CDL AIR BRAKES PRACTICE TEST - MISSISSIPPI
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The air brakes endorsement applies to applicants who wish to drive a vehicle with air brakes in Class A, B, or C CDL. To drive a vehicle with air brakes, you must pass the air brake component of the Mississippi CDL knowledge test. The MS CDL air brakes test consists of 25 questions, and you'll need at least 20 correct answers to pass (80%). The test covers the information found in the air brakes section of the Mississippi CDL Manual. Take this MS CDL practice test now to prepare for the actual air brakes test!
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1.
Which of the following is not part of the air brake system?
Air compressor
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Air storage tanks
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Air filter
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Alcohol evaporator
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2.
Passive railroad crossings:
have at least one traffic control device.
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should never be crossed using a CMV.
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do not have traffic control devices.
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usually have a person directing traffic.
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3.
Why must air tanks be drained?
There might not be enough antifreeze in the system.
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Your transmission fluid may drain out.
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The water can freeze in cold weather and cause brake failure.
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The alcohol evaporator might stop working.
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4.
If you are being tailgated, you should:
flash your brake lights.
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increase your following distance.
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speed up.
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move to the left lane.
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5.
The alcohol evaporator:
eliminates the need for daily air tank drainage.
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shows how much air pressure you are applying to the brakes.
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ensures the coolant temperature gauge remains in the normal range.
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helps to reduce the risk of ice in air brake valves and other parts in cold weather.
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6.
Under a pressurized system, the radiator cap:
should always be cool.
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should never be removed until the system has cooled.
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should never be hot.
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should be removed when the coolant is hot.
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7.
The space under a heavily loaded vehicle can be very small. This can cause problems:
on unpaved yards.
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when crossing railroad tracks.
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on dirt roads.
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All of the above.
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8.
Before driving a vehicle with a dual air brake system, you should allow time for the air compressor to build up a minimum of ____ pressure in both the primary and secondary systems.
50 psi
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150 psi
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35 psi
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100 psi
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9.
The wig wag is:
a low air pressure warning system.
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a noise reduction mechanism.
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when your tires might grab unexpectedly and you lose control of your vehicle.
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a type of rollover.
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10.
Spring brakes:
will come fully on when air pressure drops to a certain range, typically 20 to 30 psi.
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will apply the brakes when a leak in the air brake system causes all the air to be lost.
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are usually held back by air pressure.
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All of the above.
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Frequently Asked Questions
In Mississippi, if you are enrolled in an approved driver education course, you can get a temporary learner’s permit at the age of 14. Once you reach the age of 15, you are eligible for a regular learner’s permit. After holding the learner's permit for one year, you qualify for an intermediate license. To obtain a regular driver’s license (class R), you must be at least 16 ½ and hold the intermediate license for six months. If you are 17 years old or older, there is no waiting period. You can obtain both the learner's permit and the driver's license on the same day.
You can schedule an appointment online for your DMV written test. Select dates and times based on your preferences and the available options at the various Mississippi driver license locations.
When applying for a driver’s license, you must bring the following documents:
- A completed application signed by your parent/guardian if you are under 17.
- Proof of identity (such as the birth certificate) and a legal document if you have changed your name.
- Proof of Social Security Number.
- Two proofs of residency (such as an utility bill, bank statements, or student ID card with your photo).
- A completed School Attendance Form if you are between 15 and 17 years old. For applicants under 18 and married, the form is not required, but they must present a marriage license.
Check the list of acceptable documents to ensure you have all you need.
To prepare for the DMV written test, you can refer to the official Mississippi Driver's Handbook. The manual covers various information about traffic laws, road signs, and safe driving practices. Study carefully the different sections and test your knowledge with our free practice tests!
With a learner’s permit, new drivers must always be accompanied by a licensed driver aged 21 or older, who sits next to them. For the first 6 months after obtaining the license or until reaching the age of 17, drivers cannot operate between 10 p.m. and 6 a.m. from Sunday to Thursday and between 11:30 pm and 6 am on Friday and Saturday, unless under supervision. For both learner’s permit and intermediate license holders, texting with a cell phone is forbidden.
In Mississippi, a temporary learner’s permit is valid until you have completed the driver education course. Instead, a learner’s permit is valid for two years. This ensures you have enough time to practice driving and fulfill the necessary requirements before the road test.
If you don't pass the DMV written test, you can repeat it the following business day. After three unsuccessful attempts, you need to wait for 30 days before you can retake the exam again. To enhance your chances of passing the permit test, sign up for DMV Premium, which provides useful resources for studying!
MS CDL Air Brakes Test
Number of questions: | 25 |
Correct answers to pass: | 20 |
Passing score: | 80% |
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