Mississippi CDL Combination Test (MS) 2026

5 out of 5 (35 votes)
80% Passing score
20 Questions
4 Mistakes allowed
Getting your CDL combination vehicles endorsement in Mississippi just got easier with our comprehensive MS combination CDL practice test. This is the first of many Mississippi drivers license practice tests we offer, designed to help you ace the test with confidence. Our CDL combination practice test is packed with a variety of multiple-choice questions covering all critical areas, including coupling and uncoupling procedures, pre-trip inspections, effective driving techniques, backing and maneuvering, and understanding air brake systems. Each Mississippi permit test practice consists of 20 well-structured questions, and you need to answer at least 16 correctly to pass. By engaging with these questions, you'll dive deep into essential topics like the increased stopping distances required for combination vehicles due to their greater weight. This knowledge is vital for maintaining road safety and handling the unique challenges presented by these larger, heavier vehicles. Our Mississippi combination CDL practice test stands out by incorporating visual learning aids. Many of the sample questions on our Mississippi drivers license practice test come with images to help you better understand the scenarios presented. This feature is particularly beneficial for visual learners who can grasp concepts more effectively through visual stimuli. Furthermore, this MS practice permit test provides a no-pressure learning environment. Unlike the actual written permit test where the pressure to pass can be overwhelming, our Mississippi permit test practice allows you to learn at your own pace, in a stress-free setting. This enables you to absorb the material thoroughly without the anxiety that often accompanies formal testing. One of the most valuable aspects of our DMV practice test is the immediate feedback and explanations provided for each question. As you navigate through the Mississippi combination CDL test, you will receive detailed explanations for your answers, whether correct or incorrect. This immediate feedback helps reinforce your learning, ensuring that you understand the reasoning behind each answer, which is crucial for your success on the actual test. Prepare confidently for your CDL combination vehicles endorsement with our Mississippi combination CDL practice test. Gain the knowledge, skills, and confidence you need to excel and drive safely on the road.
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Sample Mississippi Combination Test Questions

Question 1

After coupling a tractor-semitrailer, what gap should be visible between the trailer apron and fifth-wheel plate?

  1. A About 1 to 2 inches
  2. B About 2 to 5 inches
  3. C At least 5 inches
  4. D No visible gap

Correct answer: D – No visible gap

The Mississippi CDL manual requires the trailer to lie flat on the fifth-wheel skid plate with no visible space between the upper and lower fifth wheel. A gap can indicate that the kingpin is resting on top of the closed jaws instead of being captured correctly. The jaws must close around the kingpin’s shank.

Source: Mississippi Commercial Driver’s License Manual (March 2025) — § 6.4.1, “Coupling Tractor-Semitrailers”

Question 2

Which action directly checks whether the trailer service brakes are working after coupling?

  1. A Move forward slowly and apply the trailer brakes with the hand control
  2. B Accelerate rapidly and listen for air movement
  3. C Make a sharp turn at low speed
  4. D Watch the trailer in the mirrors while parked

Correct answer: A – Move forward slowly and apply the trailer brakes with the hand control

With normal air pressure, release the parking brakes and move forward slowly. Apply the trailer brakes using the hand control, or trolley valve, if the vehicle has one. Feeling the brakes apply confirms that the trailer service brakes are connected and operating; use the foot pedal rather than the hand control during normal driving.

Source: Mississippi Commercial Driver’s License Manual (March 2025) — § 6.5.2, “Combination Vehicle Brake Check”

Question 3

Which practices help reduce a combination vehicle’s rollover risk?

  1. A Keep the cargo low and centered
  2. B Reduce speed before curves and ramps
  3. C Steer smoothly and avoid sudden lane changes
  4. D All of the above

Correct answer: D – All of the above

A high or off-center load raises rollover risk by making the vehicle less stable. Drivers should keep cargo as low and centered as possible and enter turns, ramps, and corners at a safe speed. Smooth steering is also important because sudden movements can produce rearward amplification and overturn a trailer.

Source: Mississippi Commercial Driver’s License Manual (March 2025) — § 6.1.1, “Rollover Risks”; § 6.1.2, “Steer Gently”

Question 4

The fifth-wheel jaws surround the kingpin, but the locking lever is not in the locked position. What does this indicate?

  1. A The tractor is ready to pull the trailer
  2. B The entire fifth wheel must automatically be replaced
  3. C The coupling is incorrect and must be fixed before driving
  4. D The fifth wheel is ready to be adjusted for weight distribution

Correct answer: C – The coupling is incorrect and must be fixed before driving

The Mississippi CDL manual requires the fifth-wheel locking lever to be in the locked position and the safety latch to be properly engaged. The jaws must also close around the kingpin’s shank, not its head. If any part of the coupling is incorrect, do not drive the coupled unit until the problem is fixed.

Source: Mississippi Commercial Driver’s License Manual (March 2025) — § 6.4.1, “Coupling Tractor-Semitrailers”

Question 5

Why should the trailer hand valve not be used for routine braking while driving?

  1. A It applies the brakes too slowly
  2. B It operates the parking brakes instead
  3. C It cannot be reached from the driver’s seat
  4. D It can cause the trailer to skid

Correct answer: D – It can cause the trailer to skid

The trailer hand valve should be used only to test the trailer brakes. Using it while driving applies the trailer brakes without applying all the vehicle’s brakes, increasing the danger of a trailer skid or jackknife. During normal operation, use the foot brake because it applies the service brakes at all wheels.

Source: Mississippi Commercial Driver’s License Manual (March 2025) — § 6.2.1, “Trailer Hand Valve”

Question 6

How do you use the trailer air-supply control to send air to the trailer tanks?

  1. A Connect the blue service line to the red supply line
  2. B Pull the trailer air-supply control out
  3. C Disconnect the service-line glad hand
  4. D Push the trailer air-supply control in

Correct answer: D – Push the trailer air-supply control in

On newer vehicles, the trailer air-supply control is a red, eight-sided knob. Pushing it in opens the air supply and charges the trailer through the emergency, or supply, line. Pulling it out shuts off the air and applies the trailer emergency brakes.

Source: Mississippi Commercial Driver’s License Manual (March 2025) — § 6.2.3, “Trailer Air Supply Control”

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