Air Brakes #2
Air Brakes Endorsement Test | New Jersey 2025 #2 Page 4 of 4
Train for FREE online with our New Jersey CDL air brake 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 Class A/Class B driver license 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 the requirements for CDL may vary from state to state.
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19 . Air brakes are:
A tool to improve fuel efficiency.
As long as the brakes are properly maintained, using air brakes is a safe and effective method of stopping large, heavy vehicles.
20 . When the brake pedal is pushed down, air brakes work:
Only if it is warm outside.
Because air takes time to flow through the air lines to the brakes, air brakes cannot begin working instantly. There is often a brake lag of at least one-half of a second between the moment the brake pedal is pressed and the moment the brakes begin to work.
21 . Anti-Lock Braking Systems (ABS):
Are illegal in some states.
ABS is equipped in addition to a vehicle's normal braking system and it neither increases nor decreases the vehicle's braking capability. ABS activates during hard applications of the brake pedal in order to prevent wheels from locking up.
22 . Front wheel braking works:
Under most conditions.
Front wheel braking is effective under all road conditions. It is unlikely that you will experience a front wheel skid, even on ice.
23 . In a newer vehicle, you apply the parking brake:
By using a black round knob.
In a newer vehicle with air brakes, the parking brake is controlled by a diamond-shaped yellow knob. The knob is pulled out to apply the parking brakes and pushed in to release them.
24 . Foundation brakes are used:
At each wheel.
Foundation brakes are used at each wheel. The most common type is the S-cam drum brake.
25 . What can happen if parking brakes are used in very wet weather with temperatures below freezing?
The brakes may become too smooth to be used.
Parking brakes should not be used in very wet weather when temperatures are below freezing. The brakes could become frozen in place, making it impossible to move the vehicle.
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.