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Double Triple Test | Pennsylvania 2025 #1 Page 3 of 3
Train for FREE with our Pennsylvania CDL double triple practice test online. 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 CDL double triple 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 DMV requirements may vary from state to state.
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15 . In a double or triple combination:
The weight of the trailers does not matter.
In a double or triple, the more heavily-loaded trailer should be immediately behind the tractor.
16 . Which part of a combination vehicle is the most likely to turn over?
The last trailer
The "crack-the-whip" effect makes the last trailer in a combination the most likely to turn over. Be especially careful when operating a double or triple combination vehicle around a turn or corner.
17 . What happens when you push in the trailer air supply control knob?
Air brakes are applied.
To send air to the emergency (supply) lines, a driver can push in the trailer air supply control knob. The knob is red and eight-sided.
18 . What happens if, after connecting a trailer, there is no air pressure in the trailer brakes?
Alternative brakes must be used.
After coupling trailers, be sure to check the air brakes. If air does not flow all the way to the back each brake line, the brakes will not work.
19 . Due to the "crack-the-whip" effect:
Vehicles following a truck will be able to travel faster than normal.
Double and triple trailer combinations are more likely to turn over due to the "crack-the-whip" effect than are other combination vehicles. Drivers should be aware of the rearward amplification of their specific vehicles and steer accordingly.
20 . When driving a double or triple, it is important to remember that:
The vehicle can easily fit into small spaces.
Doubles and triples need more space than other vehicles, both because they are longer than other vehicles and because their size and weight prevent them from turning or stopping suddenly. When driving a double or triple, always make sure you have enough space before entering traffic, crossing traffic, or changing lanes.
2025 Pennsylvania | Frequently Asked Questions
A CDL Class B license in Pennsylvania allows the holder to operate single vehicles with a gross vehicle weight rating (GVWR) of 26,001 pounds or more, or any such vehicle towing another not exceeding 10,000 pounds GVWR. This includes buses, farm labor vehicles, dump trucks, delivery trucks, and utility vehicles.
With a Class B CDL license in Pennsylvania, you can operate single vehicles like buses, dump trucks, tow trucks, delivery trucks, and garbage trucks. These vehicles have a gross vehicle weight rating (GVWR) of 26,001 pounds or more, or they may be towing another vehicle not exceeding 10,000 pounds GVWR.
In Pennsylvania, to acquire a Class B CDL license, you must be at least 18 years old (21 for interstate driving), hold a valid Pennsylvania driver's license, pass a vision test, and successfully complete a knowledge test. You'll also need a medical examiner's certificate, proving you're physically fit for the job. Lastly, you'll need to pass a road skills test in a Class B vehicle.
In Pennsylvania, you must be at least 18 years old to qualify for a Class B CDL license for intrastate driving (within state lines). However, to drive a commercial vehicle across state lines (interstate driving), you must be at least 21 years old.
While not always necessary, specific endorsements may be required for certain types of Class B CDL driving in Pennsylvania. These endorsements, such as passenger, school bus, or hazardous materials, require additional knowledge tests. Having these endorsements can broaden your job opportunities as a commercial driver.
The Class B CDL skills assessment in Pennsylvania includes three parts: a pre-trip inspection test, a basic vehicle control test, and an on-road driving test. The pre-trip inspection tests your knowledge about your vehicle and its safety. The basic vehicle control test assesses your ability to maneuver and control the vehicle. The on-road driving test evaluates your driving skills in various traffic situations.
Class B CDL license holders in Pennsylvania are limited to operating vehicles with a Gross Vehicle Weight Rating (GVWR) over 26,000 pounds or towing a vehicle not exceeding 10,000 pounds. They cannot operate Class A vehicles unless they have the appropriate endorsements. Additionally, interstate drivers must be at least 21 years old.
Yes, it is possible to take the written Class B CDL test in languages other than English in Pennsylvania. The Pennsylvania Department of Transportation provides the test in several languages. However, a basic understanding of English is required, as federal regulations mandate that all CDL holders understand English to a degree necessary to operate their vehicle safely.
Yes, you can request test accommodations for the Class B CDL written exam in Pennsylvania due to a disability. The Pennsylvania Department of Transportation provides accommodations under the Americans with Disabilities Act. These may include extended time, a separate testing room, or use of assistive technology. Contact PennDOT directly to discuss your specific needs.
If you don't pass the Class B CDL written test in Pennsylvania, you can retake it. However, you must wait at least 3 days before retesting. There is also a retest fee each time you take the test. It's recommended to study thoroughly and use the available practice tests to increase your chances of passing on your next attempt.