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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.
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4 or fewer errors
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1.
When driving a vehicle equipped with an Anti-Lock Braking System (ABS), you should:
Stop harder than you would in a vehicle not equipped with ABS.
Use extra braking force to ensure the ABS kicks in.
Brake as you would in a vehicle not equipped with ABS.
Brake with less force than you would in a vehicle not equipped with ABS.
2.
When inspecting the exhaust system, which of the following should not cause concern?
Loose or broken exhaust pipes
Loose or broken mounting brackets
Leaking exhaust system parts
Exhaust system parts that are not rubbing against fuel system parts
3.
If there is ice on the front of your side mirror:
You should exit the roadway.
You can expect ice to be on the roadway.
There will not be ice on the roadway.
4.
Why should the steps of a pre-trip inspection be done in the same order each time?
You will be less likely to forget a step.
You will get faster.
It is required by law.
The form must be followed in order.
5.
When should the trailer hand valve be used?
Only when the trailer is carrying a load
Only to test the trailer’s brakes
Only in inclement weather when the trailer may skid
6.
When driving in fog, you should:
Use your horn.
Use the low beam lights.
Use the high beam lights.
Use the heater.
7.
When near a railroad crossing:
You should expect to hear every approaching train.
You may not hear a train, even if one is approaching.
You will hear two short blasts of a train's horn if a train is approaching.
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