|
Activate the emergency brakes.
|
|
|
Deactivate the air brakes.
|
|
|
Sound the horn.
|
|
|
Supply the trailer with air.
|
South Dakota CDL Permit Test - Combination
(From the 2021 South Dakota 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 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.
Push in the trailer air supply control to:
2.
Rollovers are most likely to happen when:
|
Drivers turn too fast.
|
|
|
Driver turn too slowly.
|
|
|
It is windy.
|
|
|
It is raining.
|
3.
Which of the following types of vehicles is most prone to the “crack-the-whip" effect?
|
An automobile
|
|
|
A three-axle tractor
|
|
|
A bobtail tractor
|
|
|
A triple combination
|
4.
All trailers made after ____ must be equipped with Anti-Lock Braking Systems (ABS).
|
1943
|
|
|
1998
|
|
|
2009
|
5.
Pull out the trailer air supply control to test:
|
The parking brake.
|
|
|
The trailer emergency brakes.
|
|
|
The trailer service brakes.
|
|
|
The landing gear.
|
6.
What is another name for the service line?
|
The control line
|
|
|
The utility line
|
|
|
The open line
|
|
|
The parallel line
|
7.
A trailer that is too high:
|
May not couple correctly.
|
|
|
Will couple securely.
|
|
|
Is not an issue.
|
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