Air Brakes #2
Air Brakes Endorsement Test | Pennsylvania 2025 #2 Page 3 of 4
Train for FREE online with our Pennsylvania 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 PA 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.
25
20
20
13 . To stop in a vehicle that uses air brakes, the driver should:
Pull the brake pedal up.
To make a normal stop in a vehicle with air brakes, push the brake pedal down. The harder the pedal is pressed, the more air pressure is released.
14 . Where is the safety relief valve usually located?
On the dashboard
An air brake system's safety relief valve is located in the tank that is first to receive air from the compressor.
15 . Vehicles with dual air brake systems:
Do not need time to build air pressure before a trip.
Before driving a vehicle with a dual air brake system, you must allow the air compressor time to build up at least 100 psi of air pressure in both the primary and secondary systems.
16 . 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.
17 . If the air pressure warning light comes on, you should:
Safely exit the roadway and stop.
If the air pressure warning light or buzzer comes on while you are driving, you should immediately stop and safely park the vehicle. This warning signal indicates that there is a problem in the air brake system that needs to be fixed.
18 . What can happen if the air pressure gets too low in an air brake system?
The brakes will be very sensitive.
Pressing and releasing the brake pedal unnecessarily can let air out faster than the compressor can replace it, reducing the available air pressure. If the air pressure in an air brake system gets too low, the brakes will no longer work.
See the exact questions that will be on the 2025 Pennsylvania DMV exam.
99.2% of people who use the cheat sheet pass the FIRST TIME
Lillian MCcranie explains how our CDL study guide was helpful in passing the exam and recommends it to everyone.
Cameron tells us how he purchased the CDL exam, and found it to be a useful tool which helped him pass the exam and find a job.
2025 Pennsylvania | Frequently Asked Questions
To secure a CDL Doubles/Triples endorsement in Pennsylvania, you must first have a Commercial Driver's License (CDL). Then, you'll need to pass the Doubles/Triples endorsement knowledge test. Study the CDL manual, particularly the section on Doubles/Triples. After passing, the endorsement will be added to your CDL. Remember, driving experience with these types of vehicles is recommended but not required.
To obtain a CDL Doubles/Triples license, you first need a Commercial Driver's License (CDL). Next, study the relevant sections of your state's CDL manual to prepare for the Doubles/Triples endorsement knowledge test. Once you pass this test, the endorsement will be added to your CDL. It's important to note that while experience driving these vehicles is beneficial, it's not required.
Specialized experience or training is not required for a CDL Doubles/Triples endorsement. However, it's beneficial to familiarize yourself with these types of vehicles. The key requirement is passing the Doubles/Triples endorsement knowledge test. Thoroughly studying the relevant sections of your state's CDL manual will help you prepare for this test. Once passed, the endorsement is added to your CDL.
Yes, an extra written test is mandatory to obtain a CDL Doubles/Triples endorsement in Pennsylvania. You will need to study the relevant sections of the Pennsylvania CDL manual and pass the Doubles/Triples endorsement knowledge test. Upon passing, the endorsement will be added to your existing Commercial Driver's License.
For the CDL Doubles/Triples endorsement in Pennsylvania, you do not need to showcase specific skills or maneuvers during a practical exam. Instead, you must pass a written knowledge test. This test primarily focuses on coupling and uncoupling, inspecting doubles and triples, and checking air brake systems. There is no practical skills test involved.
No, it's not permissible. In Pennsylvania, like all other states, you must have a valid CDL with a Doubles/Triples endorsement to legally operate double or triple trailers. Driving such vehicles without the appropriate endorsement can result in serious penalties, including fines, suspension of your CDL, or even jail time in some cases.
You can append the CDL Doubles/Triples endorsement to your current commercial driver's license. You do not need to initiate a new application for a separate license. However, you must pass the specific written knowledge test for this endorsement. Once passed, the Pennsylvania Department of Transportation will add the endorsement to your existing CDL.
Drivers holding a CDL Doubles/Triples endorsement in Pennsylvania must adhere to specific rules. For instance, they cannot exceed the maximum length of 100 feet for their vehicles. Additionally, they must be familiar with coupling and uncoupling procedures, as well as inspecting doubles and triples. Also, violation of traffic rules can lead to the suspension or revocation of the endorsement.
In Pennsylvania, the maximum legal weight for a vehicle is 80,000 pounds. The maximum length for a single trailer is 53 feet, while the combined length of a double/triple trailer cannot exceed 28 feet per trailer. However, these limits can vary depending on the type of road and specific local regulations. Always check with local authorities for exact restrictions.
Yes, in Pennsylvania, drivers with a CDL Doubles/Triples endorsement must follow specific safety guidelines. They should know how to couple and uncouple correctly, inspect doubles and triples, and handle emergency situations. They must also understand the dangers of "crack-the-whip" effects and prevent rollovers. Drivers should maintain safe following distances and adjust for added length and weight of the vehicle.
