Florida CDL Combination Practice Test (FL) 2

4.9 out of 5 (117 votes)
80% Passing score
20 Questions
4 Mistakes allowed
Preparing for your Commercial Driver's License (CDL) in Florida? Our Florida CDL combination practice test is designed to help you ace the test with confidence. This particular test, the second in our comprehensive series of CDL practice tests, covers essential topics like inspection procedures, safe driving practices, air brake systems, and more. Featuring 20 multiple-choice questions, it provides a thorough review of the material you'll need to master for the official permit test. To pass, you'll need to correctly answer at least 16 questions, which will significantly boost your confidence and ensure you're well-prepared for the test. Florida's unique driving conditions present a variety of challenges, from navigating the bustling urban streets of Miami to dealing with the unpredictable weather along the Gulf Coast. Whether you're driving through the heavy traffic of Orlando or handling a long haul down the straight, flat highways of the Panhandle, our Florida combination vehicle test will help you develop the skills needed to manage these diverse environments safely. One critical aspect covered in this CDL combination test is understanding the risks of jackknifing. This dangerous situation occurs when the trailer swings out of alignment with the tractor, often due to abrupt braking or handling. By practicing smooth braking and careful handling through our test, you'll learn how to avoid such risks effectively. Our Florida permit test practice complements any state-certified driver's ed or Entry-Level Driver Training (ELDT) course, offering a valuable addition to your preparation toolkit. The variety of questions available in our DMV practice test ensures a comprehensive review, covering all necessary aspects to give you a thorough understanding. Plus, since this is a Florida permit practice test, it provides a stress-free learning environment, allowing you to focus on learning without the pressure of passing the official written test. Get ready to tackle the roads with confidence. By integrating our combination CDL practice test into your study routine, you'll not only pass the permit test but also become a safer, more knowledgeable driver ready for Florida's roads.
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Sample Florida Combination Test Questions

Question 1

Which action can damage a semitrailer’s landing gear during uncoupling?

  1. A Keeping the tractor aligned with the trailer
  2. B Supporting the trailer on a firm surface
  3. C Pulling the tractor out at an angle
  4. D Checking the area before moving

Correct answer: C – Pulling the tractor out at an angle

The tractor should be lined up with the trailer before it is pulled from underneath. Pulling out at an angle can place sideways force on the trailer and damage the landing gear. The parking surface must also be able to support the trailer’s weight before uncoupling begins.

Source: Florida Commercial Driver’s License Manual — § 6.4.2, “Uncoupling Tractor-Semitrailers”

Question 2

Which procedure is used to test the tractor protection valve?

  1. A Open both shut-off valves at the rear of the last trailer
  2. B Release the parking brakes and quickly pull forward
  3. C Charge the system, shut off the engine, and repeatedly press and release the brake pedal
  4. D Manually place the trailer air-supply control in the emergency position

Correct answer: C – Charge the system, shut off the engine, and repeatedly press and release the brake pedal

Florida’s CDL manual instructs the driver to charge the trailer air system, shut off the engine, and press and release the brake pedal to lower tank pressure. The trailer air-supply control should pop out or move to emergency at the manufacturer’s specified pressure, usually within 20 to 45 psi. Manually moving the control does not test its automatic operation.

Source: Florida Commercial Driver’s License Manual — § 6.5.2, “Combination Vehicle Brake Check”

Question 3

If locked trailer wheels cause the trailer to begin swinging sideways, what should you do first?

  1. A Apply the trailer hand valve harder
  2. B Accelerate immediately
  3. C Steer sharply in the opposite direction
  4. D Release the brakes to restore traction

Correct answer: D – Release the brakes to restore traction

Release the brakes to allow the locked trailer wheels to regain traction. Do not use the trailer hand valve to straighten the combination because additional trailer braking can keep the wheels locked. Once the trailer tires grip the road again, the trailer should begin following the tractor and straighten out.

Source: Florida Commercial Driver’s License Manual — § 6.1.5, “Prevent Trailer Skids”

Question 4

Why must the air lines be properly supported while the tractor is backing under a trailer?

  1. A To keep the lines from being crushed or caught
  2. B To improve the tractor’s fuel economy
  3. C To reduce wear on the trailer tires
  4. D To raise the trailer to coupling height

Correct answer: A – To keep the lines from being crushed or caught

The coupling procedure requires the air lines to be routed and supported where they will not be crushed or caught while the tractor backs under the trailer. The driver should also inspect the lines for damage and connect the correct service and emergency glad hands. Proper support protects the hoses during coupling.

Source: Florida Commercial Driver’s License Manual — § 6.4.1, “Coupling Tractor-Semitrailers”

Question 5

What is the first listed step when coupling a tractor to a semitrailer?

  1. A Connect the trailer air lines
  2. B Inspect the fifth wheel
  3. C Back beneath the trailer
  4. D Raise the landing gear

Correct answer: B – Inspect the fifth wheel

The first step is to inspect the fifth wheel for damaged or missing parts and verify that it is securely mounted. The plate should be lubricated as required and positioned for coupling, with the jaws open. The trailer’s kingpin must also be checked for damage before backing under the trailer.

Source: Florida Commercial Driver’s License Manual — § 6.4.1, “Coupling Tractor-Semitrailers”

Question 6

How should the tractor be positioned before you back under a semitrailer?

  1. A Slightly angled toward the passenger side
  2. B Offset so one locking jaw engages first
  3. C Approximately 20 degrees from the trailer
  4. D Directly in front of and aligned with the trailer

Correct answer: D – Directly in front of and aligned with the trailer

Place the tractor directly in front of the trailer and use both outside mirrors to check alignment. Backing under at an angle can push the trailer sideways and damage or break the landing gear. The kingpin and fifth wheel should be properly aligned before the tractor moves beneath the trailer.

Source: Florida Commercial Driver’s License Manual — § 6.4.1, “Coupling Tractor-Semitrailers”

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