colorado
CDL Practice Test

Welcome to the Colorado CDL practice test site. Topics covered in these practice tests are designed to prepare you for the Colorado Department of Motor Vehicles CDL test. These tests are free and you are able to take tests as many times as you would like as you prepare to obtain your Colorado 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

What does the amount of liquid allowed in the tank depend on?

All answers listed.

The size of the tank.

Whether and how much the liquid will expand during the trip.

The legally allowed weight limits.

2 / 40

What are slack adjusters?

they are between the S-Cam on drum brakes and the push rod

they are a part of the air brake system that adjusts the brakes

all of these answers are correct

they are between the push rod on disc brakes and power screw

3 / 40

Select the definition for outage:

It is loss of power to the headlights.

It is the process of liquid expansion as it becomes warm.

It is how much power is lost to the hydraulics.

It is the liquid that must be drained off to meet legal carry limit.

4 / 40

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

one

seven

three

five

5 / 40

The safety catch for the fifth wheel locking lever must be ____ for a coupling to be complete.

below the locking lever

above the locking lever

sticking straight up

threaded through the locking lever

6 / 40

A commercial motor vehicle (CMV) is defined as:

a vehicle with a gross weight over 26,001 lbs

a vehicle transporting 16 or more passengers

a vehicle transporting hazardous materials

all of these answers are correct

7 / 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?

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.

Make sure there is plenty of space between the two.

8 / 40

You should have the fifth wheel plate greased as recommened because:

it will ensure a good electrical connection

it will prevent steering problems

it will reduce noise and heat

it will ensure a good air line connection

9 / 40

What do you need to do to supply air to the air tanks of the second trailer?

close the shut off valves at the back of each trailer

open the shut off valve at the back of both trailers

none of the answers listed

open up the shutt off valves on the rear of the first trailer and close the shut off valve at the back of the second trailer

10 / 40

Which of the following statements is FALSE:

Do not tow or push a disabled bus with riders aboard either vehicle, unless getting off the bus would be unsafe.

Do not transport intoxicated passengers.

Do not talk with riders or engage in any other distracting activity while driving.

Avoid fueling your bus with riders on board unless absolutely necessary. never refuel in a closed building with riders on board.

11 / 40

What action should you take before driving while drowsy?

drink energy drinks

open your vehicle windows for some fresh air

pull off the road and get some sleep

drink a cup of coffee

12 / 40

What are the three types of emergency equipment that you must have with your vehicle?

first aid kit, fire extinguisher, flares

warning devices for parked vehicles, first aid kit, flares

fire extinguisher, spare electrical fuses, warning devices for parked vehicles

none of these answers are correct

13 / 40

For any flatbed load you must have at least ____ tie downs.

four

six

one

two

14 / 40

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

bad brake drums or shoes

steering system defects

seating defects

tire problems

15 / 40

What handling effect should you expect when your tank has baffles?

There will not be as much front to back surge compared to a tank without baffles.

There will not be as much side to side surge compared to a tank without baffles.

The surge will be slower than a tank without baffles.

There is no difference in handling when you have baffles.

16 / 40

Be careful to check the_____when unloading the smaller tanks of bulk heads.

percentage of alcohol

the fuel to air ratio

percentage of water

weight distribution

17 / 40

Class A explosives must not be transported in a combination vehicle if the vehicle includes:

Two or more trailers.

A placarded cargo tank.

None of these answers are correct.

A 200 inch wheelbase trailer.

18 / 40

Where can you find a shipper’s certification?

There is no such thing.

It is a separate document that all hazmat drivers must keep in their vehicles.

On the original shipping paper.

On all packages.

19 / 40

In Column 1 the symbol "I" means:

International restrictions.

Invalid substance.

Iodine.

International transportation.

20 / 40

The object that doesn't get checked at the side of the trailer is the:

The frame

Electrical/air connections

The landing gear

The locking pins/tandem release arm

21 / 40

Select the true statement in regards to your brake function when your ABS fails

there is a huge fire risk

you will have no control over your truck as the brakes will not be functioning

the abs will need to be repaired but the brakes will function normally

you will need to pull over immediately

22 / 40

When fueling a placarded vehicle, someone must always be:

Within 10 feet of the pump with a fire extinguisher.

Be at the rear most corner on the vehicle.

At the emergency power shut off for the pump.

At the nozzle, controlling the fuel flow.

23 / 40

Check to ensure that____when inspecting the coupling.

there is no slack at all in the air lines

the landing gear handle is free to hang down

there is minimal slack in the air lines

the electrical cable is unplugged

24 / 40

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

all answers listed

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

25 / 40

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

make things look farther away and smaller than they actually are

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

make things look closer and larger than they actually are

are illegal in most states

26 / 40

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

the kingpin is over the fifth wheel

the center of the kingpin is past the locking jaw

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

all answers listed

27 / 40

How should the hand valve be used?

only in conjuction with the foot brake

when the trailer is fully loaded down

to test the trailer brakes

only in emergency situations

28 / 40

What is the normal operating range for a truck's oil pressure?

30-75 psi

20-30 psi

40-60 psi

This is engine-specific

29 / 40

You should____when an emergency requires you to quickly stop due to a crash.

use only the engine brakes

use the hand valve

use stab or controlled braking

maintain pressure on the brake pedal

30 / 40

What is the earliest way to notice a trailer skid?

you can hear the tires squealing

you can see it in your mirrors

you can feel it pulling your steering wheel

you can feel a jerk in the back of the tractor

31 / 40

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

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

It is ok to smoke anywhere.

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

All hazard classes.

32 / 40

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

Segregation and separation chart.

List of hazardous materials and reportable quantities.

Hazardous waste manifest.

Hazardous materials table.

33 / 40

Overhead inside mirror is used to:

see the blind spot immediately behind the bus

see the area where students exit the bus

monitor traffic that approaches and enters the blind spot area

see all of the students

34 / 40

Which of the following will confirm that you are driving with anti-lock brakes?

Yellow abs malfunction lamp on the instrument panel will light when you start the engine.

The certification on the driver side door.

The bus operators manual.

Red indicator lamp on the brake cylinder.

35 / 40

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

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

Stop, look, and listen.

None of these answers are correct.

Stop, go, and stop.

36 / 40

Why is understanding the loading and unloading procedures so critical?

Because many students are killed while getting on and off a school bus each year.

Because school district officials have the authority to conduct surprise quizzes and you must know the correct answers to keep your job.

Because motorists ignore students walking to school.

Because only high school students understand how to cross the road.

37 / 40

What does it mean when the safety valve releases air?

all of these answers are correct

you need it to have it checked out by a mechanic because something is wrong

pressure has passed 150 psi

there is too much air in the air compressor

38 / 40

When would a drive-wheel skid result in a jackknife when pulling doubles?

when the tractor spins around

when the trailer slides to the right into the shoulder

when the tractor brakes lock up

when the trailer pushes the towed vehicle sideways

39 / 40

Select the true statement in regards to when a bulk tank vehicle stops at an intersection on a slippery surface:

The trailer may slide to the side due to the rocking motion.

The trailer may slide into the oncoming traffic.

The liquid may leak out of the tank.

The movement of the liquid may push the truck into the intersection.

40 / 40

A battery box check is important. The battery must be secure, connection must be tight, and cell caps must be present. In addition these items should be checked:

The fluid level inside the battery.

Battery connections should not show signs of excessive corrosion, and the battery box and cover or door should not be damaged and should be secure.

Battery connections should not show signs of excessive corrosion, but the battery box and cover or door is unimportant.

Battery connection should show signs of excessive wear.

Your score is

The average score is 0%

5/5 - (1 vote)

CDL Category Practice Tests

CDL Practice Test

How To Get A colorado Commercial Drivers License

Colorado residents the age of 18 or older can apply for their commercial driver’s license. Those between the ages of 18 and 21 are restricted to intrastate driving. Individuals must be 21 years or older to receive their Hazmat, School Bus, or Doubles/Triples Endorsements. All applicants must possess a DOT medical card issued by a FMCSA certified medical examiner in order to be eligible for their CDL.

Any applicants that fall under the following conditions are automatically disqualified from receiving a CDL.

Having more than one driver’s license.
Being disqualified for commercial driving privileges in another state.
Being convicted in the past two years of driving a commercial vehicle impaired.
Having a suspended, canceled, denied, or revoked driver’s license.

All Colorado residents who are seeking to get their commercial driver’s license must pass both one or more knowledge tests as well as a practical skills test.

Endorsements
T – Double And Triple Trailers
N – Tanker Vehicles
P – Passenger
S – School Bus
H – Hazardous Materials
X – Tanker With Hazmat

Hit the Open Road

colorado CDL License Test Tips

All applicants are required to take one or more knowledge tests to display their comprehension of the commercial driving law. Class A, B, and C applicants must complete a 50 question assessment. Class A applicants are responsible for completing an additional 20 questions all based on the subject of combination driving. Applicants seeking endorsements will be required to complete a knowledge test specific to the endorsement sought. The endorsement tests range between 20 and 30 questions. All applicants must receive a score of 80 percent or higher to pass a knowledge test.Applicants for a Colorado CDL must complete a skills test is order to receive their CDL. The skills assessment is comprised of an on-road test, vehicle inspection, and basic controls skills test. Applicants who are applying for endorsements are required to complete the skills test with the type of vehicle the endorsement is intended for.

Additional Information

Information on the Colorado Division of Motor Vehicles

The State of Colorado Department of Revenue Division of Motor Vehicles regulates the CDL requirements and testing in Colorado. To get more information contact them via:

Website: https://www.colorado.gov/pacific/dmv/im-commercial-driver

Phone: 303.205.5600

Additional Colorado CDL Helpful Links

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

colorado CDL Practice Test

CDL Category Practice Tests

CDL Practice Test

How To Get A colorado Commercial Drivers License

Hit the Open Road

colorado CDL License Test Tips

Additional Information

Information on the Colorado Division of Motor Vehicles

Additional Colorado CDL Helpful Links

colorado
CDL Practice Test