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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.
Driving too fast:
Is a major cause of fatal crashes.
Can be a good way to get to your destination quickly.
Should only be done if the roadway is dry.
Is acceptable in light traffic.
2.
How soon after starting a trip must cargo securement be checked?
After 50 miles
After 100 miles
After 250 miles
3.
How can you check for a leak in hydraulic brakes?
Pump the brake pedal three times, then hold down the pedal for five seconds. If the pedal moves, there may be a problem.
Push the brake pedal down as far as possible and release. If the brake pedal returns to its normal position, there may be a problem.
Push the brake pedal down as far as possible and release. If the brake squeaks, there may be a problem.
4.
To make a stop in a vehicle equipped with air brakes, the driver should:
Press the brake pedal down.
Lift the brake pedal up.
Pull out the air brake knob.
5.
When pulled over to the side of the road, you should:
Rely on your taillights to alert other motorists to your presence.
Not worry about other motorists.
Use your four-way emergency flashers to alert other motorists to your presence.
6.
Who may operate a vehicle that requires placards to be driven?
Any driver with a CDL
A driver with a hazardous materials endorsement
A driver with a minimum of 10 years of commercial driving experience
Any person who thinks they can
7.
When backing, a helper:
Should be used whenever possible.
Often adds to the confusion of backing.
Should only be used if the driver is not feeling confident.
Would likely get in the way.
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