Combination #1
Combination Vehicles Practice Test | Florida 2025 #1 Page 2 of 3
Train for FREE online with our Florida CDL combination vehicle 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 FL combination 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 for issuing a combination license may vary from state to state.
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8 . The emergency air line:
Prevents skids.
The emergency air line (also known as the supply line) has two functions. The first is to supply air to the trailer air tanks on a combination vehicle, and the second is to control the emergency brakes.
9 . What happens when the wheels of a trailer lock up?
The trailer will stop.
A trailer tends to swing around, potentially resulting in a trailer jackknife, if its wheels lock up.
10 . Starting in which year were newly manufactured trailers required to have ABS?
2004
All trailers and converter dollies manufactured on or after March 1, 1998 must be equipped with Anti-Lock Braking Systems (ABS).
11 . A tractor protection valve is:
A device that allows the battery to recharge efficiently.
On combination vehicles with air brakes, the tractor protection valve keeps air in the tractor or truck brake system, should the trailer develop a bad leak or break away from the tractor.
12 . What is a tractor protection valve?
A valve that prevents the trailer from accidentally being released
In a combination vehicle with air brakes, the tractor protection valve keeps air in the tractor or truck brake system in the event of the trailer breaking away or developing a leak.
13 . Rollovers are most likely to happen when:
It is raining.
Rollovers happen when an operator turns too fast. Drivers should be sure to slow down before entering turns and curves, especially when transporting a fully-loaded rig.
14 . Air pressure in the ____ air line is controlled by either the foot brake or trailer hand brake.
Auxiliary
Air pressure in the service air line is controlled by either the foot brake or trailer hand brake. The service air line is also known as the control line or signal line. This line is connected to relay valves, which allow the trailer brakes to be applied more quickly than would otherwise be possible.
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2025 Florida | Frequently Asked Questions
In Florida, a Commercial Driver's License (CDL) Class B is a type of license required to operate vehicles with a Gross Vehicle Weight Rating (GVWR) of more than 26,000 pounds. It also allows the holder to tow vehicles that weigh less than 10,000 pounds. This includes buses, dump trucks, delivery trucks, and straight trucks.
A Class B CDL license in Florida 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 in excess of 10,000 pounds. This includes vehicles like city buses, tourist buses, segmented buses, delivery trucks, dump trucks, and utility trucks.
To acquire a Class B CDL license in Florida, an applicant must be at least 18 years old (21 for interstate driving), possess a valid Florida driver's license, pass a vision test, and successfully complete the General Knowledge test. Additionally, an applicant must pass the pre-trip, basic controls and road test for the desired vehicle. A medical examination report is also required.
In Florida, you must be at least 18 years old to qualify for a Class B Commercial Driver's License (CDL) for intrastate driving (within Florida only). However, you must be 21 years or older to qualify for interstate driving (across state lines or transporting hazardous materials).
Specific endorsements are not necessary for a Class B CDL license, but they can broaden your driving capabilities. Endorsements allow you to drive certain types of vehicles or transport specific goods. For example, a passenger or school bus endorsement allows you to drive large buses, while a hazardous materials endorsement allows you to transport hazardous materials.
The Class B CDL skills assessment in Florida includes three parts: a pre-trip inspection, a basic vehicle control test, and an on-road driving test. The pre-trip inspection tests your knowledge on vehicle safety, the basic vehicle control test checks your ability to maneuver the vehicle, and the on-road driving test assesses your practical driving skills in various traffic situations.
Yes, Class B CDL license holders in Florida are restricted to driving single vehicles with a gross vehicle weight rating (GVWR) of 26,001 pounds or more, or a towing vehicle not exceeding 10,000 pounds GVWR. They cannot operate Class A vehicles unless they upgrade their license. Also, without specific endorsements, they cannot transport passengers or hazardous materials.
In Florida, the written Class B CDL test is primarily offered in English. However, some locations may provide the test in Spanish. It's important to note that federal regulations require all commercial drivers to understand and read English well enough to converse with the general public, understand traffic signs and signals, respond to official inquiries, and make entries on reports and records.
Yes, you can request test accommodations for the Florida Class B CDL written exam if you have a disability. The Florida Department of Highway Safety and Motor Vehicles (DHSMV) complies with the Americans with Disabilities Act (ADA) and provides modifications or aids to help individuals with disabilities take the test. However, you must provide documentation supporting your need for accommodation.
If you don't pass the Class B CDL written test in Florida, you can retake it. However, you must wait until the next business day to do so. If you fail the test three times, you will need to complete a state-approved driver education course before attempting the test again. Keep in mind that each retest comes with an additional fee.
