new jersey
CDL Practice Test

Welcome to the CDL practice test site for New Jersey. Questions from these tests cover rules and regulations in the NJ CDL manual. These questions are written to prepare you for the official NJ CDL test as you look to obtain your New Jersey CDL. You are welcome to take these New Jersey CDL permit practice tests as many times as you like as all of the tests on this site are free. 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

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

engage the brakes hard and immediately

stay off the brake pedal

you need to be aware that a tire has failed

hold the steering wheel firmly

2 / 40

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

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

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

Place transmission in park or neutral and set parking brake.

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

3 / 40

Your rig should be parked on__to uncouple double trailers.

a downgrade

level ground

the company's lot

grass

4 / 40

Do not tow or push a disabled bus with riders aboard the vehicle, unless:

Getting off the bus would be unsafe.

Bus is on a drawbridge.

You are also a class a tow truck driver.

Your employer tells you to.

5 / 40

Before transporting a sealed load, you must check:

a picture of whatever is inside

that you don't exceed gross weight and axle weight limits

all of these answers are correct

a small sample of whatever is inside

6 / 40

This object releases the fifth wheel locking jaw to allow uncoupling.

The arm bar

The locking pins

The apron

The release arm

7 / 40

Overhead inside mirror is used to:

Monitor traffic that approaches and enters the blind spot area.

See the area where students exit the bus.

See the blind spot immediately behind the bus.

See all of the students.

8 / 40

When conducting a pre-trip inspection, the most important item to verify is _____.

that the tire tread is sufficient for the expected driving conditions

that the registration is in the cup holder

that there are no leaks in the air brake system

that the radio transmits a signal

9 / 40

How often should you check the tires if your placarded trailer has dual tires?

Check tires every hour or 75 miles.

Check tires every 2 hours or 100 miles.

Check tires every 3 hours or 150 miles.

Check tires every 4 hours or 200 miles.

10 / 40

This object should be checked to make sure that the cap(s) are on tight, that it is secure, and there are no leaks.

Windshield fluid line

Fuel tank

Exhaust system

Air coolant system

11 / 40

How far before a railroad crossing should you stop your bus?

10 to 35 feet

100 feet exactly

50 to 75 feet

15 to 50 feet

12 / 40

How do you check the power steering fluid?

Undo the oil fill cap and check the level.

By looking through the reservoir sight glass.

Via the power steering fluid dipstick.

Via indicator light on the dashboard.

13 / 40

Make sure that_____before you back under a trailer.

the air brakes are in an off position

the air supply knob has been pushed it

the air supply knob has been pulled out

the trailer brakes have been locked

14 / 40

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

increase engine rpm

shift into a lower gear

quickly turn the steering wheel side to side

drive at a high speed

15 / 40

While completing the 3rd component of the air brake check of a combination vehicle, at what psi should the tracor protection valve and parking brake valve should pop out?

20 psi

They should never pop out

70 psi

40 psi

16 / 40

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

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

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

All of these answers are correct.

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

17 / 40

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

avoid having traffic in your side space

none of the answers listed

use a speed retarder or engine brake

use a light pressure on the brake and accelerator pedals

18 / 40

Always try to back toward the driver's side because

it's more comfortable for turning your neck

you can see better, watching the vehicle rear out the side window

all of these answers are correct

your truck will naturally pull toward the driver's side

19 / 40

What is the best way to stop all skids?

quickly turn the steering wheel side to side

restore traction back to the tires

accelerate and countersteer

use controlled or stab braking

20 / 40

After coupling with a trailer, what position should the front trailer supports be in before driving away?

raised to the top and then taken 3 cranks down and the crank handle stored in its bracket

in the fully raised position with the crank handle secured to its bracket

raised half way with the crank handle stored in the cab

none of the answers listed

21 / 40

It takes special care to drive tankers with liquid in them because:

The baffles create odd rocking motions.

The movement of the liquid even when the truck is stopped.

The low center of gravity of the load.

The high center of gravity of the load.

22 / 40

What should you do if the low air pressure warning comes on for only one system in a truck or bus that has a dual air brake system?

continue on with your trip

stop and safely park your vehicle only continue once the issue has been resolved

decrease your speed and head to the closest mechanic

decrease your speed and test the other system

23 / 40

Select the definition of "off-tracking."

it is wheen the rear wheel skid and the front wheels maintain a straight path

none of the answers listed

it is when the trailer wheels go in a different direction from the front wheels

it is when the rear wheels of the vehicle follow a different path way than that of the front wheels

24 / 40

You should____when an emergency requires you to quickly stop due to a crash.

use stab or controlled braking

use only the engine brakes

maintain pressure on the brake pedal

use the hand valve

25 / 40

Which of the following is the proper definition of a cargo tank?

A bulk container which can be securely affixed to a vehicle.

None of these answers are correct.

A bulk container not permanently attached to a vehicle.

A bulk container permanently attached to a vehicle.

26 / 40

_____ create a little above 90 degree angle between the adjuster arm and push rod when the brakes are released and no less than 90 degrees when the brakes are applied.

brake drums

air lines

brake disc

slack adjusters

27 / 40

If you are transporting cargo, you should inspect the cargo and securing devices:

before the trip, within 50 miles after beginning the trip, and at least every 150 miles or 3 hours

during every driving brake on the trip

within the first 50 miles of driving

before the trip

28 / 40

Which of the following are possible causes of tire fires?

poor cargo ventilation or short circuits

improperly loaded cargo and dual tires that touch

loose fuel connections or under-inflated tires

dual tires that touch and under-inflated tires

29 / 40

When driving a combination vehicle, the trailer breaks away severing the air lines. The trailer brakes should come on and ____.

the tractor will gain air pressure

the tractor to lose all air pressure in the tanks

the trailer supply valve will remain open

the tractor protection valve will close

30 / 40

Select the true statement about dual air brake systems:

they have a single set of air tanks and hoses

they are required to have two warning alarms

they require less time to build up air pressure

they have one set of controls for two air brake systems

31 / 40

The two main things to look ahead for while driving are _____.

truck stops and police

bridges and tunnels

fire and flooding

traffic and road conditions

32 / 40

Select the true statement:

a bobtail tractor will take longer to stop than a combination vehicle that is loaded to the max

you should always ride the brakes

light vehicles require more braking power than heavier vehicles

wait to brake heavy vehicles for as long as you can

33 / 40

With the engine cut off and the brakes released the air loss in a straight truck or bus should not be more than:

2 psi in a minute

4 psi in a minute

3 psi in a minute

5 psi in a minute

34 / 40

How can you determine if your vehicle is equipped with ABS?

check if your vehicle was manufactured after March 1, 1998 (they are required to have the panel light)

look for wheel speed sensor wires that are coming from the rear of your brakes

check for yellow abs malfunction lamps on the instrument panel

all of these answers are correct

35 / 40

Select which is not a mandatory emergency equipment:

A rated and properly charged fire extinguisher.

Extra electrical fuses.

Tire changing equipment.

6 fuses, 3 red reflective triangles, or 3 liquid burning flares.

36 / 40

What are spring brakes?

they are big springs with air pressure in them if the air pressure decreases, the brakes are applied

they are large springs that are held closed by air pressure if the air pressure is increased the brakes are applied

they are powerful springs that are restrained by air pressure when the air pressure is removed, the brakes are applied

none of the answers listed

37 / 40

The reason a bulk liquid tanker is hard to handle is:

Because of the high friction point.

Because the cargo has a low center of gravity.

Because the cargo has a high center of gravity.

Because the cargo has a high density.

38 / 40

Select the answer that is not a part of the braking process when driving a tractor-trailer combination vehicle that has ABS:

only use the braking that is necessary to safely stay in control of the vehicle

you should monitor the tractor and trailer as you decrease your speed to keep control

you should drive at a higher speed to keep the trailer in line

you should brake in the same manner regardless of what you are driving

39 / 40

A disruptive passenger:

Should not be discharged where it would be unsafe for them.

May be thrown off the bus.

Is not your responsibility.

Should not be allowed on the bus.

40 / 40

You downshift automatic transmissions ______.

at the bottom of a hill

half way down a hill

before going down a hill

none of these answers are correct

Your score is

The average score is 65%

3.6/5 - (5 votes)

CDL Category Practice Tests

CDL Practice Test

How To Get A new jersey Commercial Drivers License

To be eligible for a CDL in New Jersey, applicants must be at least 18 years old to operate within state lines and must be at least 21 to drive a commercial vehicle across state lines. To be eligible to drive a commercial vehicle in New Jersey, applicants must provide verification that they are medically fit to operate a commercial vehicle. New Jersey applicants must pass a vision test and have 20/40 vision in each eye.

All applicants must submit the following documents when they apply for a CDL.

(Form MCSA-5876) Medical Examiner’s Certificate
CDL Holder Self-Certification Form

Drivers who have had their licenses revoked, suspended, denied or canceled are not eligible for a CDL in New Jersey. Applicants must possess a basic New Jersey Class D driver’s license.

New Jersey CDL Endorsements

H – Hazmat Vehicles
N – Tank Vehicles
P – Passenger Vehicles
S – School Bus
T – Towing a Double or Triple Trailer

Hit the Open Road

new jersey CDL License Test Tips

Every New Jersey CDL applicant must pass the general knowledge test prior to taking the skills test. This test consists of 50 questions. To pass the New Jersey test, applicants must score 80 percent or higher. There are additional tests for applicants who want to drive specialized commercial vehicles. The New Jersey skills test can be taken 20 days after applicants pass the knowledge test. It includes a pre-trip vehicle inspection, basic control skills and on-road driving. Applicants must pass each section.

Military veterans who were discharged within 12 months of completing the CDL application and active military members can have the skills exam waived if they meet the requirements. To qualify for a waiver, applicants must show proof of military enlistment or discharge or have operated a motor vehicle equivalent to a commercial motor vehicle in the military within 12 months of the application date. In addition, applicants must possess a valid New Jersey driver’s license and submit an application for a Military Skills Test Waiver that is signed by the commanding officer.

Additional Information

Information on the New Jersey Motor Vehicle Commission

The New Jersey Motor Vehicle Commission provides oversight for the CDL license requirements in New Jersey. To get more information contact them via:

Website: https://www.state.nj.us/mvc/drivertopics/cdl.htm

Phone: 609.292.6500

Additional New Jersey CDL Helpful Links

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

new jersey CDL Practice Test

CDL Category Practice Tests

CDL Practice Test

How To Get A new jersey Commercial Drivers License

Hit the Open Road

new jersey CDL License Test Tips

Additional Information

Information on the New Jersey Motor Vehicle Commission

Additional New Jersey CDL Helpful Links

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CDL Practice Test