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True
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|
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False
|
South Carolina CDL Permit Test - Double
(From the 2019 South Carolina CDL driver handbook)
| 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 two, three or four possible answer choices. Test questions come from the South Carolina 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.
Passing grade —
4 or fewer errors
advertising
1.
Driving outside of your lane may be a sign of fatigue.
2.
Which of the following is not a cause of hydraulic brake failure?
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Loss of hydraulic pressure
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Brake fade on long hills
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Downshifting
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3.
Without engine oil:
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The vehicle will get the best possible gas mileage.
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|
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The engine can be destroyed quickly.
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|
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ABS will not work properly.
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The windshield wipers will not operate.
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4.
When entering a curve, you should:
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Get off the roadway.
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Use the shoulder.
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Downshift.
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Take the vehicle out of gear.
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5.
If using spring brakes when hauling a heavy load, a complete stop will:
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Be impossible.
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Take a long time.
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Take a short amount of time.
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6.
One way to prevent drowsiness while driving is to:
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Drive alone.
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Avoid regular exercise.
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Get adequate sleep the night before the trip.
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7.
The trailer hand valve should be used:
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To test the trailer brakes.
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To check the connection between the trailer and tractor.
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To accelerate.
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To test the lights on the trailer.
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