texas
CDL Practice Test

As you prepare to obtain your CDL in Texas, you can use this site as a guide for practicing common test questions. Rules and regulations covered on these practice tests for a CDL are based on questions from the Texas TxDPS CDL manual. You can take these practice tests as often as you like on your computer or mobile device, and all the tests on this site are 100% free. 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

Which of the following types of cargo must never be carried on a bus with passengers?

Tear gas

Emergency hospital supplies

Emergency drug shipments

Small arms ammunition (orm-d)

2 / 40

What is NOT one of the four skill areas that operating a commercial vehicle requires?

steering

accelerating

safely backing

first aid certification

3 / 40

You need to be extra careful when driving smooth bore tanks:

When hauling food or milk products.

When unloading or loading.

When stopping or starting.

All answers listed.

4 / 40

How should the hand valve be used?

only when accompanied by the service brakes

to test the trailer brakes

only when the trailer is loaded to its maximum weight

only when accompanied by the foot brake

5 / 40

What action should you take if there is no phone available and you discover your hazardous materials shipment leaking at a rest stop?

Send someone for help with all the necessary information.

Keep driving for help as quickly as possible.

Keep driving, slowly and cautiously, until you reach a phone.

Leave your truck parked with emergency lights on and walk for help.

6 / 40

How do you know when your brakes are fading?

to control your speed on a downgrade you have to push harder on the brake pedal

your speed increases when pressure is removed from the brake pedal

the brake pedal flops to the cabin floor

to control your speed on a downgrade you have to apply less pressure to the break pedal

7 / 40

Remember to_____to prevent rollovers.

have the load centered

have the load as low to the ground as possible

all answers listed

drive slowly around turns

8 / 40

If you are already carrying 100 pounds of silver cyanide, what precautions must you take if you are given papers at a dock to carry 100 cartons of battery acid?

Make sure there is plenty of space between the two.

Inform someone and not load the battery acid.

Make sure the battery acid is loaded on top of the silver cyanide.

Make sure the silver cyanide is loaded on top of the battery acid.

9 / 40

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

check for yellow abs malfunction lamps on the instrument panel

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

all of these answers are correct

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

10 / 40

What is the benefit of ABS?

it decreases your stopping distance

it provides an added layer of safety for truck drivers

all of these answers are correct

it prevents the wheels from locking up during heavy braking or slippery conditions

11 / 40

Which trailer is more likely to roll over when pulling 3 trailers?

the first trailer

the last trailer

the second trailer

the tractor

12 / 40

The average person requires how many hours of sleep per 24 hour period?

7 or 8

8 or 9

6 or 7

5 or 6

13 / 40

This gauge will indicate if the generator or alternator is charging:

Coolant

Oil pressure

Voltmeter/ammeter

Gas tank

14 / 40

What is the most important reason for doing a school bus inspection?

To check for flat tires.

For safety required by federal, state, and local laws.

To assist the school principal with their report.

To give the mechanic something to do.

15 / 40

You should follow the posted speed limits for curves and be aware of:

A rollover may occur even when driving at the posted speed limit.

The posted speed limit may be too high for safety.

All answers listed.

The higher center of gravity on a tank truck.

16 / 40

It is very important that you never smoke around which hazard classes?

It is ok to smoke anywhere.

Corrosive, radioactive, dangerous, slippery when wet, inhalation.

All hazard classes.

Explosives, flammable gas, oxidizers, flammable solids, flammable liquids.

17 / 40

Select the statement that tells you how you can check the low pressure warning signal.

Turn the electrical power off and apply pressure on and off the brake pedal to decrease air tank pressure. The low air pressure warning signal must come on before the pressure drops to less than 30 psi in the air tank.

Turn the electrical power on and apply pressure on and off the brake pedal to decrease the air tank pressure. The low air pressure warning signal must come on before the pressure drops to less than 60 psi in the air tank.

The low pressure warning signal is only testable by the factory.

Turn the electrical power on and apply pressure on and off the brake pedal to increase air tank pressure. The low air pressure warning signal must come on before the pressure increases to more than 60 psi in the air tank.

18 / 40

Overhead inside mirror is used to:

Monitor traffic that approaches and enters the blind spot area.

See all of the students.

See the blind spot immediately behind the bus.

See the area where students exit the bus.

19 / 40

Select the true statement in regards to brake drums:

Hold the brake linings and shoes.

They are bolted to the wheels.

They are located at both ends of the axles of the vehicle.

All of these answers are correct.

20 / 40

If you do become sleepy while driving, you should _____.

drink caffeinated beverages

stop to sleep

roll down the windows

turn up the radio

21 / 40

Do not tow or push a disabled bus with riders aboard the vehicle, unless:

Your employer tells you to.

You are also a class a tow truck driver.

Getting off the bus would be unsafe.

Bus is on a drawbridge.

22 / 40

How often should you check the tires on a placarded trailer that has dual tires?

Each time you stop.

Once every 100 miles.

Once every three hours.

Start of each day and every time you stop.

23 / 40

How do you test your service brakes?

release the air pressure and activate the parking brake

apply pressure to the brake pedal when moving at highway speeds

after releasing the parking brake, move forward slowly and apply pressure to the brake pedal

pull over and activate the parking brake

24 / 40

A truck with baffles will handle:

The same as a tanker with no baffles.

Heavier that it actually is.

None of the answers listed.

With less front to back surge compared to trailers without baffles.

25 / 40

You should line up_____when getting ready to back under the trailer.

for the kingpin to activate on the driver's side first

directly in front of the trailer

above 12 degrees to the right of the trailer

about 12 degrees to the left of the trailer

26 / 40

Which hazard classes must you NEVER smoke, or perform any activity involving fire, within 25 feet of?

Class 4 only

Class 2 only

Class 1 only

Classes 1, 2, 3, and 4

27 / 40

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

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

have a random pedestrian direct your path of travel

double check to make sure the trailer brakes are off

28 / 40

What will occur as a result of failing to perform all 3 components of the air brake check?

None of the answers listed.

An automatic failure of the vehicle inspection test.

The driver must restart the pre-trip from the beginning.

A deduction of 15 points.

29 / 40

The best way to test if the spring brakes come on automatically is to:

apply pressure on and off the brake pedal until the parkng brake valve pops out on tractor-trailer vehicles

all of these answers are correct

apply pressure on and off the brake pedal until the parking valve pops out on single vehicles

apply pressure on and off the brake pedal until the manufacturer's low psi specification has been met for the spring brakes to deploy

30 / 40

When fueling a placarded vehicle, someone must always be:

At the emergency power shut off for the pump.

At the nozzle, controlling the fuel flow.

Within 10 feet of the pump with a fire extinguisher.

Be at the rear most corner on the vehicle.

31 / 40

Select the true statement in regards to if a glad hand on the blue air line is missing a seal.

you should remove one from the red air line to use as a temporary replacement

there may be a service line air leak

it is not a big problem

there may be an emergency line air leak

32 / 40

When arriving at the destination announce:

The reason for stopping.

The next departure time.

The location.

All of these answers are correct.

33 / 40

In the event of an accident you should remember to do the following EXCEPT:

notify authorities

protect the area

move the victims out of the way immediately

stop any bleeding and keep the victims warm

34 / 40

Select the true statement about baffled tankers:

None of the answers listed.

It has hollow balls in it to slow the motion of the liquid in the trailer.

It has separate tanks.

It has walls with holes inside for liquid to flow through.

35 / 40

You should activate hazard lights within approximately how many feet before railroad crossing?

250 feet

300 feet

200 feet

400 feet

36 / 40

Which of the following hazard classes utilizes a transport index in order to determine how much of it can be loaded on a single vehicle for transport?

Class 4—live chickens

Class 1—explosives

Class 3—flammable liquids

Class 7—radioactive materials

37 / 40

If you are traveling at 55 mph in a 30-foot vehicle, you should leave how many seconds of following distance?

6 seconds

7 seconds

3 seconds

4 seconds

38 / 40

Which contains more alcohol: a 12-ounce glass of 5% beer, a 5-ounce glass of 12% wine or a 1 1/2-ounce shot of 80 proof liquor?

1 1/2-ounce shot of 80 proof liquor

12-ounce glass of 5% beer

5-ounce glass of 12% wine

they all contain the same amount of alcohol

39 / 40

When driving tank vehicles you should:

Decrease your speed before entering a curve and then accelerate through it.

Maintain the posted speed limit as you enter the curve.

None of the answers listed.

Come to a stop before entering a curve and then accelerate through it.

40 / 40

What is the purpose of a driver placarding his or her vehicle?

Warning those with children to drive in another lane.

Giving people something interesting to look at while driving.

Forcing other drivers to stay 20 feet away in every direction.

Communicating risk.

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The average score is 0%

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CDL Category Practice Tests

CDL Practice Test

How To Get A texas Commercial Drivers License

To be eligible for a CDL in Texas, applicants must meet the following age eligibility requirements.

Be at least 18 years old to operate a commercial vehicle intrastate (within Texas only).
Be at least 21 years old to operate a commercial vehicle interstate (outside of Texas).

Texas CDL applicants must be medically certified that they are fit enough to operate a commercial vehicle and pass a vision test. Applicants are required to submit the following documents.

(Form CDL-4) Interstate Driver Certification
(Form CDL-5) Intrastate Driver Certification
(Form CDL-10) Certificate of Physical Exemption 49 CFR Part 391/390

Some applicants may be required to submit a Medical Examiner’s Certificate. Drivers who have had their licenses revoked, suspended, denied or canceled are not eligible for a CDL in Texas. Applicants can be disqualified for having multiple licenses.

Texas CDL Endorsements

H – Hazmat Vehicles
N – Tank Vehicles
P – Passenger Vehicles
S – School Bus
T – Double or Triple Trailer
X – Combination Tank Vehicles and Hazmat Vehicles

Hit the Open Road

texas CDL License Test Tips

All Texas CDL applicants must pass the general knowledge test prior to taking the skills test. This test consists of 50 questions. To pass the Texas CDL test, applicants must score 80 percent or higher. Applicants who require additional endorsements must pass additional tests and pay the required fees. The Texas skills test can be taken 14 days after applicants pass the knowledge test. It includes a pre-trip vehicle inspection, basic control skills and on-road driving. Applicants must pass each section.

Military veterans and current military members can apply to have the skills exam waived if they meet the requirements. To qualify for a waiver, applicants must be currently enlisted in the military and:

Possess a valid Texas driver’s license.
Have at least 2 years of military truck driving experience. The military vehicle must be similar to the commercial motor vehicle.
Have been honorably discharged from the military within the past 12 months.
Submit (Form CDL-ST WVR) Application for Military Skills Test Waiver signed by your commanding officer.

Additional Information

Information on the Texas Department of Public Safety

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

Website: http://www.dps.texas.gov/DriverLicense/CommercialLicense.htm

Phone: 512.424.2000

Additional Texas CDL Helpful Links

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

texas CDL Practice Test

CDL Category Practice Tests

CDL Practice Test

How To Get A texas Commercial Drivers License

Hit the Open Road

texas CDL License Test Tips

Additional Information

Information on the Texas Department of Public Safety

Additional Texas CDL Helpful Links

texas
CDL Practice Test