Kansas CDL Combination Practice Test (KS) 2

4.8 out of 5 (55 votes)
80% Passing score
20 Questions
4 Mistakes allowed
If you're preparing for your Kansas CDL combination test, you're in the right place. This Kansas CDL combination practice test is a reliable tool designed to help you succeed. With 20 multiple-choice questions covering critical topics such as inspection procedures, safe driving practices, air brake systems, and more, you'll get a comprehensive review of what you need to know. To pass, you need to answer at least 16 questions correctly. One key area of focus is understanding the risks of jackknifing, where the trailer swings out of alignment with the tractor. Smooth braking and careful handling are vital skills to master to avoid this dangerous situation. By practicing these scenarios, you build the confidence needed for real-world driving. Kansas presents unique driving conditions, from the rolling Flint Hills to the bustling urban streets of Kansas City. Navigating these varied environments requires a thorough understanding of vehicle dynamics and safety protocols. This Kansas CDL combination practice test is tailored to address these specific challenges, ensuring you're well-prepared for the diverse driving experiences you'll encounter. Instead of relying on dubious DMV test cheat sheets, which often promise quick fixes without guaranteed results, our Kansas CDL combination practice test offers a legitimate and proven approach to studying. You can trust that this practice test is lawful and effective, providing a solid foundation for your test preparation. Upon completing the Kansas CDL combination practice test, you have the opportunity to review your answers, along with hints and explanations for any questions you missed. This review process reinforces your learning and helps identify areas where you need further study. To maximize your preparation, consider supplementing the Kansas CDL combination practice test with additional study materials. The Kansas Driver's Handbook, state-certified drivers ed courses, flashcards, and road sign charts are excellent resources to ensure you cover all aspects of the Kansas driving test practice. Start your preparation today with our Kansas CDL combination practice test and move one step closer to obtaining your Commercial Driver's License in Kansas.
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Sample Kansas Combination Test Questions

Question 1

Immediately before backing the tractor completely under the trailer, what condition must be verified?

  1. A The tractor protection valve is supplying air normally
  2. B All tractor and trailer brakes are released
  3. C The trailer landing gear is fully raised
  4. D The trailer brakes are locked

Correct answer: D – The trailer brakes are locked

After checking the trailer brake system and restoring normal air pressure, lock the trailer brakes. Pull out the trailer air-supply knob or place the tractor protection control in the emergency position. Then back slowly under the trailer in the lowest reverse gear. The locked brakes help keep the trailer from moving while the kingpin enters and locks into the fifth wheel.

Source: Commercial Driver’s License Manual – Modernized Testing System — § 6.4.1, “Step 9. Lock Trailer Brakes” and “Step 10. Back Under Trailer”

Question 2

How should the trailer height be set before the tractor backs completely under it?

  1. A High enough that the trailer does not move vertically
  2. B With the kingpin above the fifth-wheel jaws
  3. C With the landing gear fully retracted
  4. D Low enough that the tractor raises the trailer slightly

Correct answer: D – Low enough that the tractor raises the trailer slightly

Set the trailer low enough that the tractor raises it slightly while backing underneath. If the trailer is too low, the tractor can strike and damage the trailer nose. If it is too high, the kingpin may fail to couple correctly with the fifth wheel. The kingpin and fifth wheel must also be properly aligned before backing under.

Source: Commercial Driver’s License Manual – Modernized Testing System — § 6.4.1, “Step 6. Check Trailer Height”

Question 3

Why should the trailer hand valve not be used to correct a trailer jackknife?

  1. A The hand valve does not operate any trailer brakes
  2. B Further braking of the skidding trailer wheels prevents them from regaining traction
  3. C The hand valve cannot be reached during a skid
  4. D The hand valve should always be used during a trailer jackknife

Correct answer: B – Further braking of the skidding trailer wheels prevents them from regaining traction

A trailer jackknife commonly begins when the trailer wheels lock and lose traction. Applying the trailer hand valve keeps braking the wheels that are already skidding. Release the brakes to allow those wheels to roll and regain their grip on the road. Once traction returns, the trailer can begin following the tractor and straighten out.

Source: Commercial Driver’s License Manual – Modernized Testing System — § 6.1.5, “Prevent Trailer Skids”

Question 4

Which combination is especially likely to become stuck on a raised railroad-highway crossing?

  1. A Any tank trailer, regardless of clearance
  2. B Any trailer carrying placarded hazardous materials
  3. C A low-slung trailer or a long trailer pulled by a single-axle tractor with landing gear set for a tandem-axle tractor
  4. D Every combination vehicle to the same degree

Correct answer: C – A low-slung trailer or a long trailer pulled by a single-axle tractor with landing gear set for a tandem-axle tractor

The Kansas manual identifies low-slung units such as lowboys, car carriers, moving vans, and possum-belly livestock trailers as vulnerable at raised crossings. A long trailer pulled by a single-axle tractor may also hang up when its landing gear is positioned for a tandem-axle tractor. These configurations can have insufficient clearance over the crossing’s raised surface. Hazardous-material status alone does not determine clearance.

Source: Commercial Driver’s License Manual – Modernized Testing System — § 6.1.4, “Railroad-highway Crossings”

Question 5

How should you verify that air reaches both lines at the rear of the last trailer?

  1. A Open the emergency and service shut-off valves one at a time and listen for escaping air
  2. B Open both air-line valves at the rear of the tractor
  3. C Accelerate and make a hard brake application
  4. D Shut off the engine and listen only for general air leaks

Correct answer: A – Open the emergency and service shut-off valves one at a time and listen for escaping air

Charge the emergency line and apply pressure to the service line before checking the rear of the last trailer. The Kansas manual directs the driver to open each rear shut-off valve separately and listen for escaping air, closing each valve after its test. Air from both lines shows that pressure reaches the back of the combination. If either line has no airflow, check that upstream shut-off valves are open.

Source: Commercial Driver’s License Manual – Modernized Testing System — § 6.5.2, “Check That Air Flows to All Trailers”

Question 6

If curved trailer backing is unavoidable, you should arrange the approach so you can back toward the driver’s side. True or false?

  1. A True
  2. B False

Correct answer: A – True

The Kansas manual recommends positioning the combination for straight-line backing whenever possible. If you must follow a curved path, back toward the driver’s side so you can see more of the trailer and its path. Check both mirrors frequently, back slowly, and correct any drift promptly. Get out and inspect the path again whenever you are unsure of clearance.

Source: Commercial Driver’s License Manual – Modernized Testing System — § 6.1.7, “Backing with a Trailer”

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