Knowledge Test Class B #2
Class B Driving Test | New Jersey 2025 #2 Page 5 of 7
Train for FREE online with our New Jersey class B license test. The official exam test consists of several obligatory parts, with all of them checking your knowledge of different blocks of road rules. If you need to obtain a NJ CDL class B permit in 2025, practice as much as possible. Free sample tests published on our website will help you check and improve your knowledge and boost your grades. Please bear in mind that CDL class B requirements may vary from state to state.
50
40
20
29 . When doing an inspection, make sure your brake pads are:
Free of oil and grease.
Potential problems to check for when inspecting brakes include cracked drums; shoes or pads with oil, grease, or brake fluid on them; and shoes that are missing, broken, or worn dangerously thin.
30 . While driving downhill, you should brake until you reach a speed that is ____ below your safe speed, then release the brake pedal.
20 mph
While driving downhill, you should hold down the brake pedal until your vehicle reaches a speed 5 mph below your safe speed, then release the brake pedal. Repeat this process.
31 . If stopped on the side of the road, how should you alert other motorists?
Keep the driver's side door open.
If you must stop on the side of the road, it is important to turn on your four-way emergency flashers to warn other road users.
32 . Tires of mismatched sizes:
Should not be used on a vehicle.
Having tires of mismatched sizes on a vehicle is a problem that should be fixed if discovered during a vehicle inspection.
33 . If caught driving without an active license, you will:
Lose your license for at least 60 days.
A first conviction of driving a commercial motor vehicle while your CDL is suspended, revoked, canceled, or disqualified will result in the loss of your license for at least one year.
34 . You may be denied a HazMat endorsement if:
You do not suffer from a mental illness.
You will be denied a HazMat endorsement, or lose an existing endorsement, if you are not a lawful permanent U.S. resident; you renounce your U.S. citizenship; you are wanted for, under indictment for, or convicted of certain felonies; you are judged as mentally unstable or are committed to a mental institution; or you are deemed to pose a security threat by the Transportation Security Administration (TSA).
35 . A low air pressure warning signal should activate:
When tank pressure falls below 5 psi.
In an air brake system, a low air pressure warning signal must come on if air pressure in the tanks falls below 60 psi. This warning signal may come in the form of a light, a buzzer, or a wig wag.
2025 New Jersey | Frequently Asked Questions
In New Jersey, to secure a CDL Doubles/Triples endorsement, you must already have a valid CDL. You'll need to pass a knowledge test specific to driving double and triple trailers. This test covers topics like coupling and uncoupling, inspecting doubles and triples, and handling these vehicles. After passing the test, the endorsement will be added to your CDL.
To obtain a CDL Doubles/Triples license, you must first have a Commercial Driver's License (CDL). You'll then need to pass a knowledge test specific to driving double and triple trailers. This test covers topics like coupling and uncoupling, inspecting doubles and triples, and handling. After you successfully pass the test, the endorsement is added to your CDL.
While New Jersey doesn't require specific training for a CDL Doubles/Triples endorsement, it's recommended to get some practice. You must pass a knowledge test on handling these types of vehicles. Studying the CDL manual and taking practice tests can help. Some choose professional driver training schools to gain practical experience before the test.
Yes, to obtain a CDL Doubles/Triples endorsement in New Jersey, you must pass a knowledge test specific to driving double and triple trailers. The test covers topics such as coupling and uncoupling, inspecting doubles and triples, and handling. This is in addition to the general CDL written exam.
For the CDL Doubles/Triples endorsement in New Jersey, you don't have to perform a specific skills or driving test. The endorsement requires only a knowledge test. However, general skills like safe coupling and uncoupling, maintaining vehicle balance, and understanding the high rollover risk are crucial when operating these vehicles. Always refer to your state's CDL manual for complete information.
No, it's not permissible. In New Jersey, and across the U.S., driving double or triple trailers requires a Commercial Driver's License (CDL) with a Doubles/Triples endorsement. Operating these vehicles without the appropriate endorsement is illegal and can result in significant fines, penalties, and potentially loss of your CDL.
Yes, you can append the Doubles/Triples endorsement to your existing CDL. You don't need to initiate a new application for a CDL. However, you will need to pass the Doubles/Triples endorsement knowledge test and pay the required fee to add it to your current CDL in New Jersey.
Yes, there are limitations for drivers with a CDL Doubles/Triples endorsement. These include restrictions on the maximum length of trailers, adherence to specific coupling and uncoupling procedures, and understanding the handling characteristics of double/triple trailers. Violations can result in fines, penalties, or suspension of the endorsement or CDL.
In New Jersey, the maximum legal weight for a vehicle is 80,000 pounds, and the maximum length for a two-trailer combination is 58 feet. For a three-trailer combination, the maximum length is 65 feet. These limits can be exceeded only with special permits and under certain conditions. Always check specific regulations as they can vary.
Yes, there are specific safety guidelines for driving double/triple trailers. Drivers must ensure proper coupling and uncoupling of units, maintain safe following distance, and understand the high rollover risk. They should also be aware of the special considerations for longer combination vehicles, like the impact of "crack-the-whip" effects on stability and control.