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Mississippi 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 Mississippi Professional Driver’s Manual. Questions come from chapters covering: Driving Safely, Transporting Cargo 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.
If the safety relief valve in an air brake system is releasing air:
You should not be concerned as this is a normal process.
There is something wrong with the brakes.
The valve is operational.
2.
If you don't know if there is enough space for your vehicle to pass under a bridge, you should:
Speed up.
Swerve back and forth.
Slow down.
Drive on the shoulder.
3.
After a vehicle is started, warning lights and buzzers:
Should stay on for several minutes.
Should turn off within a few seconds.
Should stay on until manually turned off.
Should remain on.
4.
Texting while driving should:
Only be done on straightaways.
Only be done in curves.
Not be done.
5.
Brake fade is a result of:
Exposure to sunlight.
Exposure to moisture.
Excessive use.
Not using the brakes enough.
6.
Using a helper when backing is:
Encouraged.
Discouraged.
Illegal in most states.
Usually a cause of problems.
7.
A ramp's posted speed limit:
Is suitable for all vehicles.
Is suitable for some vehicles, but may be too fast for a large CMV.
Is just a suggestion and may be exceeded.
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