kentucky
CDL Practice Test

Welcome to the site for practicing questions on the Kentucky CDL test. The site is free and you are able to take the practice test as many times as you need to. Questions are from the KY CDL Manual and cover items such as Air Brakes, Double/Triple Trailers, Hazardous Materials, and School Busses. 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

Air pressure should build___with a dual air system.

from 50 to 80 psi in 60 seconds

from 85 to 100 psi in 45 seconds

from 60 to 100 psi in 45 seconds

from 70 to 125 psi in 60 seconds

2 / 40

The CDL manual indicates the last step on picking up students at the bus stop is as follows:

Activate the amber flashing caution lights to warn vehicles that the bus will stop to load passengers soon.

Place transmission in park or neutral and set parking brake.

Open the service door just enough to activate the alternating red light when traffic is in a safe distance from the bus.

Make a final check to confirm all traffic stops before opening the bus door and signaling students to approach.

3 / 40

Select the true statement in regards to as why you should make sure the fifth wheel plate is greased as recommended:

To decease heat and noise.

To make sure that uncoupling easier.

To prevent any steering problems.

To make sure the electrical connections are good.

4 / 40

What is the best way to figure out how many seconds of following distance you have?

wait until a vehicle passes a shadow or landmark, then count the seconds until you pass it

get 1/4 closer to the car in front of you, then back off again multiply how long this took you by 4 for following distance

use the stopwatch on your phone to try to determine how long before you reach a mile marker after the car in front of you appeared to reach it

text a friend and tell them to text you back in ten seconds and see how long that seemed to take compared to how far you traveled

5 / 40

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

The posted speed limit may be too high for safety.

All answers listed.

The higher center of gravity on a tank truck.

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

6 / 40

Select the true statement in regards to converter dollies:

they typically do not have spring brakes

they typically have small braking power because of their size

they typically require a hand converter

they typically have a lot of stopping power because of their size

7 / 40

This object should not be damaged, bent, or rusted through and be evenly centered with the tires and dual wheels evenly separated.

Budd spacing or spacers

Tire rims

Lug bolts

All answers listed

8 / 40

It is important to know the outage required for the liquids you carry because:

None of these answers are correct.

Some liquids will expand more than others when warm.

Tank baffles may not always be permitted with outage.

Some of the denser liquids don't need any.

9 / 40

Within 3 minutes, this gauge pressure should build to 90 psi from 50 psi.

Voltmeter gauge

Coolant pressure gauge

Oil pressure gauge

Air pressure gauge

10 / 40

What should you do if you start a trailer skid?

release the brakes to get traction back

use your trailer hand brake

slowly apply a firm pressure to the brakes

quickly step on the brakes

11 / 40

Select when you should use the hand valve to park a combination vehicle.

when parking in a commercial lot

when parking on a downgrade

never

when parking at a loading dock

12 / 40

These tires should have a minimum tread depth of 4/32 inches.

Steering axle tires

Donut tires

Drive axle tires

Non-steering axle tires

13 / 40

If there is no traffic light or attendant, how far from the draw of a drawbridge must you stop?

5 feet

50 feet

100 feet

30 feet

14 / 40

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

accelerate

pump the brakes

shift down 2 gears

ride the brakes

15 / 40

What should you hook up before backing a tractor to a trailer for coupling?

the safety bar

the service and emergency air lines

the electrical service line

there is nothing to be hooked up

16 / 40

Where are the two main places where the hazardous material identification number appears?

On the shipping papers and on a secret document in the driver's wallet.

On the shipping papers and on the package.

On the package and on paperwork at the shipping point of origin.

On the package and on paperwork at the shipping destination.

17 / 40

Select the true statement in regards to the liquid inside of a bulk tank causing a tank truck to roll sideways.

It can occur even when driving at the posted speed limit.

It can occur even with baffles inside that slow the flow.

It can occur when driving through a curve.

All answers listed.

18 / 40

It is good practice to_____when uncoupling.

make sure the electrical cable is hanging with the plug end down

have the glad hands coupled together

have the glad hands coupled to the dummy couplers

all answers are appropriate

19 / 40

When you discharge an unruly passenger, you must choose a place that is:

Off the regular route.

As safe as possible, or the next stop.

The next stop.

Dark and poorly lighted.

20 / 40

When approaching railroad tracks, stop your bus:

5-10 feet before railroad tracks.

Only if you have manual transmission, then proceed with flashers on.

15 and 50 feet before railroad crossings.

On the tracks so you can see if the train is coming.

21 / 40

You should___to reduce the air leakage rate.

leave the engine running while charging the air system

release the service brake after turning off the engine

release the service brake as the engine is running

monitor the air pressure gauge as you press on the brake pedal

22 / 40

At what "cut out" level does the governor stop pumping air?

100 psi

75 psi

150 psi

125 psi

23 / 40

When inspecting your bus, you must make sure that:

Emergency exit handles are secure.

Every handhold and railing is secure.

Rider signaling devices are working.

All of these answers are correct.

24 / 40

Which of these is a good rule for backing a straight bus?

Back toward the side opposite the driver.

Back quickly while no one is coming.

Back and turn toward the driver's side.

Use your head as the mirrors are unreliable.

25 / 40

When does stab braking occur?

apply pressure all the way on the brake pedal

when the wheels lock up, release the brakes

when the wheels start rolling, apply the brakes

all of these answers are correct

26 / 40

Alcohol evaporators in some air brake systems help to:

decreases the risk of water in the air brake valves in cold weather

cleans out oil from the air lines

it removes fuel from the air lines

decrease the chances of ice in the air brake valves in cold weather

27 / 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 7—radioactive materials

Class 1—explosives

Class 3—flammable liquids

28 / 40

What is the main difference between a portable tank and a cargo tank?

Cargo tanks are permanently attached, portable tanks are temporarily attached.

Portable tanks must additionally show the owner or lessee's name on them.

All of these answers are correct.

Cargo tanks are filled while on the vehicle, portable tanks are filled while off the vehicle.

29 / 40

What is the minimum amount of distance you should maintain when driving at 50 mph in ideal conditions with a 100 ft twin trailer combination?

6 seconds

8 seconds

11 seconds

13 seconds

30 / 40

Rods, connecting links, and arms from the steering box to the wheel are a part of the:

Braking system

Power steering fluid

Steering linkage

CB radio

31 / 40

Select the vehicle that off-tracks the most.

a 5-axle tractor that is towing a 52-foot long trailer

a 5-axle tractor that is towing a 45-foot long trailer

a 5-axle tractor that is towing a 32-foot long trailer

a 5-axle tractor that is towing a 40-foot long trailer

32 / 40

When inspecting the_____you pump the pedals 3 times and then hold it down for 5 seconds feeling for no movement to occur.

emergency brakes

hydraulic brakes

all answers listed

engine brakes

33 / 40

Select why you should not use the trailer hand valve while driving:

there is a possibility it will make the trailer skid

you should only ever use the parking brake

it will cause the tractor to shake

it does not work as well as the foot brake does

34 / 40

You must first______to supply air to the trailer.

push in the tractor protection valve

turn off the engine so you can hear the brakes

pull out the tractor protection valve

cross the air lines to check for the presence of leaks

35 / 40

This object should be free of shiny treads, rust, free of cracks and distortions.

Bolt spacers

Rims

Lug nuts

None of the answers listed

36 / 40

Which signals may be used to warn of a stopped vehicle that contains explosives?

All of these answers are correct

Signal fires

Flares or fuses

Reflective triangles

37 / 40

Which of the following must be closed while the bus is in motion?

Roof vents

Both hatches

Emergency windows

Windows

38 / 40

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

The bus operators manual.

The certification on the driver side door.

Red indicator lamp on the brake cylinder.

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

39 / 40

When is it best to wear your seat belt?

Only when you will be driving over 35 mph.

Only if your bus holds more than 27 people.

Always.

Only if required by company policy.

40 / 40

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

the dolly tow bar may fly up

the fifth wheel may be misaligned

the spring brakes may release

the kingpin may snap in half

Your score is

The average score is 0%

4/5 - (3 votes)

CDL Category Practice Tests

CDL Practice Test

How To Get A kentucky Commercial Drivers License

All applicants must possess a valid Kentucky Class D driver’s license and meet all the below requirements to be eligible for their CDL. Applicants who are age 18 may apply for their CDL license. These drivers are restricted to in-state driving, may not operate school buses, or haul hazardous materials. Applicants must be 21 years of age or older to drive out-of-state and receive their School Bus and/or Hazardous Materials Endorsement(s). All drivers applying for their commercial driver’s license must provide the Division of Driver Licensing with a valid DOT medical card.

Drivers who fall into the below categories are disqualified from receiving their CDL:

Having more than one driver’s license.
Current license is suspended or revoked.
Being convicted of driving under the influence of alcohol within 24 months of submitting an application.
Being convicted of two or more serious moving violations within a 36 month period.

All CDL applicants are required to complete both knowledge tests as well as a practical skills test.

Endorsements
T – Double/ Triples
P – Passenger
N – Tank
H – Hazardous Materials
S- School Bus

Hit the Open Road

kentucky CDL License Test Tips

General knowledge tests for Class B and C driver applicants are comprised of 50 questions. Those applying for a Class A CDL are required to complete the initial 50 questions as well as 20 additional questions about combinations. Each endorsement requires the applicant to complete a separate knowledge assessment. Endorsements for Doubles/Triples, School Bus, Tank, and Passenger Transport are comprised of 20 questions. The Hazardous Materials Endorsement requires a 30 question test. Lastly, the removal of the Air Brake Restriction is comprised of 25 questions. All assessments must be passed with a score of 80 percent or better.

All applicants will need to take a skills test that assesses their ability to operate their intended vehicle. Once applicants receive their Kentucky CDL permit after completing the knowledge assessment(s), they may apply for the skills test 14 days later. The skills test is comprised of three different parts that will all be assessed in one testing session. These areas include the pre-trip inspection, basic control skills, and driving test. All applicants must successfully show their skills in all three of these areas to be considered eligible for their CDL.

Additional Information

Information on the Kentucky Division of Driver Licensing

The Kentucky State Police regulates CDL requirements in Kentucky. To get more information contact them via:

Website: http://kentuckystatepolice.org/drivers-testing/

Phone: 502.782.1800

Additional Kentucky CDL Helpful Links

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

kentucky CDL Practice Test