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

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

rock the trailer side to side with the trailer brakes on

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

2 / 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.

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

true

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

false

3 / 40

What is always required before loading, driving, or unloading a tanker?

An inspection

Registration of driving plan

Shift into park

Clean the vehicle

4 / 40

Why is it dangerous to unlock the pintle hook with the dolly still under the rear trailer?

the fifth wheel may be misaligned

the kingpin may snap in half

the spring brakes may release

the dolly tow bar may fly up

5 / 40

Operating a motor vehicle with the intent of doing harm to others or physically assaulting a driver or their vehicle is known as?

road rage

tailgating

defensive driving

aggressive driving

6 / 40

The air leakage rate for a combination vehicle should not exceed ____psi a minute.

7 / 40

What are spring brakes?

they are large springs that are held closed by air pressure if the air pressure is increased the brakes are applied

they are powerful springs that are restrained by air pressure when the air pressure is removed, the brakes are applied

none of the answers listed

they are big springs with air pressure in them if the air pressure decreases, the brakes are applied

8 / 40

What might happen if a trailer is too high when you try to couple?

the queen pin may fall off

all answers listed

it may not correctly couple

the trailer may tip to the side

9 / 40

A hazard class that uses transport indexes to determine the amount that can be loaded in a single vehicle is _____.

Class 3 flammable liquids

Class 1 explosives

Class 6 poisons

Class 7 radioactive materials

10 / 40

The Emergency Response Guide, ERG, can best be explained as _____.

a guidebook for firefighters, police, industry workers, truck drivers, dock workers, and shippers on how to protect themselves and the public from hazardous materials

none of these answers are correct

a guide explaining what materials can be hauled together in the same vehicle and a guidebook for firefighters, police, and industry workers on how to protect themselves and the public from hazardous materials

a guide explaining what materials can be hauled together in the same vehicle

11 / 40

How should the shut off valves at the rear of the trailer be when inspecting doubles?

none of the answers listed

closed at the rear of the last trailer and front trailer

open at the rear of the last trailer and front trailer

closed at the rear of the last trailer and open at the rear of the front trailer

12 / 40

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

Emergency hospital supplies.

Emergency drug shipments.

Small arms ammunition (orm-d).

Emergency tear gas.

13 / 40

How many different hazard classes are there?

14 / 40

When would you lock some emergency roof hatches in a partly open position?

For fresh air

First day of spring

Never

Whenever you enter a tunnel

15 / 40

What are you checking when looking at the lubrication level on a dipstick?

The horn fluid level

The windshield wiper fluid level

The power steering fluid level

The oil level

16 / 40

Select the true statement in regards to a converter dolly:

none of the answers listed

it is a coupling device with only two axles and a sixth wheel to which a semitrailer can be coupled to the rear of a tractor-trailer combination forming a double bottom rig

it is a connecting device consisting of one axle which disconnects a semitrailer combination vehicle converting it into two separate trailers

it is a coupling device with one or two axles and a fifth wheel with which a semitrailer can be coupled to the rear of a tractor-trailer combination forming a double bottom rig

17 / 40

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

When stopping or starting.

When hauling food or milk products.

When unloading or loading.

All answers listed.

18 / 40

You should never brake and should rely only steering inputs to avoid a crash while driving a tanker truck.

True

True, but only in ideal conditions

False

True, but only on downgrades

19 / 40

The driver's manual advises you to disconnect the steering axle brake to keep the rig straight:

whever you feel like it

when it is raining

in ideal conditions

never

20 / 40

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

the kingpin is resting behind the fifth wheel

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

the top of the kingpin lines up with the locking jaws

the trailer will slightly lower when the converter dolly backed under it

21 / 40

Some hazardous materials may not be loaded together with other hazardous materials. The prohibited combinations are listed in the:

Hazardous materials table.

Segregation and separation chart.

Hazardous waste manifest.

List of hazardous materials and reportable quantities.

22 / 40

A disruptive passenger:

Should not be discharged where it would be unsafe for them.

Should not be allowed on the bus.

May be thrown off the bus.

Is not your responsibility.

23 / 40

Which of the following would NOT be part of a standard vehicle inspection?

steering system defects

seating defects

bad brake drums or shoes

tire problems

24 / 40

Select the true statement about slack adjusters:

they can be adjusted automatically or manually

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

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

they do not ever need to be adjusted

25 / 40

Mirrors with a convex surface or "spot" mirrors _____.

make things look closer and larger than they actually are

they show a larger area than flat mirrors so do not need to be checked as often

make things look farther away and smaller than they actually are

are illegal in most states

26 / 40

In the slide mechanism of the sliding fifth wheel, this object should have no missing pins or be loose when fully engaged.

Rock jaw

Locking pins

Kingpin

Pintle hook

27 / 40

You need to raise the landing gear just to the height of where it clears the pavement before driving.

only in ideal conditions

true

only in raining conditions

false

28 / 40

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

Class 2 only

Classes 1, 2, 3, and 4

Class 4 only

Class 1 only

29 / 40

Which of the following is NOT something you need to know in order to determine if you need to use placards?

The manufacturing date for the materials.

The amount of all hazardous materials of all classes in your vehicle.

The substance or material's hazard class.

The amount of a substance or material being shipped.

30 / 40

What is the best way to stop all skids?

restore traction back to the tires

accelerate and countersteer

quickly turn the steering wheel side to side

use controlled or stab braking

31 / 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 engine brake to kick on

the emergency line valve to release air

air leaving the open valve

32 / 40

Select the reason as to why air tanks need to be drained:

to release water and other contaminents which may cause brakes to fail in freezing weather

to prevent the left sided brake from locking up

to provide greater control of your vehicle

tanks usually do not need to be drained

33 / 40

Which of the following statements about bus evacuation is true?

If time allows, notify the dispatcher about evacuation location, conditions, and type of assistance needed.

If time allows, backup to the stop before evacuating the bus.

If time allows, walk through the bus and close all windows.

If time allows, notify the police.

34 / 40

All standing riders must stay:

Forward of the rear of the driver's seat.

Behind the standee line.

Within two feet of an emergency exit.

In front of the standee line.

35 / 40

How do you check the coolant level?

Inspect the reservoir sight glass or remove the radiator cap if the engine isn't hot.

Remove the radiator cap once it is at operating temperature.

None of the answers listed.

While wearing rubber gloves and safety glasses.

36 / 40

____is the most common type of foundation brakes used by heavy vehicles.

None of the answers listed

Rectangle brakes

S-Cam drum

Wedge drum

37 / 40

How far before a railroad crossing should you stop your bus?

15 to 50 feet

10 to 35 feet

100 feet exactly

50 to 75 feet

38 / 40

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

a result of following behind too closely

a result of changing lanes too frequently

a result of excessive speed

a result of rollover

39 / 40

Cylinders containing compressed gases may only be loaded onto a vehicle without a flat floor or platform if the cylinders are:

In boxes that will keep them from turning over.

Loaded in an upright or horizontal position.

Loaded into racks attached to the vehicle.

All of these answers are correct.

40 / 40

The walls that separate compartments inside the tanks and having openings at the top and bottom are called:

Bulktears

Layers

Baffles

Free walls

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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