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South Dakota 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 South Dakota 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.
You have made error so far
Passing grade —
4 or fewer errors
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1.
A person working on a disabled vehicle on the shoulder of a road:
Will likely pay attention to traffic on the road.
May be focused on the repair and not paying attention to roadway traffic.
Is exempt from traffic laws.
Should not be assisted.
2.
Convex mirrors:
Cannot be used on vehicles transporting hazardous materials.
Are illegal in most states.
Can help drivers see a larger area.
3.
Brake fade is a result of:
Brakes being exposed to sunlight.
Brakes being exposed to moisture.
Excessive use of the brakes.
4.
On a leaf spring, the leaves:
May be broken.
Are not required.
Should not be broken.
Should shift.
5.
When checking windshield wiper blades, they should be:
Soft.
Secure.
Brittle.
6.
If planning to change lanes, your mirrors should:
Not be checked.
Be checked as usual.
Be checked more often than usual.
7.
Water on bridges:
Usually freezes before water on other parts of a roadway.
Usually freezes after water on other parts of a roadway.
Will not freeze.
Is not a concern in cool weather.
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