delaware
CDL Practice Test

This site is available to practice and prepare to take the Delaware CDL test. These tests are free and you are able to take them as many times as you would like. 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

Select the action that is not appropriate when driving on slippery roads:

avoid having traffic in your side space

use a light pressure on the brake and accelerator pedals

none of the answers listed

use a speed retarder or engine brake

2 / 40

Which of the following is a clue another driver is impaired:

All of these answers are correct.

Stopping at a green light, or waiting too long at a stop.

Exiting the interstate when there's no gas station visible.

Open window in warm weather.

3 / 40

If you do become sleepy while driving, you should _____.

turn up the radio

stop to sleep

roll down the windows

drink caffeinated beverages

4 / 40

Who is responsible for packaging, labeling, and preparing the hazardous material shipping papers for a common carrier?

The carrier

The shipper

Your spouse

The driver

5 / 40

Play of the steering wheel should not exceed:

15 degrees

5 degrees

30 degrees

10 degrees

6 / 40

You should check the_____when loading small tanks equipped with bulkheads.

distribution of the weight

fuel to air ratio

percentage of water

expansion rate

7 / 40

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

never

when parking in a commercial lot

when parking on a downgrade

when parking at a loading dock

8 / 40

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

threaded through the locking lever

sticking straight up

above the locking lever

below the locking lever

9 / 40

What should you do before you begin to couple?

inspect the condition of the frame of the tractor

check your path for any hazards

activate the spring brakes

position the fifth wheel beforehand

10 / 40

Overhead inside mirror is used to:

see the area where students exit the bus

see all of the students

monitor traffic that approaches and enters the blind spot area

see the blind spot immediately behind the bus

11 / 40

What should you do if you start a trailer skid?

release the brakes to get traction back

quickly step on the brakes

use your trailer hand brake

slowly apply a firm pressure to the brakes

12 / 40

Select the portion of the combination vehicle that is most likely to turn over suddenly when pulling a double trailer:

all are equally likely

the front trailer

the tractor

the back trailer

13 / 40

Which seats not securely fastened to the bus are usually allowed?

None of these answers are correct.

Window seats.

Any of the last row seats.

The driver's seat only.

14 / 40

What is the purpose of a driver placarding his or her vehicle?

Forcing other drivers to stay 20 feet away in every direction.

Communicating risk.

Giving people something interesting to look at while driving.

Warning those with children to drive in another lane.

15 / 40

When using turn signals, which of the following should be avoided?

signal when you are merging into traffic

signal just before you start to make a turn

signal when you want to change lanes

signal before you exit

16 / 40

The direction of liquid movement not prevented by baffles is:

Back to front.

None of the answers listed.

Side to side.

Bottom to top.

17 / 40

Where are shut off valves located on trailers that are doubles or triples?

on service air lines

on emergency air lines

on emergency and service air lines

on parking brake lines

18 / 40

Select the true statement about dual air brake systems.

all of these answers are correct

one system controls the front axle and the other controls the rear axle

there is a single set of brake controls

there is a primary system and a secondary system

19 / 40

What is the earliest way to notice a trailer skid?

you can feel a jerk in the back of the tractor

you can feel it pulling your steering wheel

you can see it in your mirrors

you can hear the tires squealing

20 / 40

What color and shape is the trailer air supply control?

it is a square knob that is yellow

it is an 8-sided knob that is red

it is a square knob that is red

it is a triangle-shaped knob that is red

21 / 40

Never refuel your bus:

In a closed building with passengers on board.

With a higher grade of fuel.

Without a static chain.

With any of the windows open.

22 / 40

At 55 miles-per-hour it takes about 6 seconds to stop a fully loaded truck and the braking distance is:

about two truck lengths

about two car lengths

about 1/4 mile

about the length of a football field or 100 yards

23 / 40

You may use DANGEROUS placards instead of separate placards for each Table 2 hazard class when:

The correct answer is not listed.

You have not loaded 2,205 pounds or more of any table 2 hazard class material at any one place (you must use the specific placard for this material).

Both of these conditions must be met.

You have 1,001 pounds or more of two or more table 2 hazard classes, requiring different placards.

24 / 40

The correct trailer height when coupling the rear trailer is:

the kingpin is touching the fifth wheel

there is 5 inches of space between the lower and upper fifth wheel

when the locking jaws are open around the kingpin

slightly lower than the center of the fifth wheel

25 / 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

26 / 40

The gauge that needs to come up to normal levels after starting the engine within a few seconds is _____.

blood pressure

air brake pressure

oil pressure

oil temperature

27 / 40

Why is the proper adjustment and use of all mirrors so vital to the safe operation of the school bus?

In order to observe the danger zones around the bus.

In order to see if small vehicles are driving in the bus blind spots.

In order to observe the danger zones around the bus and look for the students, traffic, and other objects in this area.

In order to clear up blind spots around the bus.

28 / 40

What keeps air in the tanks should the air compressor develop a leak?

the tractor relay valve

the air compressor

the engine protection valve

the one-way check vavle

29 / 40

The best way to go into a curve is to decrease your speed going into the curve and then ____going through it.

slightly accelerate

shift down 2 gears

ride the brake

none of the answers listed

30 / 40

If the hazardous materials are classified as FORBIDDEN you should:

Place the materials in the front of the trailer.

Remove the placards from the trailer.

Refuse the load.

Take special caution in transporting the material.

31 / 40

If your bus is equipped with an emergency exit door, it must:

Be secured when the bus is being driven.

Always have a red door light turned on.

Not have any signs, stickers, or markings near it.

All of these answers are correct.

32 / 40

What action should you take if there is no phone available and you discover your hazardous materials shipment leaking at a rest stop?

Keep driving, slowly and cautiously, until you reach a phone.

Leave your truck parked with emergency lights on and walk for help.

Keep driving for help as quickly as possible.

Send someone for help with all the necessary information.

33 / 40

Select the true statement about empty trucks:

They can take longer to stop than a truck with a full tank.

They have better traction on wet roads than full tanks.

All answers listed.

They come to a stop faster when you use only the emergency brake.

34 / 40

You should turn off your engine when loading flammable liquid unless:

You are loading at night and need the headlights.

You are a non-smoker.

The material does not need a placard.

You need the engine to run the pump.

35 / 40

Operating a motor vehicle with the intent of doing harm to others or physically assaulting a driver or their vehicle is known as?

tailgating

aggressive driving

defensive driving

road rage

36 / 40

If you are hauling hazardous materials and have ___ tires on your vehicle, you must stop and check them every time you park.

dual

treaded

radial

bias

37 / 40

The method for testing hydraulic brakes for leaks is to _____.

hold the brake down for 5 seconds and listen for leaks

pump the brake pedal 5 times and apply firm pressure for 3 seconds the pedal should not move

pump the brake pedal 3 times and apply firm pressure for 5 seconds the pedal should not move

all of these answers are correct

38 / 40

Remember to_____to prevent rollovers.

have the load as low to the ground as possible

drive slowly around turns

all answers listed

have the load centered

39 / 40

A leak rate for a straight truck or bus air brake system should not exceed _____psi per minute when the engine is off and the brakes are released.

40 / 40

You should brake on a long steep downgrade hill as a supplement to the braking effects of the engine

yes

when the GVCW is above 20,000 lbs

when the vehicle is runaway

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CDL Category Practice Tests

CDL Practice Test

How To Get A delaware Commercial Drivers License

Those who are 18 years of age and older can apply for their CDL. To receive privileges for out-of-state driving, doubles/triples, hazmat, and transporting vehicles, residents must be at least the legal age of 21 years old. All CDL applicants are required to comply with the MCSR 49 CFR 391.41 section of the Federal Codes regarding commercial driving medical requirements. Individuals must present a medical examiner’s certificate at the time of their CDL application.

Any of the following will automatically disqualify an applicant from receiving their CDL:

Having a revoked, suspended, canceled, or denied driver’s license.
Being convicted in the past 24 months of driving impaired in a commercial vehicle.
Having disqualified CDL privileges in another state.
Possessing more than one operator’s license.

All applicants are required to complete an on-site vision test, knowledge test(s), and a practical skills test. All tests must be successfully passed before a Delaware resident can be issued their CDL.

Endorsements
S – School Bus
X – Tank and Hazmat
T – Doubles and Triples
P – Passenger
N – Tank Vehicles
H – Hazardous Materials

Hit the Open Road

delaware CDL License Test Tips

Delaware residents must complete, at the minimum, one knowledge test to be considered eligible for a CDL. Depending on the Class and the Endorsements that are sought, individuals may have to undergo additional testing. All tests must be passed with a score of 80 percent or more. General knowledge tests for Class B and C drivers are 50 questions. Those seeking their Class A will have 50 general knowledge questions with an additional 20 questions about combination driving. Endorsements and the Air Brake Restriction Removal require additional knowledge tests that are between 20 and 30 questions each.Once an individual passes their knowledge test they are given a commercial learning permit (CLP). After waiting 14 days, the holder can take their skills test. This is a three part test that assesses the individual’s ability to operate a commercial motor vehicle. The test includes a pre-trip inspection, a driving test, and a basic controls test. All three parts must be successfully passed for the applicant to be eligible for their CDL. If applying for a special endorsement, the individual must take their test in the vehicle the endorsement is for.

Additional Information

Information on the Delaware Division of Motor Vehicles

The State of Delaware Division of Motor Vehicles provides oversight and administration for the CDL requirements and testing in Delaware. To get more information contact them via:

Website: https://www.dmv.de.gov/DriverServices/drivers_license/CDL/index.shtml

Phone: 302.326.5000

Additional Delaware CDL Helpful Links

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

delaware CDL Practice Test