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One-half or more.
|
|
|
About one-third.
|
|
|
About one-quarter.
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Louisiana CDL Permit Test - Double
(From the 2020 Louisiana 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 three possible answer choices. Test questions come from the Louisiana Commercial Driver License Manual. Questions come from chapters covering: Transporting Cargo, 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.
When driving on packed snow, you should reduce your speed by:
2.
After a tire has been changed, the driver should stop after a short distance of driving to:
|
Recheck the tightness of the lug nuts.
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|
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See if rocks have gotten into the tread.
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Polish the tire.
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3.
Bridges usually freeze:
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Only once temperatures drop significantly below 32 degrees Fahrenheit.
|
|
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After all other surfaces.
|
|
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Before other surfaces.
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4.
To help prevent a rollover, cargo should be:
|
Placed as high as possible inside a trailer.
|
|
|
Placed as low as possible inside a trailer.
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Placed on the driver’s side of a trailer.
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5.
An emergency brake must be controlled by:
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Mechanical force.
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Air pressure.
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Gravity.
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6.
When changing lanes, turn signals:
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Should not be used.
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|
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Should only be used if a vehicle is close to you.
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Should be used each time.
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7.
In a dual air brake system:
|
Air tanks are shared between both systems.
|
|
|
Each system has its own air tanks.
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|
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You must designate which system you are using.
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