Air Brakes #1
Air Brakes Endorsement Test | Mississippi 2024 #1 Page 4 of 4
Train for FREE online with our Mississippi CDL air brake test. The official exam test consists of several obligatory parts, with all of them checking your knowledge of different blocks of road rules. If you need to obtain a MS Class A/Class B driver license in 2024, practice as much as possible. Free sample tests published on our website will help you check and improve your knowledge and boost your grades. Please bear in mind that the requirements for CDL may vary from state to state.
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19 . What happens if the air pressure in a system's air tanks falls below 60 psi?
The vehicle should stop.
In an air brake system, a low pressure warning signal should activate if the pressure in the air tanks falls to a level below 60 psi. This signal may be in the form of a warning light or a wig wag.
20 . Which part of the truck is the air compressor connected to?
The door latch
In an air brake system, the air compressor is connected to the engine through gears or a v-belt.
21 . Front wheel braking works:
Under most conditions.
Front wheel braking is effective under all road conditions. It is unlikely that you will experience a front wheel skid, even on ice.
22 . During a static leakage test, what is the maximum leakage rate that is safe for a double combination vehicle?
When performing a static leakage test on a double combination vehicle with air brakes, the leakage rate should be no more than 3 psi in one minute. If the air leaks from the air brake system at a quicker rate, the vehicle should not be driven because something likely needs to be repaired.
23 . At what psi is the safety valve set to open?
500 psi
In an air brake system, the first tank that receives compressed air has a safety valve that releases air if the pressure gets too high. It is usually set to open at 150 psi. If the valve must open, there is a fault in the system that should be repaired by a mechanic.
24 . Brakes can get out of adjustment quickly, especially:
Brakes are particularly prone to getting out of adjustment if they are hot. Be sure to routinely check the adjustment of your brakes. For a vehicle to be safely controlled, all brakes must be properly functioning and adjusted.
25 . When traveling down a steep downgrade, the best way to use your brakes is to:
Apply consistent pressure to the brake pedal all the way down the hill.
On a long or steep downgrade, brakes should only be used to supplement the braking effect of the engine. Apply the brakes just enough to feel a definite slowing down, then release them once you are about 5 mph below your target "safe" speed. Once your vehicle reaches its safe speed again, repeat this process.
2024 Mississippi | Frequently Asked Questions
A CDL Class B license in Mississippi allows the holder to operate single vehicles with a Gross Vehicle Weight Rating (GVWR) of 26,001 pounds or more, or any such vehicle towing another not exceeding 10,000 pounds. This includes buses, farm labor vehicles, and any vehicle designed to transport 16 or more passengers (including the driver).
A Class B CDL license in Mississippi permits the operation of single vehicles with a Gross Vehicle Weight Rating (GVWR) of 26,001 pounds or more, or a vehicle towing another not exceeding 10,000 pounds. This includes straight trucks, large buses, segmented buses, box trucks (like delivery drivers and couriers), and dump trucks with small trailers.
To acquire a Class B CDL license in Mississippi, you must be at least 18 years old (21 for interstate driving), have a valid Mississippi driver's license, pass a vision exam, and successfully complete a general knowledge test. You'll also need to pass a skills test, which includes vehicle inspection, basic controls, and on-road driving. Finally, you must pass any relevant endorsement tests.
In Mississippi, you must be at least 18 years old to qualify for a Class B Commercial Driver's License (CDL) for intrastate operation (within Mississippi only). However, to operate a commercial vehicle across state lines (interstate operation), you must be at least 21 years old.
While not necessary for a basic Class B CDL, endorsements can expand the types of vehicles you may drive or the cargo you can carry. Endorsements include passenger (P), school bus (S), tanker (N), hazardous materials (H), and a combination of tanker and hazardous materials (X). Each endorsement requires passing specific tests.
The Class B CDL skills assessment in Mississippi encompasses three parts: pre-trip inspection, basic vehicle control, and on-road driving. The pre-trip inspection tests your knowledge on vehicle safety. Basic vehicle control evaluates your ability to maneuver the vehicle. On-road driving tests your skills in traffic situations, including left and right turns, intersections, railway crossings, and various types of lanes.
Class B CDL license holders in Mississippi are limited to driving single vehicles with a gross vehicle weight rating (GVWR) of 26,001 lbs or more, or towing a vehicle not exceeding 10,000 lbs GVWR. They can't operate Class A vehicles unless they upgrade their license. They're also restricted from driving vehicles requiring specific endorsements unless they've passed the necessary tests.
In Mississippi, the Class B CDL written test is typically offered in English. However, some locations may offer the test in Spanish. It's best to check with the specific testing location to confirm language options. It's important to note that all drivers must understand English to some degree, as federal law requires it for road communication.
Yes, you can request accommodations for the Class B CDL written exam if you have a disability. The Mississippi Department of Public Safety works to ensure all applicants have equal access to the testing process. It's essential to make your request well in advance of your test date to allow time for arrangements to be made.
If you don't pass the Class B CDL written test in Mississippi, you can retake it. However, you must wait at least one day before retaking the exam. There may be additional fees for each retest. It's recommended to study the CDL manual thoroughly before attempting the test again.