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 is the benefit of ABS?

it decreases your stopping distance

all of these answers are correct

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

it provides an added layer of safety for truck drivers

2 / 40

When checking the wheelchair lift, the things you should look for are:

Bent or dinged lift floor.

Leaking, damaged, or missing parts and that the lift is fully retracted and latched.

Leaking, damaged, or missing wheelchairs.

Stripped screw drive linkages and fluid drips.

3 / 40

Charter drivers should not:

Remind riders about rules once trip begins.

Allow riders on the bus until departure time.

Mention rules at the start of the trip.

Explain rules at the start of the trip.

4 / 40

How should the trailer be lined up when preparing to back the tractor up?

about 12 degrees to the right

directly behind the trailer

directly in front of the trailer

about 12 degrees to the left

5 / 40

When driving with multiple trailers, which one should be right behind the tractor?

the trailer with the smallest road

the trailers shortest in length

the trailer longest in length

the trailer with the heaviest load

6 / 40

What is the service air line controlled by?

the relay vavle by sending air pressure from the trailer air tank to the trailer brake chambers

the pressure applied to the trailer hand brake or by the foot brake

all answers listed

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

7 / 40

You are inspecting the_____when looking for broken welds, cracks, holes, or other damage to the longitudinal frame member, cross members, box, and floor.

catwalk

frame

apron

fifth wheel

8 / 40

Which of the following about the front tires on a commercial bus is true?

Must not have recapped or regrooved tires.

Can be recapped, but never regrooved.

Can be regrooved or recapped as long as they have 4/32 tread depth.

Must not be recapped, but can be regrooved.

9 / 40

You must first______to supply air to the trailer.

pull out the tractor protection valve

turn off the engine so you can hear the brakes

push in the tractor protection valve

cross the air lines to check for the presence of leaks

10 / 40

How much space should there be between the lower and upper fifth wheel?

zero

1 to 2 inches

1/4 to 1/2 of an inch

it is dependent on the load you are carrying

11 / 40

You should_____when an emergency requires you to quickly stop your tanker.

use the emergency brakes only

use stab or controlled braking

keep a firm pressure on the brake pedal

turn off the abs and brace for impact

12 / 40

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

longer reaction time

the lines are hotter

none of the answers listed

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

13 / 40

Start by___when coupling.

coupling the tractor to the second trailer

coupling the converter hook to the pintle tongue of the first trailer

having the second trailer against the dock

backing the converter dolly under the second trailer

14 / 40

If you are carrying Division 1.2 or 1.3 materials, how far away must you park from the traveled portion of the roadway?

At least half a mile

At least five feet

At least twenty feet

At least ten feet

15 / 40

You should_____when checking the slack adjusters on S-Cam brakes.

pull on the slack adjusters after draining the air from the system

make sure there is an inch of leeway in each direction for the slack adjuster

pull on the slack adjuster while the parking brakes are on

pull hard on each slack adjuster while wearing gloves

16 / 40

The school bus driver may be the only contact person from school system some parents meet. The percentage of such parents is as high as:

0.5

0.65

0.85

0.72

17 / 40

Which of these statements about speed management and braking is true?

Stopping time increases by one second for each 10 mph over 20 mph.

The total stopping distance of a bus is the distance it takes to stop once the brakes are applied.

The posted speed limit will always allow you to stop safely.

You need about four times as much stopping distance at 40 mph as at 20 mph.

18 / 40

Do empty trucks have the best braking?

yes, but only on wet surfaces

yes, but only if the truck is newer than 1998

yes

19 / 40

How do you check the coolant level?

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

While wearing rubber gloves and safety glasses.

None of the answers listed.

Remove the radiator cap once it is at operating temperature.

20 / 40

This object should not be worn dangerously thin where visible.

The brake chambers

The air system lines

All answers listed

The brake linings

21 / 40

What are some things you should check on the front of your vehicle when doing the walk-around inspection?

tires, steering parts, suspension parts, headlights

low beams, high beams, four way flashers, turn signals

windshield, wipers, mirrors, hood latches

oil, transmission, air compressor, radiator

22 / 40

Air tanks need to be drained:

to keep the tanks cold when not in use

to keep the tanks warm when not in use

air tanks should absolutely never be drained

to prevent water and oil from building up in the tank

23 / 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 engine brake to kick on

the emergency line valve to release air

the service brakes more to a fully applied position

air leaving the open valve

24 / 40

Select the purpose of fanning air brakes:

it cools them down

it increases the air pressure

lower air pressure

it decreases the braking power

25 / 40

What kind of surge can occur in a tank with baffles?

Back to front

Side to side

Bottom to top

All answers listed

26 / 40

You should decrease to a safe speed before entering a curve and then_____through it.

shift down 2 gears

accelerate

ride the brakes

pump the brakes

27 / 40

Which of the following parts do not get checked in the Bus Interior inspection:

Seat coverings.

Emergency exit handles.

Signaling devices, including the restroom emergency buzzer, if the bus has a restroom.

Each hand-hold and railing.

28 / 40

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

Coolant

Gas tank

Oil pressure

Voltmeter/ammeter

29 / 40

When driving in very hot temperatures, you should:

check your tires every 2 hours or every 100 miles

all of these answers are correct

insure that you have enough antifreeze in the system

let your tires cool down (remain stopped) if they are too hot to touch

30 / 40

What is the standee line?

A line at the back of the bus where passengers must stand before exiting.

A line around each seat to help each passenger have a little personal space.

A 2 inch line on the floor that all passengers must stay behind.

A 2 inch line down the aisle to help keep passenger traffic flowing.

31 / 40

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

Stop, go, and stop.

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

Stop, look, and listen.

None of these answers are correct.

32 / 40

When transporting hazardous loads, you must check the tires at least:

Every 200 miles.

Twice every day.

Every six hours.

Every two hours or 100 miles.

33 / 40

How do you know when your brakes are fading?

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

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

34 / 40

What position should the tractor protection control valve be in after coupling?

mid position

raised

lowered

normal

35 / 40

"Outages" is the word to describe the amount of space required for liquids to expand in as they warm.

False, it's when the vehicle power system fails in some way

True

False, it's when the vehicle engine fails in some way

False, it's when the vehicle air braking system fails in some way

36 / 40

Select the true statement about emergency steering and tankers:

None of the answers listed.

Have a firm grip on the steering wheel before making quick movements of the steering wheel.

It is easier to counter steer than other vehicles.

Do not apply the brakes when making quick movements of the steering wheel.

37 / 40

What should the driver pay special attention to when driving smaller tanks?

The distrubition of weight.

The high center of gravity.

All answers listed.

The level of the fluid.

38 / 40

How do you determine if slack adjusters need to be adjusted?

release the parking brakes and service brakes

pull out the automatic slack adjustment control knob

activiate the parking brake and service brake

release the parking brakes and activate the service brakes

39 / 40

What are the liquid tight separations between compartments inside tanks called?

None of the answers listed

Waffles

Bulkheads

Layers

40 / 40

A tank vehicle:

Is a vehicle that can transport liquid.

Is a vehicle that can transport liquified gasses.

Is a vehicle that can transport bulk fertilizer.

All answers listed.

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