Air Brakes #2
Air Brakes Endorsement Test | Pennsylvania 2026 #2
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 2026, 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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1 . What happens if the air pressure in a system's air tanks falls below 60 psi?
The vehicle should stop.
In an air brake system, a low pressure warning signal should activate if the pressure in the air tanks falls to a level below 60 psi. This signal may be in the form of a warning light or a wig wag.
2 . What does the air compressor governor do?
Controls the temperature of the air leaving the air storage tanks.
In an air brake system, the air compressor governor controls when the air compressor pumps air into the air storage tanks.
3 . When only the tractor is equipped with an Anti-Lock Braking System (ABS):
The brakes will become more sensitive.
If a tractor is equipped with an Anti-Lock Braking System (ABS) but the trailer is not, the risk of jackknifing will be reduced and the driver should still be able to maintain steering control. If only the trailer is equipped with ABS, it is less likely that the trailer will swing out to one side.
4 . Service brakes should:
Before driving, you should always verify that your service brakes are in good working order. Testing the brakes before a trip allows you to locate any problems before you need to brake while on the road.
5 . In cold weather, an alcohol evaporator should be checked and filled:
Once a month.
An alcohol evaporator can help prevent ice from building up in an air brake system. In cold weather, the evaporator should be checked and refilled every day.
6 . What kind of force must emergency brakes use?
Electrical
Because air pressure can eventually leak away, the emergency brakes in an air brake system must be held on by mechanical force.
2026 Pennsylvania | Frequently Asked Questions
To acquire a CDL Passenger endorsement in Pennsylvania, you must first have a Commercial Driver's License (CDL). Next, you will need to pass a written passenger endorsement test and a skills test in the type of vehicle you will be driving. The Pennsylvania Department of Transportation (PennDOT) regulates this process.
To obtain a CDL Passenger license in Pennsylvania, you must be at least 21 years old, possess a valid Pennsylvania driver's license, pass a DOT physical examination, and complete a CDL training course. Afterward, you must pass the written knowledge test and the skills test which includes pre-trip vehicle inspection, basic vehicle control, and on-road driving.
Yes, specific training and experience are required to obtain a CDL Passenger endorsement in Pennsylvania. You must first hold a valid CDL and pass a written knowledge test for the Passenger endorsement. Additionally, you will need to complete a skills test that includes a pre-trip inspection, basic vehicle control, and an on-road driving test in a passenger vehicle.
Yes, to secure a CDL Passenger endorsement in Pennsylvania, you must pass a written passenger endorsement test. This test covers topics such as vehicle inspection, loading and trip start, on the road, after-trip vehicle inspection, prohibited practices, and use of brake-door interlocks. This is in addition to the standard CDL exams.
During the CDL Passenger endorsement assessment in Pennsylvania, you'll need to demonstrate your ability to conduct pre-trip vehicle inspections, manage safe loading and unloading of passengers, use brake-door interlocks correctly, execute safe driving practices on the road, and perform after-trip vehicle inspections. The skills test includes vehicle control and on-road driving.
No, you cannot legally transport passengers in Pennsylvania without a valid CDL Passenger endorsement. This endorsement is required for drivers who wish to drive a vehicle designed to carry 16 or more passengers, including the driver. Driving without the proper endorsement can lead to heavy fines and potential loss of your CDL.
To add a CDL Passenger endorsement to your existing license in Pennsylvania, you will need to complete a new application and pay the necessary fees. You cannot simply add the endorsement to your current license without going through the application process. This ensures that you meet all the requirements and have the necessary qualifications for operating passenger vehicles.
Yes, there are specific restrictions for drivers with a CDL Passenger endorsement in Pennsylvania. For instance, drivers must not have a record of serious traffic violations or criminal offenses. They must also pass a physical examination every two years, and must not consume alcohol or use controlled substances while on duty. Violations can lead to suspension, revocation, or disqualification of the CDL.
Yes, in Pennsylvania, to obtain a CDL Passenger endorsement, you must be at least 21 years old. This age requirement is due to federal regulations which stipulate that all commercial drivers operating a commercial vehicle across state lines must be at least 21. There's no upper age limit as long as you can pass the necessary physical examinations.
With a CDL Passenger endorsement in Pennsylvania, you will be eligible to operate vehicles such as buses, shuttles, and any other vehicles designed to carry 16 or more passengers, including the driver. This endorsement is necessary for jobs like school or city bus driving, and for commercial transport like shuttle services.