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

Bus drivers must have a commercial driver license if they drive a vehicle designed to seat more than:

20 or more persons, excluding the driver.

16 or more persons, including the driver.

10 or more persons, including the driver.

15 or more persons, including the driver.

2 / 40

Select the best description of a baffle tank:

They are tanks divided down into multiple smaller tanks.

None of the answers listed.

It is one large tank.

They are divided and have holes for liquid to flow through controlling surge.

3 / 40

For what reason do you keep the starter switch key in your pocket during the pre-trip inspection?

you will need it to open the side box

so you don't lose it

you will need it to inspect the trailer

so no one moves the vehicle while you are inspecting underneath it

4 / 40

How high should you crank the landing gear?

until the crank handle is loose

as high up as it will go

so that you can clear railroad tracks

for it to be 6 inches above the ground

5 / 40

Select the true statement in regards to brake drums:

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

They are bolted to the wheels.

Hold the brake linings and shoes.

All of these answers are correct.

6 / 40

A slack adjuster is:

a lever that connects the brake chamber push rod with the foundation brake camshaft

a lever that connects the brake drum to the brake shoe

a lever that connects the return spring and the brake chamber push rod

a lever that connects the brake camshaft with the brake chamber

7 / 40

It is good practice to_____when uncoupling.

have the glad hands coupled to the dummy couplers

have the glad hands coupled together

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

all answers are appropriate

8 / 40

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

below the locking lever

sticking straight up

threaded through the locking lever

above the locking lever

9 / 40

How can you check slack adjusters?

by using a fixed wrench

it is not possible to check manually

by frequently checking the pressure gauge

by pulling hard on each slack adjuster

10 / 40

Which of the following is NOT a part of the steering system?

main spring

tie rod

steering knuckle

hydraulic fluid reservoir

11 / 40

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

the kingpin is resting behind the fifth wheel

the top of the kingpin lines up with the locking jaws

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

12 / 40

The front trailer supports should be____before driving away.

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

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

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

raised fully and the crank handle secured in its bracket

13 / 40

Which of the following materials would be an acceptable floor liner for moving Division 1.1 or 1.2 materials?

Stainless steel

All of these answers are correct

Carbon steel

Non-ferrous metal

14 / 40

In what position should the shut off valves on a the rear of the front trailer be in on a set of double trailers?

in an open position

in a halfway open position

in a 1/3 way open position

in a closed position

15 / 40

Which of the following statements about bus evacuation is true?

If time allows, walk through the bus and close all windows.

If time allows, backup to the stop before evacuating the bus.

If time allows, notify the police.

If time allows, notify the dispatcher about evacuation location, conditions, and type of assistance needed.

16 / 40

When transporting hazardous waste, you must:

Carry a uniform hazardous waste manifest in the truck.

Sign a uniform hazardous waste manifest.

Have the word "waste" before the name of the material on the bills.

All of these answers are correct.

17 / 40

Select the statement that describes smooth bore tanks:

None of the answers listed.

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

They are divided down into smaller tanks.

They are 1 large tank.

18 / 40

A bus has a GVWR of 22,000 pounds and seats 24 passengers. What CDL class is this vehicle?

Class D

Class B

Class A

Class C

19 / 40

A drawbridge does not have a traffic light showing green or a traffic control attendant. How many feet before the draw of a bridge must a bus driver stop?

At least 25 feet.

At least 75 feet.

At least 100 feet.

At least 50 feet.

20 / 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 identification number.

The hazard class.

The proper shipping name.

21 / 40

You should_____when the low pressure warning is activated:

wait until the air brakes kick in automatically

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

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

pump the brake pedal to come to a stop immediately

22 / 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.

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

Do not transport intoxicated passengers.

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

23 / 40

In Column 1 the symbol "I" means:

Invalid substance.

International restrictions.

Iodine.

International transportation.

24 / 40

You should keep a minimum of ____between another vehicle and the double trailer with 100 ft truck driving at 30 mph.

10 seconds

13 seconds

15 seconds

8 seconds

25 / 40

What product is typically carried in a liquid tank trailer without baffles?

Fuel.

Fertilizer.

Food or milk products.

Hydrogen peroxide.

26 / 40

Select the statement of what you should not do if you are required to drive through flowing water or deep puddles.

shift into a lower gear

increase engine rpm

quickly turn the steering wheel side to side

drive at a high speed

27 / 40

Of the following hazardous material classes, which is the most dangerous?

Division 63

Division 62

Division 61

Division 64

28 / 40

What handling effect will baffles have?

None of the answers listed.

There will be less side to side surging.

There will be an increase in slow surge.

There will be less of surging front to back.

29 / 40

The minimum tire tread depth for front tires is:

3/8-inch

1/2-inch

4/32-inch

1/32-inch

30 / 40

Select the true statement about baffled tankers:

None of the answers listed.

It has separate tanks.

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

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

31 / 40

Select the statement that tells you how you can check the low pressure warning signal.

Turn the electrical power off and apply pressure on and off the brake pedal to decrease air tank pressure. The low air pressure warning signal must come on before the pressure drops to less than 30 psi in the air tank.

Turn the electrical power on and apply pressure on and off the brake pedal to decrease the air tank pressure. The low air pressure warning signal must come on before the pressure drops to less than 60 psi in the air tank.

The low pressure warning signal is only testable by the factory.

Turn the electrical power on and apply pressure on and off the brake pedal to increase air tank pressure. The low air pressure warning signal must come on before the pressure increases to more than 60 psi in the air tank.

32 / 40

Remember to____when connecting the converter dolly to the rear trailer.

all answers listed

check the trailer height

lock the trailer brakes

ensure that the landing gear is slighty off of the ground

33 / 40

Select the true statement about converter dollies:

they typically require a glad hand converter

all answers listed

they usually do not have spring brakes

because of their small size they have little braking power

34 / 40

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

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

On the shipping papers and on the package.

On the package and on paperwork at the shipping destination.

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

35 / 40

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

two

one

six

four

36 / 40

What is the purpose of a baffle?

It controls the surge of liquid forward and backwards.

It allows you to haul loads that are mixed.

It stops side to side surging.

It makes it easier to clean the tanker out.

37 / 40

Water is drained from the compressed air tanks because:

the water will over cool the compressor

braking power is decreased due to the low boiling point of water

to keep the oil in the air compressor clean

the water could freeze in cold weather and cause braking failure

38 / 40

School buses are one of the safest means of transportation. What two key factors contribute to this impressive safety record?

School district policies and police involvement.

Vehicles and road conditions.

Bus drivers and driver training.

Vehicles and drivers.

39 / 40

How should the pintle hook be when backing a dolly under the second trailer?

in the latched position

removed from the dolly

in a halfway open position

in the unlatched position

40 / 40

When does your vehicle's single brake system need an adjustment?

if the compressor cuts out at between 70 and 90 psi

when the pressure builds from 85 to 100 psi in less than 1 minute

when the governor stops between 75-90 psi

if the pressure builds from 50 to 75 psi in less than 3 minutes

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

CDL Category Practice Tests

CDL Practice Test

How To Get A kentucky Commercial Drivers License

Hit the Open Road

kentucky CDL License Test Tips

Additional Information

Information on the Kentucky Division of Driver Licensing

Additional Kentucky CDL Helpful Links

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CDL Practice Test