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

You don't want to use wheel chocks when hooking a combination to a second trailer with no spring brakes. What should you do?

use a portable generator to supply brake pressure

supply air to the trailer air system via the tractor and then disconnect the emergency line

make sure the trailer will not roll away when coupling

none of the answers listed

2 / 40

If there is rust around the nuts, what may it indicate?

They are fitted just right.

There is a leak somewhere.

They are loose.

They need to be changed out.

3 / 40

This item should be firmly attached the to frame, be solid, and clear of objects:

The locking jaw

None of these answers are correct answers are correct

The catwalk

The lock pins

4 / 40

What are the three hazard classes should NOT be loaded into a trailer that has a heater air conditioner unit?

None of these answers are correct.

Class 1 explosives, class 3 flammable liquids, and division 21 flammable gas.

Class 2 explosives, class 3 flammable solids, and division 21 inhalation hazard.

Class 1 explosives, class 8 corrosives, and division 5 oxidizers.

5 / 40

When backing, what is the best method to use to avoid blind spots?

look at your path

back towards the driver's side, where you can see better

use a helper

use mirrors on both sides

6 / 40

Why do air brakes take longer to stop than hydraulic brakes?

none of the answers listed

it takes more time for the air to flow through the lines

longer reaction time

the lines are hotter

7 / 40

When there is a hazardous materials emergency. You should:

Prevent smoking and keep open flames away.

All of these answers are correct.

Keep people away and warn them of the danger.

Contact emergency authorities.

8 / 40

What is most likely to occur when the front wheels begin to skid?

You will continue heading in a straight line and moving forward no matter what direction you turn the steering wheel.

The power of the surge will disconnect the tank from the truck.

A roll over will occur.

All answers listed.

9 / 40

What gauge on the dashboard indicates electrical system charging rate?

The power gauge

The ammeter/voltmeter

The air gauge

The coolant pressure gauge

10 / 40

A safe haven is:

A place where it is safe to dump any kind of hazardous materials.

The slang term for the last stop at the end of your driving day when carrying hazardous materials.

A place to stay once you have reported your company for illegal activity.

A place that has been approved to park unattended vehicles carrying explosives.

11 / 40

How many different hazard classes are there?

12 / 40

Select the statement that describes smooth bore tanks:

None of the answers listed.

They are 1 large tank.

They are divided with holes from liquid to flow through controlling surge.

They are divided down into smaller tanks.

13 / 40

What action should you take before driving while drowsy?

drink energy drinks

pull off the road and get some sleep

drink a cup of coffee

open your vehicle windows for some fresh air

14 / 40

Select the true statement about double or triple trailers.

they can have a dangerous "crack the whip" effect

they present a rearward amplification hazard

they can roll over due to abrupt steering movements

all answers listed

15 / 40

Where should the safety catch for the fifth wheel locking lever be located for coupling to be complete?

through the locking lever

above the locking lever

below the locking lever

outside of the locking lever

16 / 40

Select the true statement in regards to brake drums:

All of these answers are correct.

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

They are bolted to the wheels.

Hold the brake linings and shoes.

17 / 40

What does outage mean?

It is the allowance needed for the expansion of liquid.

It is how quickly the tanks drain.

It is the weight of the liquid.

It is the movement of the liquid.

18 / 40

If your bus has an emergency exit door, it must:

All of these answers are correct.

Be closed when operating the bus.

Have a red electric door light turned on at all times.

Not have any signs, stickers, or markings anywhere near it.

19 / 40

What are shippers trying to accomplish when they package the material?

Make it easy to identify.

Make it easy to open and close.

All of these answers are correct.

Make it as light as possible.

20 / 40

The best way to describe a dual air brake system is:

all of these answers are correct

there are 2 separate air brake systems that supply air to the trailer if there is one

there are 2 separate air brake systems that have their own hoses, lines etc

there is a primary and secondary system that is 2 separate air brake systems

21 / 40

Before backing under the trailer you should______when coupling a tractor and trailer with air lines already connected.

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

press down on the brake pedal twice

have the trailer brakes off

all answers listed

22 / 40

Which of the following statements is FALSE?

if a tire blows, you should put the brakes on hard to stop quickly

you can almost always turn to miss an obstacle more quickly than you can stop

stopping is not always the safest thing to do in an emergency

anti-lock braking systems (ABS) only activate when wheels are about to lock

23 / 40

When should you not use the parking brakes?

while in hot weather

when air pressure is low

while on a steep hill

when the brakes are hot

24 / 40

Double and triple trailers should be driven with care to avoid a rollover or jacknife.

false

only in ideal conditions

only on downgrades

true

25 / 40

Select what you should not do when coupling the glad hands.

make sure to match the colors or check the tags before connecting

cross the air supply lines to test for leaks

clean the couplers before connecting them

press the seals together at a 90 degree angle

26 / 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 spring brakes may release

the kingpin may snap in half

the dolly tow bar may fly up

27 / 40

If you have riders on board, you must never refuel:

With any window open.

Unless on a scenic tour bus.

In a closed building.

At any time.

28 / 40

The bus driver must accept responsibility for supervising and controlling students while on the bus route. Who is the person in charge?

Parents of the students on the bus.

The school district superintendent.

Students on the bus.

Bus driver.

29 / 40

The front trailer supports should be____before driving away.

3 turns down from the top and the crank handle secured in its bracket

raised 1/3 of the way with the crank handle secured in its bracket

raised 1/2 way with the crank handle secured in its bracket

raised fully and the crank handle secured in its bracket

30 / 40

What is the service air line controlled by?

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

all answers listed

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

31 / 40

For emergency braking when driving a double trailer and having to use your brakes to avoid a collision is to:

use stab or controlled braking

use just the trailer brakes

apply a firm pressure to the brake pedal and don’t let off

use the engine brake

32 / 40

What handling effect will baffles have?

There will be less side to side surging.

There will be less of surging front to back.

There will be an increase in slow surge.

None of the answers listed.

33 / 40

You should place the starter switch key into your pocket while you are performing the pre-trip inspection because:

it could damage the starting mechanism

someone could steal the truck

someone could start and move the truck

all of these answers are correct

34 / 40

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

True, but only in ideal conditions

False

True

True, but only on downgrades

35 / 40

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

the last trailer

the first trailer

the tractor

the second trailer

36 / 40

This item should not be rusted, bent, or damaged and centered over evenly spaced tires and dual wheels.

Lug bolts

Frame

Spacers

Fifth wheel

37 / 40

The trailer should be lowered so that _____.

you are able to use the landing gear to make adjustments

the tractor comes in contact with the nose of the trailer

the trailer is high above the fifth wheel

it is slightly raised when the tractor is backed under it

38 / 40

Some city transit buses may have a brake-door interlock system, this system:

Should be used in emergencies.

Should be used in place of the parking brake.

Works when the rear door is open.

Releases the brakes.

39 / 40

At what pressure is the safety valve in the air compressor tank set to open?

150 psi

100 psi

125 psi

225 psi

40 / 40

You should adjust all the outside left and right side convex mirrors to see:

The right and left front tires touching the ground.

200 feet behind the bus.

The entire area to the rear of the mirror along the side of the bus.

The children's exit path out of the main bus door.

Your score is

The average score is 0%

4/5 - (2 votes)

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