Kansas CDL Air Brakes Practice Test (KS) 2

5 out of 5 (47 votes)
80% Passing score
20 Questions
4 Mistakes allowed
Getting ready for your Kansas CDL air brake test has never been easier with our Kansas DMV practice test. Crafted and thoroughly reviewed by professional driving instructors with decades of experience, our Kansas practice driving test ensures that you're studying the right material. The 20 multiple-choice questions are based on the official Kansas driver's manual, ensuring you're familiar with the exact content you'll see on the real test. Kansas is known for its wide-open spaces and ever-changing weather, which can significantly impact driving conditions. Our Kansas CDL air brake practice test not only prepares you for the standard content but also helps you understand how to handle your vehicle in various local conditions. From understanding the nuances of a dual air brake system to mastering the specifics of safety inspections, every question is designed to prepare you comprehensively. With this permit practice test, you'll delve into essential topics such as the components and operation of air brake systems, safety inspections, and stopping distance calculations. The dual air brake system, a critical safety feature providing a backup in case one system fails, is also covered. To pass this Kansas CDL air brake test, you need to correctly answer at least 16 out of 20 questions, a requirement that mirrors the standards of the actual test. Our Kansas DMV air brake test is crafted to mimic the real test in both format and content. This familiarity helps reduce test-day anxiety, as you'll know exactly what to expect. As you navigate the roads of Kansas, from the Flint Hills to the expansive farmlands, having a thorough understanding of air brake systems is crucial for your safety and the safety of others on the road. Take the Kansas driver's license practice test now and ensure you're fully prepared for your CDL air brakes test. With questions rooted in the Kansas driver's manual and refined by experienced professionals, you'll have the confidence and knowledge needed to pass your test and handle Kansas's unique driving conditions.
FREE CDL Practice Test App
Pass your Kansas CDL Air Brake test with the NextDoorDriving app. Real questions and answers—100% free and ad-free.
Download on the App Store

Sample Kansas Air Brakes Test Questions

Question 1

Which instrument is required on an air-brake vehicle?

  1. A At least two air storage tanks
  2. B A supply pressure gauge showing the air available in the tanks
  3. C An air-use gauge measuring brake-chamber consumption
  4. D A separate tank for releasing the spring brakes

Correct answer: B – A supply pressure gauge showing the air available in the tanks

The Kansas CDL manual calls this instrument a supply pressure gauge. Every air-brake vehicle has one connected to an air tank to display available pressure. A dual air system has separate gauges for its two sides or one gauge with two needles. The number of air tanks varies among vehicles.

Source: Commercial Driver’s License Manual – Modernized Testing System — § 5.1.9, “Supply Pressure Gauges”

Question 2

What braking method should you use in a tractor-trailer equipped with ABS?

  1. A Brake normally, using only the force needed to stop safely
  2. B Apply more pressure than you would without ABS
  3. C Fully apply the brakes every time you slow down
  4. D Use stab braking during every stop

Correct answer: A – Brake normally, using only the force needed to stop safely

Use normal braking procedures and apply only enough force to stop safely while maintaining control. Brake the same way whether ABS is installed on the tractor, trailer, or both. Monitor the combination as it slows and ease off the brakes if safely necessary to regain control. ABS does not permit faster driving or closer following.

Source: Commercial Driver’s License Manual – Modernized Testing System — § 6.3.2, “Braking with ABS”

Question 3

What additional factor increases stopping distance in a vehicle with air brakes?

  1. A Perception distance
  2. B Reaction distance
  3. C Brake lag distance
  4. D Braking distance

Correct answer: C – Brake lag distance

The Kansas manual identifies brake lag as the added delay between pressing the pedal and the air brakes beginning to work. Air may take one-half second or longer to travel through the lines. Total stopping distance includes perception distance, reaction distance, brake lag distance, and braking distance. Hydraulic brake systems do not have this air-flow delay.

Source: Commercial Driver’s License Manual – Modernized Testing System — § 5.4.4, “Stopping Distance”

Question 4

During an air-brake check, the compressor should normally cut in at about:

  1. A 80 psi
  2. B 100 psi
  3. C 125 psi
  4. D 150 psi

Correct answer: B – 100 psi

The governor normally allows the compressor to begin pumping when tank pressure falls to about 100 psi. It normally stops the compressor at a cut-out pressure of about 125 psi. During the inspection, reducing tank pressure should cause the gauge to begin rising again near the specified cut-in pressure. Always check the vehicle manufacturer’s specifications.

Source: Commercial Driver’s License Manual – Modernized Testing System — § 5.3.3, “Check Air Compressor Governor Cut-in and Cut-out Pressures”

Question 5

What should you do if the low-air-pressure warning activates while driving?

  1. A Stop and safely park as soon as possible
  2. B Continue to the next repair facility
  3. C Disable the warning device
  4. D Repeatedly pump the brake pedal

Correct answer: A – Stop and safely park as soon as possible

Stop and safely park the vehicle as soon as possible when the low-air-pressure warning comes on. Low pressure may prevent part of the braking system from operating fully and can increase stopping distance. If pressure continues falling, the spring brakes may apply. The problem must be repaired before the vehicle is driven again.

Source: Commercial Driver’s License Manual – Modernized Testing System — § 5.4.7, “Low Air Pressure”

Question 6

On a long, steep downgrade, service brakes should only supplement the engine’s braking effect. True or false?

  1. A True
  2. B False

Correct answer: A – True

Engine braking should provide the main speed-control effect on a long or steep downgrade. After selecting the proper low gear, use the service brakes in controlled applications to keep the vehicle at a safe speed. Excessive service-brake use creates heat and can cause brake fade. Continued overheating may eventually leave too little braking force to control the vehicle.

Source: Commercial Driver’s License Manual – Modernized Testing System — § 5.4.5, “Brake Fading or Failure”, Commercial Driver’s License Manual – Modernized Testing System — § 5.4.6, “Proper Braking Technique”

More Kansas CDL Practice Tests
Other CDL Endorsements