louisiana
CDL Practice Test

Below are test questions for the Louisiana CDL test. The site is free and you are able to take the practice test as many times as you need to. Questions in these practice tests cover questions from the Louisiana CDL manual and the Louisiana CDL study guide. The Louisiana CDL test contains 50 questions, of which candidates must answer 40 questions correctly to pass. 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 Quiz" button below to begin.

1 / 40

The direction of liquid movement not prevented by baffles is:

Back to front.

Bottom to top.

None of the answers listed.

Side to side.

2 / 40

Before backing under the trailer after connecting the air lines you should:

double check to make sure the trailer brakes are off

have a random pedestrian direct your path of travel

take a walk around the vehicle to make sure it is clear of obstructions

supply air to the trailer system and then pull the air supply knob out

3 / 40

It is good practice to_____when uncoupling.

make sure the electrical cable is hanging with the plug end down

have the glad hands coupled together

have the glad hands coupled to the dummy couplers

all answers are appropriate

4 / 40

How should the hand valve be used?

only when the trailer is loaded to its maximum weight

only when accompanied by the service brakes

to test the trailer brakes

only when accompanied by the foot brake

5 / 40

What is a passive railway crossing?

The type of crossing, which does not have any type of traffic control device.

The type of crossing with no cross buck sign.

The type of crossing on which the driver does not have to stop.

The type of crossing where you can pass the tracks without stopping.

6 / 40

Who is responsible for packaging, labeling, and preparing the hazardous material shipping papers for a common carrier?

The carrier

The shipper

The driver

Your spouse

7 / 40

Tires should should be replaced:

if the tread depth on your front tires is less than 4/32 deep

when there are broken valve stems

when the tread separates

all of these answers are correct

8 / 40

A placarded vehicle must carry what type of fire extinguisher?

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.

One with a rating of 10 a/b minimum.

9 / 40

What can you do at an accident site to help avoid another accident?

have a drink to calm your nerves

put out warning devices so people don't run into the accident site

stay in your vehicle and do nothing until help arrives

leave your vehicle, do nothing, and get to higher ground

10 / 40

You should brake on a long steep downgrade hill as a supplement to the braking effects of the engine

when the vehicle is runaway

yes

when the GVCW is above 20,000 lbs

11 / 40

When approaching railroad tracks, stop your bus:

15 and 50 feet before railroad crossings.

Only if you have manual transmission, then proceed with flashers on.

On the tracks so you can see if the train is coming.

5-10 feet before railroad tracks.

12 / 40

Bus drivers must have a CDL if they drive a vehicle:

That has a gross weight rating of more than 26,000 pounds.

Designed to seat more than 16 or more persons, including the driver.

That is designed to carry more than nine passengers.

That has air brakes.

13 / 40

Select the true statement in regards to an application pressure gauge:

it prevents the brakes from failing

it is connected to the generator

it shows how much air pressure you are applying to the brakes

when accelerating it releases air

14 / 40

The golden rule for school buses when approaching and crossing railroad tracks is:

Stop, look, and listen.

Stop, go, and stop.

Stop, look, and turn on the radio lights overhead.

None of these answers are correct.

15 / 40

If students must cross the street, when they get off the bus, which statement is true?

The student should wait to cross the street until the bus continues on its route.

If the bus is equipped with the crossing gate, the danger of running over the child is eliminated.

For crossing, students should make eye contact with the bus driver and wait for the driver's signal that it is safe to proceed.

When the driver signals that it is safe to proceed, the students must run across the street to reduce the exposure to danger.

16 / 40

Which of the following are possible causes of tire fires?

dual tires that touch and under-inflated tires

loose fuel connections or under-inflated tires

poor cargo ventilation or short circuits

improperly loaded cargo and dual tires that touch

17 / 40

For emergency braking to avoid a crash when driving a double trailer you should:

do stab or controlled braking

slam down the brake pedal and keep pressure on it

use the trailer brakes only

none of the answers listed

18 / 40

Which of the following types of cargo can never be carrier on a bus with riders?

Emergency tear gas.

Emergency drug shipments.

Emergency hospital supplies.

Small arms ammunition (orm-d).

19 / 40

The baffles in a tank trailer help to control:

The movement of liquid from front to back.

The overall weight of the vehicle.

The flow of liquid side to side.

The distrubition of weight.

20 / 40

Hazardous materials (that are not forbidden) carried on a bus must be:

Stored in the passenger compartment

Labeled

Carried in a metal box

All of these answers are correct

21 / 40

Select the statement that is not part of the air-brake system:

emergency brake system

service brake system

parking brake system

clutch brake system

22 / 40

How do you secure a second trailer to your combination vehicle?

use wheel chocks only

use the emergency air brakes or the trailer's spring brakes only

use emergency air brakes, spring brakes, and wheel chocks together

none of the answers listed

23 / 40

As the driver of a bus, how can you best avoid hindering other traffic on the highway?

By passing only the slowest vehicles.

By staying in the right lane if you can.

By driving faster than the other traffic.

By never passing.

24 / 40

If a rider wants to bring a car battery or a can of gasoline or kerosene aboard your bus, you should:

Not allow the rider to do it.

Put the materials in the bus's "safe box".

Instruct the rider to sit next to an open window.

Have the rider pay a second fare.

25 / 40

How can you determine if your vehicle is equipped with ABS?

check if your vehicle was manufactured after March 1, 1998 (they are required to have the panel light)

look for wheel speed sensor wires that are coming from the rear of your brakes

check for yellow abs malfunction lamps on the instrument panel

all of these answers are correct

26 / 40

Is this statement true or false: You do not need to use the parking brake if are leaving your vehicle for a short amount of time.

true

only when the vehicle has over 60,000 miles on it

false

only when the vehicle has over 25,000 miles on it

27 / 40

A portable tank differs from a cargo tank in that ______.

portable tanks are bulk containers, which are not permanently attached to a vehicle

portable tanks are bulk containers, which are permanently attached to a vehicle

cargo tanks are bulk containers, which are not permanently attached to a vehicle

none of these answers are correct

28 / 40

Select the statement that best describes what the trailer air supply control does:

when pushed in it supplies the tractor with air and when pulled out it supplies the trailer with air

when pushed it it supplies the trailer with air and when pulled out it supplies the tractor with air

when pulled out it supplies the trailer with air and when pushed in it shuts off the air and puts on the trailer emergency brakes

when pushed in it supplies the trailer with air and when you pull it out it shuts off the air supply and puts on the trailer emergency brakes

29 / 40

When should you check your mirrors for a lane change?

All of these answers are correct.

After completing the lane change.

Right after starting the lane change.

Before and after signaling the change.

30 / 40

At 55 miles-per-hour it takes about 6 seconds to stop a fully loaded truck and the braking distance is:

about the length of a football field or 100 yards

about two truck lengths

about two car lengths

about 1/4 mile

31 / 40

When there is a hazardous materials emergency. You should:

All of these answers are correct.

Prevent smoking and keep open flames away.

Keep people away and warn them of the danger.

Contact emergency authorities.

32 / 40

Which two special conditions indicate that you should downshift?

starting down a hill and entering a curve

starting up a hill and entering a curve

starting down a hill and finishing a curve

starting up a hill and finishing a curve

33 / 40

To test the tractor-trailer connection for security, you should:

drive forward in a high gear with the trailer brakes on and check it

drive forward with a sharp jerk

drive forward in a low gear with the trailer brakes locked and then look at it carefully

rock the trailer side to side with the trailer brakes on

34 / 40

You should keep a minimum of ____between another vehicle and the double trailer with 100 ft truck driving at 30 mph.

13 seconds

10 seconds

15 seconds

8 seconds

35 / 40

Check that the parking brake will hold by____when the parking brake is engaged and the trailer brakes released if not a combination vehicle.

while in neutral increase the rpm to 1500

shifting down to a low gear and trying to pull forward gently

shift up into a high gear and let off the clutch quickly

all answers listed

36 / 40

The 3 parts of the air brake system are: service brakes, parking brakes, and ____.

foot brakes

v-cam brakes

disc brakes

bolt brakes

37 / 40

The trailer height is correct for connecting a converter dolly to a second or third trailer when:

the trailer will rise slightly when the converter dolly is backed underneath it

the center of the kingpin is past the locking jaw

the kingpin is over the fifth wheel

all answers listed

38 / 40

Select the true statement in regards to the center of gravity for tanks:

The vehicle can handle higher speeds around curves than other large trucks.

The vehicle can turn over even when driving at the posted speed limit for curves.

The center of gravity is generally lower than with other large trucks.

None of the answers listed.

39 / 40

Why does it take special skills to haul a tank vehicle?

It is top heavy.

There is a high center of gravity.

The weight of the load is high up off the road.

All of the answers listed.

40 / 40

Select the answer that is controlled by the foot brake.

the shut off valves

the engine brake

the service air line

the emergency brake

Your score is

The average score is 0%

5/5 - (3 votes)

CDL Category Practice Tests

CDL Practice Test

How To Get A louisiana Commercial Drivers License

Applicants looking to obtain their CDL for interstate driving and any Hazardous Materials Endorsement must be 21 years of age or older. Those who are 18 years of age, but under the age of 21 may apply for an intrastate CDL. These individuals are not able to operate doubles, triples, loaded buses, or HazMat vehicles. All applicants must have a completed Form DPSMV2219 from their medical examiner to apply for their CDL.

There are certain situations in which an individual will automatically be disqualified from receiving their CDL. These are listed below.

Having CDL privileges in another state disqualified.
Being convicted of driving impaired in a commercial vehicles 24 months prior to the application.
Having more than one driver’s license.
Having a denied, canceled, revoked, or suspended driver’s license.

All commercial driver’s license applicants must pass a practical skills CDL test and one or more knowledge tests.

Endorsements
T – Double/Triple Trailers
P – Passenger
N – Tank Vehicles
H – Hazardous Materials
X – Combination Tank Vehicles and Hazardous Materials
M – Motorcycle
S – School Bus

Hit the Open Road

louisiana CDL License Test Tips

Each applicant will be required to successfully pass one or more knowledge tests in order to move onto the practical skills test to receive their CDL. A passing score must be received for each test taken and is considered at 80 percent or higher. General knowledge tests are 50 to 70 questions in length and are required when applying for any Louisiana Class CDL. Those looking to have endorsements on their CDL will need to pass one additional knowledge test per endorsement.

Each applicant, regardless of Class, is required to pass a three-part practical skills test. This includes a pre-trip vehicle inspection, basic control skills, and an on-road driving test. This test ensures that the applicant is able to inspect a vehicle for safety, operate the vehicle, and can handle the vehicle with different road situations.

Additional Information

Information on the Louisiana Office of Motor Vehicles (OMV)

The Louisiana Office of Motor Vehicles Public Safety Services regulates CDL requirements in Louisiana. To get more information contact them via:

Website: http://dpsweb.dps.louisiana.gov/

Phone: 888.214.5367

Additional Louisiana CDL Helpful Links

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

louisiana CDL Practice Test