Utah CDL Air Brakes Practice Test (UT) 2

4.9 out of 5 (51 votes)
80% Passing score
20 Questions
4 Mistakes allowed
Are you preparing for your commercial driver's license (CDL) air brakes endorsement? Our Utah DMV practice test is here to help you succeed. This Utah CDL air brake practice test features 20 multiple-choice questions designed to cover all essential topics. From understanding components and operations to mastering safety inspections and stopping distance calculations, this practice permit test has it all. Notably, it includes critical information about dual air brake systems, which are essential for safety, providing a backup if one system fails. To pass this CDL air brake test, you need to answer at least 16 questions correctly. This ensures you're well-prepared for the actual written permit test. What sets our Utah permit practice test apart is the stress-free environment it provides. Unlike the actual test, there's no pressure here, allowing you to learn and absorb the material at your own pace. Many questions in this Utah learners permit practice test come with visual aids, such as images, which are particularly helpful for visual learners. This approach ensures you understand the questions better and retain the information longer. Plus, our wide variety of questions means you get a comprehensive understanding of the material, thoroughly preparing you for the real test. Living and driving in Utah comes with its own unique challenges. From navigating the mountainous terrain to dealing with sudden weather changes, having a solid understanding of your vehicle's air brake system is crucial. This Utah air brakes CDL test is designed with these local factors in mind, ensuring you're ready for anything Utah roads throw your way. Whether you're preparing to drive through the rugged landscapes of the Wasatch Range or the busy streets of Salt Lake City, our driver's permit practice test provides the preparation you need. With this Utah DMV practice test, you can confidently approach your CDL test, knowing you've covered all necessary topics comprehensively.
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Sample Utah Air Brakes Test Questions

Question 1

Which air-brake component may add alcohol to the system to reduce cold-weather icing?

  1. A An air-compressor heater
  2. B An air-tank warming unit
  3. C An alcohol evaporator
  4. D A one-way check valve

Correct answer: C – An alcohol evaporator

Some air-brake systems use an alcohol evaporator to introduce alcohol into the system. The alcohol helps reduce ice formation in valves and other components during cold weather. The Utah CDL handbook warns that ice inside the system can prevent the brakes from working properly, and the alcohol container must be maintained as directed.

Source: Utah Commercial Driver License Handbook — § 5.1.5, “Alcohol Evaporator”

Question 2

During an applied leakage test on a combination vehicle, what is the greatest allowable pressure drop in one minute?

  1. A 2 psi
  2. B 2.5 psi
  3. C 3 psi
  4. D 4 psi

Correct answer: D – 4 psi

For this test, fully apply the foot brake and hold it for one minute after preparing the vehicle as directed. In a combination vehicle, a pressure loss greater than four psi during that minute is excessive. The Utah CDL handbook directs the driver to locate and repair excessive leakage before operating the vehicle.

Source: Utah Commercial Driver License Handbook — § 5.3.3, “Step 7 Final Air Brake Check”

Question 3

At normal operating rpm, what pressure buildup should a dual air system normally achieve?

  1. A 85 to 100 psi within three minutes
  2. B 85 to 100 psi within 45 seconds
  3. C Governor cutout by 75 psi
  4. D Safety-valve opening at 125 psi

Correct answer: B – 85 to 100 psi within 45 seconds

At normal operating rpm, pressure in a dual air system should rise from 85 to 100 psi within 45 seconds. A vehicle with air tanks larger than the required minimum may take longer and still be safe. In that situation, use the vehicle manufacturer’s specifications to evaluate the buildup time.

Source: Utah Commercial Driver License Handbook — § 5.3.3, “Step 7 Final Air Brake Check”

Question 4

The low air pressure warning activates while you are driving. What should you do?

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

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

Stop and safely park as soon as possible when the warning activates. The Utah CDL handbook advises stopping while enough pressure remains to control the vehicle with the foot brake. If pressure continues falling, the spring brakes may apply automatically, potentially causing a skid or loss of control.

Source: Utah Commercial Driver License Handbook — § 5.4.7, “Low Air Pressure”

Question 5

An air-brake-equipped vehicle is described as having service, parking, and emergency braking systems.

  1. A True
  2. B False

Correct answer: A – True

Air brakes are described as three braking systems: service, parking, and emergency. The service system operates through the brake pedal during normal driving, while the parking system is operated by the parking-brake control. The emergency system uses parts of the service and parking systems to stop the vehicle following a brake-system failure.

Source: Utah Commercial Driver License Handbook — Section 5, “Air Brakes”

Question 6

A dual air-brake system has two separate circuits known as the primary and secondary systems.

  1. A True
  2. B False

Correct answer: A – True

A dual system contains two separate air-brake systems operated by one set of controls. Each has its own tanks, hoses, and lines, and both systems normally supply air to a connected trailer. The Utah CDL handbook identifies these circuits as the primary and secondary systems and directs drivers to monitor pressure in both.

Source: Utah Commercial Driver License Handbook — § 5.2, “Dual Air Brake”

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