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Drivers who want to drive combination vehicles must pass the combination vehicles test. The Mississippi CDL combination test consists of 20 questions, and you'll need at least 16 correct answers to pass (80%). The test covers the combination vehicles section of the Mississippi CDL Manual. Take this practice test now to prepare for the actual MS CDL combination test!
1. Before transporting sealed loads, you should check:
that you don't exceed gross weight and axle weight limits.
the special transit permit.
a small sample of whatever is inside.
None of the above.
2. When you turn suddenly while pulling doubles, which trailer is most likely to turn over?
The front trailer is twice as likely to turn over as the tractor.
The rear trailer is twice as likely to turn over as the tractor.
All trailers are equally likely to turn over.
None of the above.
3. It's important to be sure that the fifth-wheel plate is greased as required. Why?
To improve traction.
To reduce heat and noise.
To prevent braking problems.
To prevent steering problems.
4. You are checking the tractor-trailer connection to make sure it is safe and secure. The landing gear should be:
fully raised.
raised slightly off the ground.
fully lowered.
None of the above.
5. An item that is 15 feet long placed on a flatbed trailer should have at least:
2 tie-downs.
1 tie-down.
15 tie-downs.
3 tie-downs.
6. When backing a tractor under a trailer:
the trailer will be lifted slightly when the tractor backs under it.
the fifth-wheel will come out from under the trailer.
the end of the kingpin will be even with the top of the fifth wheel.
you should lift the trailer off the fifth-wheel.
7. Headlights:
should be out of adjustment.
must be turned on a half hour before sunset to a half hour after sunrise.
can blind other drivers.
should not be used when driving at night.
8. Transporting hanging meat requires special attention. Why?
Because you have to drive fast to get it delivered fresh.
Because refrigerated trucks have less traction.
Because hanging meat can be an unstable load with a high center of gravity.
All of the above.
9. The posted speed limit:
should never be exceeded.
is only a suggestion.
may only be exceeded when driving in rural areas.
should only be exceeded when passing other vehicles.
10. The emergency air line:
controls the emergency brakes on combination vehicles.
supplies air to the trailer air tanks.
causes the tractor protection valve to close when the emergency line loses pressure.
All of the above.
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MS CDL Combination Test

Number of questions: 20
Correct answers to pass:16
Passing score:80%
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