mississippi
CDL Practice Test

If you’re preparing for the Mississippi CDL test you’ve come to the right place. This site can work as a study guide as you prepare to take the Missouri CDL Test and obtain your Missouri CDL. These practice tests are free so you can take them as many times as you need to and as you look to obtain your Missouri CDL. You will be presented with 40 questions and you must answer 34 questions correctly to pass. There is a 50-minute time limit. You may not go back once you answer a question. Click the "Start Test" button below to begin.

1 / 40

Select the true statement about slack adjusters:

they do not ever need to be adjusted

they should move a minimum of 2 inches from the push rod attachment

they should only be adjusted by a mechanic that is certified in slack adjusters

they can be adjusted automatically or manually

2 / 40

Select how brakes work on long, steep downgrades:

they are a supplement to the braking effect of the engine

it is the main braking mechanism

it does not do anything

it's the main braking mechanism with the engine braking system available for emergency situations

3 / 40

When must a driver’s inspection report be completed?

All of these answers are correct.

At the end of each shift.

Only if defects are found.

Before driving your bus.

4 / 40

The school bus driver may be the only contact person from school system some parents meet. The percentage of such parents is as high as:

0.65

0.85

0.5

0.72

5 / 40

A shipper’s certification is best described as _____.

a paper certification given to the manufacturer from the shipper

a certification that the package has been prepared according to the rules when the shipper packages hazardous materials

a test for shippers that certifies that they are qualified to package hazardous materials

a paper certification from the manufacturer given to the shipper

6 / 40

If your engine runs a pump used during delivery of compressed gas, should you turn off the engine before or after unhooking hoses after delivery?

None of these answers are correct.

Turn it off during product transfer, while unhooking the hose.

Turn it off before product transfer, before you hook the hose.

Turn it off after product transfer, before you unhook the hose.

7 / 40

When does your vehicle's single brake system need an adjustment?

when the governor stops between 75-90 psi

if the compressor cuts out at between 70 and 90 psi

if the pressure builds from 50 to 75 psi in less than 3 minutes

when the pressure builds from 85 to 100 psi in less than 1 minute

8 / 40

Suspension systems:

keep the load secure

keep the steering wheel tight

keep the axles in place

keep the brake drums from failing

9 / 40

Commerical vehicles typically have this type of brake.

S-Cam brakes

rectangle brakes

drum brakes

stab brakes

10 / 40

When checking for_____you are looking for dripping fluids or puddles on the ground below the transmission or engine.

power steering fluid

air brake system

leaks

coolant level

11 / 40

Off-tracking happens when going around a corner and:

the rear wheels follow the front wheels in a straight path

the rear part of the trailer goes into the shoulder

the front part of the trailer pulls to the right

the rear wheels follow a different pathway than that of the front wheels

12 / 40

What is the correct number of red reflective triangles that you should carry?

seven

three

five

one

13 / 40

You should be in the proper gear before going down a hill because:

it helps control your speed better

water may build up in the air tanks if you do not rely on the engine brake

brakes may fail or fade from excessive heat due to relying on them too much and not using the engine brake effect

it builds up the air pressure in the air tanks

14 / 40

Under which two special conditions should you downshift?

before starting down a hill and before going up a hill

before entering a curve and before going up a hill

if there is an accident and in sudden heavy rain

before starting down a hill and before entering a curve

15 / 40

In what position should the converter dolly air tank drain valve be in for double trailer combination?

in a 1/3 open position

in an open position

in a halfway closed position

in a closed position

16 / 40

You should_____to make an emergency stop with air brakes when using the stab braking method.

apply a firm pressure to the brakes, release the brake pedal once the wheels lock and then apply pressure to the brakes onces the wheels start rolling again

rapidly and lightly pump the brake pedal

apply pressure to the brake pedal until the wheels lock and then stay off of the pedal for as long as the wheels are locked

apply a full hand valve until you stop and press firmly on the brake pedal

17 / 40

When backing your vehicle, which of the following is NOT recommended

back towards the right side

back as slow as possible

back and turn towards the driver's side

use the lowest reverse gear

18 / 40

The designation RQ identifies the material's:

Regulatory quantity

Regulatory quotient

Reference quotient

Reportable quantity

19 / 40

You must first______to supply air to the trailer.

turn off the engine so you can hear the brakes

cross the air lines to check for the presence of leaks

pull out the tractor protection valve

push in the tractor protection valve

20 / 40

This object should not have any missing parts, be fully raised, the crank handle is secured, and that there is no damage to the frame.

Lifts/doors/tires

Drop arm

Landing gear

Release arm

21 / 40

This object is required to be checked for damage, that it's secure, and strong enough to handle any cargo.

The fifth wheel

The header board

The platform

The apron

22 / 40

Which of the following statements about the bus interior is false?

If there is a red emergency door light, it must work.

Never drive with an open emergency exit door or window.

If you use your outside lights, you don't need to turn on red emergency door light.

The seats must be safe for riders all seats must be securely fastened to the bus.

23 / 40

When should you drain air tanks that do not have an automatic tank drain?

every 4 hours of the working shift

once every 7 days

at the end of each working day

once every 14 days

24 / 40

In what position should the shut off valves on a the rear of the front trailer be in on a set of double trailers?

in a closed position

in a halfway open position

in a 1/3 way open position

in an open position

25 / 40

A placarded vehicle must carry what type of fire extinguisher?

One with a rating of 10 a/b minimum.

One with a rating of 10 b/c minimum.

One with a rating of 5 a/b minimum.

One with a rating of 5 b/c minimum.

26 / 40

The cause of almost half of all truck driver deaths are:

a result of rollover

a result of excessive speed

a result of changing lanes too frequently

a result of following behind too closely

27 / 40

This object should not be worn dangerously thin where visible.

The air system lines

The brake chambers

All answers listed

The brake linings

28 / 40

While driving at night, which lights should you use as often as you can?

emergency flashers

low beams

high beams

novelty lights

29 / 40

With the controlled braking method, you _____?

repeatedly tap the brakes as fast as you can

apply the brakes as hard as you can without locking the wheels

apply the brakes all the way until the wheels lock up, release the brakes and apply them again when the wheels start to roll again

lightly apply braking pressure

30 / 40

What is the value of the overhead rear-view mirror inside of the bus?

To monitor passenger activity.

To monitor the driver's appearance.

To check blind spots.

To provide visibility directly in the back of the bus.

31 / 40

What is the service air line controlled by?

all answers listed

the relay valve that connects the trailer air tanks to the trailer air brakes

the pressure applied to the trailer hand brake or by the foot brake

the relay vavle by sending air pressure from the trailer air tank to the trailer brake chambers

32 / 40

What can side to side surge cause?

A roll over.

An increase in speed.

An engine system failure.

A spontaneous combustion.

33 / 40

What should you hear when you have the hand valve on and are testing the trailer brakes by opening the service air line at the back of the trailer?

the service brakes more to a fully applied position

the emergency line valve to release air

the engine brake to kick on

air leaving the open valve

34 / 40

What is the best way to figure out how many seconds of following distance you have?

wait until a vehicle passes a shadow or landmark, then count the seconds until you pass it

get 1/4 closer to the car in front of you, then back off again multiply how long this took you by 4 for following distance

text a friend and tell them to text you back in ten seconds and see how long that seemed to take compared to how far you traveled

use the stopwatch on your phone to try to determine how long before you reach a mile marker after the car in front of you appeared to reach it

35 / 40

What is a king pin?

it is a pin that locks the air brake lines together

it is a pin that locks the trailer to the tractor on the fifth wheel

it is a pin that a driver receives for being a safe driver

it is a pin that holds the wheel on to the axles

36 / 40

What is the standee line?

A 2 inch line down the aisle to help keep passenger traffic flowing.

A 2 inch line on the floor that all passengers must stay behind.

A line at the back of the bus where passengers must stand before exiting.

A line around each seat to help each passenger have a little personal space.

37 / 40

______is a device that connects the service and emergency air lines between the tractor and trailer.

Relay knife

Glad hands

Service lines

Top off valves

38 / 40

Which of the following three hazard classes should NOT be placed into a temperature-controlled trailer (one with a heater/air conditioner unit)?

Classes 1, 3, and 4

Classes 1, 3, and 6

Classes 1, 21, and 3

Classes 1, 4, and 51

39 / 40

How many different hazard classes are there?

40 / 40

Do converter dollies have spring brakes?

some do

none of the answers listed

yes

Your score is

The average score is 0%

5/5 - (1 vote)

CDL Category Practice Tests

CDL Practice Test

How To Get A mississippi Commercial Drivers License

Mississippi requires drivers of certain vehicles to obtain a commercial driver’s license or CDL. These commercial vehicles include single or combinations with a GVWR of 26,001 pounds, vehicles intended to carry 15 or more passengers excluding the driver, and any vehicles carrying hazardous materials that requires a placard. Any resident of Mississippi who currently holds a Class R license may apply for a commercial driver’s license. Every applicant will need two identifications of proof that they are indeed a resident of the state of Mississippi.Mississippi residents that are 17 years of age or older are eligible for a CDL for intrastate driving. Residents must be 21 years or older to have interstate CDL driving privileges and/or a Hazmat endorsement. All applicants must possess a Medical Examiner’s Certificate or DOT medical card.

There are certain offenses that will disqualify a driver from obtaining their CDL. These include:

Possessing a driver’s license from another state.
Conviction of impaired operation of a commercial motor vehicle within 24 months prior to your application.
Canceled, revoked, suspended, or denied license.
If you are disqualified from CDL privileges in another state.

CDL applicants for the state of Mississippi must complete both a written knowledge exam as well as a practical skills test to receive their license.

Endorsements
H – Hazardous Materials
K – Air Brake Restriction
T – Doubles/Triple Trailers
P – Passenger Vehicles
N – Tank Vehicles
X – Hazardous Materials and Tank Vehicles
S – School Buses

Hit the Open Road

mississippi CDL License Test Tips

All applicants will have to take one or more knowledge tests to acquire their CDL Class and necessary endorsements. Classes A, B, and C all require applicants to complete a 50 question written exam. Class A drivers will need to complete an additional 20 questions about combination vehicles. To remove the Air Brake Restriction drivers must pass a 25 question assessment. Endorsements require knowledge tests as well. Passenger, Double/Triples, and Tank Vehicle Endorsements each require a 20 question test. The School Bus Endorsement knowledge test is 25 questions and the HazMat Endorsement is 30 questions. All knowledge tests must be passed with a score of 80 percent or higher.

The practical skills test evaluates the applicant in three main areas. These include the pre-trip inspection, basic vehicle control, and on-road driving. The applicant must pass all of these areas in order to be eligible for their CDL. To receive the necessary endorsements, applicants must drive the type of vehicle they are seeking the endorsement for at the time of the practical skills assessment.

Additional Information

Information on the Mississippi Department of Public Safety

The Mississippi Department of Public Safety administers CDL license requirements in Mississippi. To get more information contact them via:

Website: https://www.driverservicebureau.dps.ms.gov/Drivers/Classes_A-D

Contact: 601.987.1551

Additional Mississippi CDL Helpful Links

Please use the links below to access more valuable Mississippi CDL testing resources and to learn more about practice driving tests for the state of Mississippi.

mississippi CDL Practice Test