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

A slack adjuster is:

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

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

a lever that connects the brake drum to the brake shoe

a lever that connects the brake camshaft with the brake chamber

2 / 40

Select the true statement in regards to driving a truck with triple or double trailers:

extra care should be taken when driving in bad weather and in the mountains

the truck requires increased following distance compared to smaller vehicles

all answers listed

the risk of trailer jackknifes and tipping is increased compared to shorter trucks

3 / 40

Select how you can tell if your vehicle is equipped with an anti-lock braking system:

the vehicle is manufactured after 1998

the vehicle is manufactured after 2005

the vehicle is manufactured after 1990

the vehicle is manufactured after 2001

4 / 40

When should you avoid using the parking brake?

when the brakes are hot

whenever you park

while on an incline

when the air pressure is low

5 / 40

Class A explosives must not be transported in a combination vehicle if the vehicle includes:

A placarded cargo tank.

A 200 inch wheelbase trailer.

None of these answers are correct.

Two or more trailers.

6 / 40

Select the definition for outage:

It is loss of power to the headlights.

It is the process of liquid expansion as it becomes warm.

It is the liquid that must be drained off to meet legal carry limit.

It is how much power is lost to the hydraulics.

7 / 40

What kind of surge can occur in a tank with baffles?

Bottom to top

Back to front

All answers listed

Side to side

8 / 40

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

signal when you are merging into traffic

signal when you want to change lanes

signal before you exit

signal just before you start to make a turn

9 / 40

How should you inspect a converter dolly?

as if it is cargo

as if it is an axle with a fifth wheel

as if it is an engine

as if it is a trailer

10 / 40

For emergency braking to avoid a crash when driving a double trailer you should:

use the trailer brakes only

none of the answers listed

slam down the brake pedal and keep pressure on it

do stab or controlled braking

11 / 40

Upon what does the amount of liquid you can carry in a load depend?

The amount of expansion that will occur.

All of the answers listed.

The legal weight limits.

The weight of it.

12 / 40

Your bus is disabled. With riders aboard, the bus may be towed or pushed to a safe place only:

By a 27,000 lbs gvwr or larger tow truck.

By another bus with its four-way flashers on.

If the distance is less than 500 yards.

If getting off the bus would be more risky for the riders.

13 / 40

When this item is missing or loose, movement may occur between the fifth wheel assembly and the frame.

Locking jaw

Lug nuts

Tandem release arm

Locking pins

14 / 40

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

The driver's seat only.

Window seats.

Any of the last row seats.

None of these answers are correct.

15 / 40

Select the true statement in regards to brake drums:

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

All of these answers are correct.

Hold the brake linings and shoes.

They are bolted to the wheels.

16 / 40

Select which is not an engine compartement belt:

A water pump belt

A power steering belt

An air compressor belt

A safety belt

17 / 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.

18 / 40

If the hazardous materials are classified as FORBIDDEN you should:

Remove the placards from the trailer.

Place the materials in the front of the trailer.

Take special caution in transporting the material.

Refuse the load.

19 / 40

When backing your vehicle, which of the following is NOT recommended

use the lowest reverse gear

back and turn towards the driver's side

back as slow as possible

back towards the right side

20 / 40

When would a drive-wheel skid result in a jackknife when pulling doubles?

when the tractor brakes lock up

when the trailer pushes the towed vehicle sideways

when the tractor spins around

when the trailer slides to the right into the shoulder

21 / 40

Select the true statement about retest markings:

It shows what type of inspection or test was completed.

Must have a date of the last retest marked.

All answers listed.

They must be stamped on the tank.

22 / 40

When driving on a clear night with the vehicle lights on, your speed should be such that you can stop within _____.

the length of half a football field

the distance you can see ahead of you

the distance you will travel in 10 seconds time

2 times the length of your vehicle

23 / 40

How do you test the trailer service brakes?

apply pressure to the brake pedal

release air to the spring brakes

apply the hand control and check to see if you feel the trailer brakes come on

test the brakes out while driving at 5 mph

24 / 40

Animals and human foodstuffs should not be loaded in the same vehicle with?

Flammable liquids

Flammable gases

Explosives

Poisons

25 / 40

Which trailer is most likely to tip over due to the crack the whip effect?

the heaviest trailer

the first trailer of a triples

the last trailer of a triple

the last trailer of a double

26 / 40

What is NOT one of the four skill areas that operating a commercial vehicle requires?

first aid certification

accelerating

safely backing

steering

27 / 40

What is the value of the overhead rear-view mirror inside of the bus?

To monitor passenger activity.

To check blind spots.

To provide visibility directly in the back of the bus.

To monitor the driver's appearance.

28 / 40

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

one

six

two

four

29 / 40

When driving in very hot temperatures, you should:

let your tires cool down (remain stopped) if they are too hot to touch

check your tires every 2 hours or every 100 miles

insure that you have enough antifreeze in the system

all of these answers are correct

30 / 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 100 feet.

At least 25 feet.

At least 50 feet.

At least 75 feet.

31 / 40

Mirrors with a convex surface or "spot" mirrors _____.

make things look farther away and smaller than they actually are

are illegal in most states

make things look closer and larger than they actually are

they show a larger area than flat mirrors so do not need to be checked as often

32 / 40

Before pulling away, make sure the landing gear of the trailer is:

Down and that the handle is secured.

Raised and that the handle is secured.

Raised and that the handle is hanging free.

Down and that the handle is hanging free.

33 / 40

When driving with multiple trailers, which one should be right behind the tractor?

the trailer longest in length

the trailer with the smallest road

the trailers shortest in length

the trailer with the heaviest load

34 / 40

The main reason you should pull the dolly out from under a trailer before disconnecting it from the trailer in front is:

removing the dolly before uncoupling is not the correct procedure

it is possible that the dolly tow bar could fly up making it difficult to re-couple

to provide additional lateral stabilization to the front trailer

so the rear-trailer's air brake system will stay charged and keep the trailer wheels locked to prevent rolling

35 / 40

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

on service air lines

on emergency and service air lines

on parking brake lines

on emergency air lines

36 / 40

Air pressure should build___with a dual air system.

from 70 to 125 psi in 60 seconds

from 85 to 100 psi in 45 seconds

from 60 to 100 psi in 45 seconds

from 50 to 80 psi in 60 seconds

37 / 40

This object should be clean with no obstructions, illegal stickers or damage to the glass.

The side mirrors

The headlights

The windshield

The lighting indicators

38 / 40

A placarded vehicle must have at least ___ placards?

six

four

three

two

39 / 40

What is the standee line?

A line around each seat to help each passenger have a little personal space.

A line at the back of the bus where passengers must stand before exiting.

A 2 inch line down the aisle to help keep passenger traffic flowing.

A 2 inch line on the floor that all passengers must stay behind.

40 / 40

Tires should should be replaced:

if the tread depth on your front tires is less than 4/32 deep

when there are broken valve stems

all of these answers are correct

when the tread separates

Your score is

The average score is 77%

3.7/5 - (4 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