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

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

Loaded into racks attached to the vehicle.

All of these answers are correct.

In boxes that will keep them from turning over.

Loaded in an upright or horizontal position.

2 / 40

What does outage mean?

It is the movement of the liquid.

It is how quickly the tanks drain.

It is the allowance needed for the expansion of liquid.

It is the weight of the liquid.

3 / 40

Which of the following should you NOT do if you experience a tire failure?

stay off the brake pedal

hold the steering wheel firmly

you need to be aware that a tire has failed

engage the brakes hard and immediately

4 / 40

Select how you would check the truck's slack adjusters.

all of these answers are correct

listen for any strange noises while applying pressure to the brake pedal

while wearing gloves, pull hard on each slack adjuster that you can reach

brake hard after accelerating

5 / 40

How often should you check the tires on a placarded trailer that has dual tires?

Once every 100 miles.

Each time you stop.

Once every three hours.

Start of each day and every time you stop.

6 / 40

Why are you required to take an exam about air brakes?

you would have to get a CDL with a restriction otherwise

all trucks have air brakes

you cannot receive a CDL at all otherwise

it is a federal requirement

7 / 40

You can be sure air is supplied to the second trailer by:

you should get out and listen for air flowing through the lines

watch the air gauge for a drop of 30 psi

while driving at 10 mph apply the hand valve you should stop at the same in the same distance as a single trailer driving at 5 mph

going to the rear of the second trailer and open the emergency line shut off

8 / 40

When checking for_____you are looking for dripping fluids or puddles on the ground below the transmission or engine.

leaks

coolant level

power steering fluid

air brake system

9 / 40

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

there is nothing to be hooked up

the service and emergency air lines

the electrical service line

the safety bar

10 / 40

What is the stopping distance for a tractor trailer that is traveling at 55 mph on dry pavement?

about 150 feet which is 1/2 of a football field

about 300 feet which is about a football field length

about 600 feet with is about two football field lengths

about 200 feet which is 2/3 of a football field

11 / 40

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

True, but only on downgrades

True, but only in ideal conditions

False

True

12 / 40

In column 1, the "D" symbol means:

Domestic restrictions

Domestic transportation

Devices

Detonators

13 / 40

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

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

There will not be as much front to back 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.

14 / 40

In the event of a tire failure you should...

accelerate quickly until you find a place to pull over

stay off the brake and hold the steering wheel firmly

pump the brakes until you come to a stop

disengage the clutch so you are in neutral gear

15 / 40

The manual says you should look _____ ahead while driving.

15 to 20 seconds, at highway speeds, about a half of a mile

9 to 12 seconds, at highway speeds, about a quarter of a mile

12 to 15 seconds, at highway speeds, about a quarter of a mile

5 to 8 seconds, at highway speeds, about an eighth of a mile

16 / 40

What will probably happen if the converter dolly is still under the second trailer and the pintle hook is unhooked?

the air lines will explode

the dolly tow bar could fly up

the engine brakes will unlock

nothing will happen

17 / 40

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

Free walls

Bulktears

Layers

Baffles

18 / 40

Select the true statement in regards to converter dollies:

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

they typically require a hand converter

they typically have small braking power because of their size

they typically do not have spring brakes

19 / 40

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

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

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

the kingpin is resting behind the fifth wheel

the top of the kingpin lines up with the locking jaws

20 / 40

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

when parking at a loading dock

when parking on a downgrade

never

when parking in a commercial lot

21 / 40

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

To prevent any steering problems.

To make sure the electrical connections are good.

To decease heat and noise.

To make sure that uncoupling easier.

22 / 40

You should_____when the low pressure warning is activated:

maintain highway speed and keep an eye on your air pressure gauge

come to a safe stop while you still have control of the brakes

pump the brake pedal to come to a stop immediately

wait until the air brakes kick in automatically

23 / 40

After deciding the type of evacuation that is necessary, the next step you must take is:

Opening the emergency exits.

Securing the bus.

Dangle the radio microphone out of the driver window for later use.

Notifying the dispatch office of the evacuation.

24 / 40

How should the hand valve be used?

only when the trailer is loaded to its maximum weight

to test the trailer brakes

only when accompanied by the foot brake

only when accompanied by the service brakes

25 / 40

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

With any window open.

At any time.

Unless on a scenic tour bus.

In a closed building.

26 / 40

The average person requires how many hours of sleep per 24 hour period?

6 or 7

8 or 9

7 or 8

5 or 6

27 / 40

Carry-on baggage cannot be stored:

Under the seat.

On the seats.

Behind the seats.

In the aisles and stairwells.

28 / 40

How far away are you required to park from a bridge, tunnel, or building if you are carrying Division 1.2 or 1.3 materials?

At least 300 feet

At least 400 feet

At least 500 feet

At least 600 feet

29 / 40

How should you know when to shift?

road speed and wind speed

every 3 to 5 seconds or engine speed

engine speed and the shift indicator light

engine speed and road speed

30 / 40

Select the true statement about tractor protection valve:

all of these answers are correct

if the air supply drops to a certain level it will automatically close itself

it is closed by the parking brakes

it provides the air supply to the brake system

31 / 40

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

1 to 2 inches

1/4 to 1/2 of an inch

it is dependent on the load you are carrying

zero

32 / 40

Which of the following is a necessary qualification for non-bulk packaging?

Maximum water capacity of 454 kg or less if used as a receptacle for gases.

All of these answers are necessary qualifications.

A maximum capacity of 450 l or less if it is used as a receptacle for liquids.

Maximum net mass of 400 kg, or less than 450 l if used as a receptacle for a solid.

33 / 40

You should____to check the free play of manual slack adjusters on S-Cam brakes.

apply the parking brake after stopping on level ground

after parking on a slight grade, release the parking brake, activate the service brakes and check for vehicle movements

drain off air pressure before adjusting after parking on level ground

chock the wheels and release the parking brakes after parking on a level ground

34 / 40

The basic description of a hazardous material includes the hazard class, the identification number, and the proper shipping name. Which one must appear first on the shipping paper?

The box number.

The hazard class.

The identification number.

The proper shipping name.

35 / 40

Air brake systems should not lose air faster than____when testing for air leakage rates in combination vehicles before applying the brake pedal.

2 psi a minute

6 psi a minute

3 psi a minute

5 psi a minute

36 / 40

Select the vehicle that off-tracks the most.

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

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 40-foot long trailer

37 / 40

Select the true statement about handling triples and doubles:

a tip over of the rear trailer can occur due to sudden movements of the steering wheel

triples and doubles handle the same as singles

because of the crack the whip effect, the rear trailer of a 100-foot triple is less likely to tip over

due to off-tracking, a triple bottom rig can come to a stop faster than a 5-axle tractor

38 / 40

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

none of these answers are correct

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

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

39 / 40

Select the true statement about baffled tankers:

It has hollow balls in it to slow the motion of the liquid in the trailer.

It has separate tanks.

None of the answers listed.

It has walls with holes inside for liquid to flow through.

40 / 40

You must have placards for explosives, poison gas or flammables exceeding:

100 pounds

Any amount

10 cartons

10 pounds

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