are applying for a Class A CDL should be prepared to take the Combination test. This test covers information found in Section 6 of the State of Delaware Commercial Driver License Manual. Section 6 provides the information needed to safely operate tractor-trailers, doubles, triples, and straight trucks with trailers. The test is made up of 20 multiple-choice questions, and applicants will need to correctly answer a minimum of 16 questions to pass. The Combination test is not a replacement for the Double/Triple endorsement test.
Passing grade —
4 or fewer errors
advertising
1.
When backing up while coupling a trailer, the tractor should be positioned:
2.
If oil and water build up in your vehicle's air tanks, the brakes:
|
May not work correctly.
|
|
|
May feel squishy.
|
|
|
Will squeal loudly when used.
|
|
|
Will be extremely sensitive.
|
3.
A shut-off valve:
|
Is located on the front of a trailer.
|
|
|
Is located on the instrument panel.
|
|
|
Prevents air from escaping an air brake system.
|
|
|
Should always be open.
|
4.
Using the trailer hand brake while experiencing a trailer jackknife will:
|
Stop the skid.
|
|
|
Straighten the trailer.
|
|
|
Increase traction.
|
|
|
Continue the skid.
|
5.
When testing ____, you should apply your vehicle's brakes with the hand control while moving the vehicle forward slowly.
|
The Anti-Lock Braking System
|
|
|
The emergency braking system
|
|
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The trailer service brakes
|
6.
The ____ trailer is the most likely to turn over if a driver takes a turn too quickly.
|
Front
|
|
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Last
|
|
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Middle
|
7.
Proper coupling technique:
|
Is the same on all vehicles.
|
|
|
Is essential to the safe operation of a vehicle.
|
|
|
Includes ensuring that the fifth wheel plate is not greased.
|
|
|
Can be learned over time.
|
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