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Mississippi Air Brakes Test

You'll need air brake knowledge to haul timber through the Pine Belt or cotton through the Delta—our practice test gets you ready.

118
Questions
80%
To Pass
30
Minutes

118 questions · 30 min time limit · 80% to pass

Opens in a practice window — choose your mode inside.

JM

Reviewed by Jack Mahana, CDL Instructor (13+ years)

Last verified: August 2026

All questions sourced from the official Mississippi CDL handbook and FMCSA regulations.

About the Mississippi Air Brakes Test

Mississippi's roads demand drivers who know their air brakes inside and out. Whether you're running logs out of the Delta or hauling poultry across I-55, a brake failure isn't an option. The humidity and heat here can mess with your air system. You need to spot problems before they start.

Our Mississippi Air Brakes practice test mirrors the actual DMV exam. You'll face 25 questions on brake components, emergency procedures, and inspection routines. Each question comes from the Mississippi CDL handbook. We give you the right answer and explain why it's correct.

Don't waste time studying stuff that won't show up. We focus on what matters for Mississippi drivers: logging trucks on gravel roads, long descents on I-20, and the stop-and-go of Gulfport's port traffic. Pass this test, and you'll be ready for the real thing.

Topics Covered

✓Brake system components – know your compressor, reservoirs, and brake chambers for safe operation on rural Mississippi highways
✓Air compressor and governor – Mississippi's heat and humidity can cause compressor failure; learn to check it
✓Brake adjustment – critical for logging trucks on steep, winding roads in the Pine Belt
✓Dual air brake systems – common on modern rigs; you need redundancy to stop safely on I-55
✓Parking brakes – essential for parking on slopes in Mississippi's hill country without rolling
✓Emergency brake systems – sudden stops happen on busy highways like I-20; know your emergency procedures

Study Tips

Study the Mississippi CDL handbook's air brake section twice. Focus on the braking distance charts and the inspection checklist – those are gold for the test. Practice with our free test until you consistently score 90% or higher.

When you schedule your Mississippi DMV appointment, bring your permit, a valid ID, and your application form. The air brakes knowledge test costs $10. You don't need a vehicle – it's a written exam. Arrive 15 minutes early. No cell phones or electronic devices allowed in the testing area.

Mississippi Specific Information

Mississippi offers the air brakes knowledge test at any CDL testing location. Major test centers include Jackson (Meadowbrook Rd), Biloxi (Lamey Bridge Rd), and Columbus (Wood Dr). You must make an appointment – walk-ins aren't accepted. Book through the Mississippi Department of Public Safety website or call your local office.

The test fee is $10 if you take it separately. If you include it with your full CDL skills test, the fee is built in. You need a valid Commercial Learner's Permit (CLP) before taking the air brakes endorsement test. After passing, the endorsement stays on your CDL for 5 years.

Mississippi uses third-party testers for the skills portion, but the air brakes written test happens at MDPS exam stations only. Bring your CLP, social security card, and proof of Mississippi residency. No – you can't take the test online; it's in-person.

Frequently Asked Questions

Do I need a separate air brakes endorsement in Mississippi?
Yes. If your vehicle has air brakes, you need the "L" endorsement on your CDL. You'll pass a written knowledge test to get it.
How many questions on the Mississippi air brakes test?
The test has 25 questions. You need at least 20 correct (80%) to pass. It's multiple choice.
Can I take the Mississippi air brakes test in Spanish?
No. Mississippi offers CDL knowledge tests in English only. You'll need to read and understand the handbook in English.
Where can I take the air brakes test in Mississippi?
At any MDPS exam station. Major ones are in Jackson, Biloxi, Tupelo, and Columbus. You must book an appointment first.
How long is the air brakes endorsement valid?
It's valid for 5 years, same as your CDL. You'll renew it when you renew your license.
JM

Reviewed by Jack Mahana, CDL Instructor (13+ years)

Last verified: August 2026 · FMCSA-compliant content