Minnesota CDL Combination Practice Test (MN) 2

4.8 out of 5 (76 votes)
80% Passing score
20 Questions
4 Mistakes allowed
MN's diverse landscape presents unique challenges for commercial drivers, from icy conditions in the North to heavy traffic in the Twin Cities. This Minnesota DMV permit test practice is designed to equip you with the knowledge and skills necessary to navigate these varied environments safely. Featuring 20 multiple-choice questions, our combination CDL practice test covers essential topics such as inspection procedures, safe driving practices, air brake systems, and more. You need to answer at least 16 questions correctly to pass, ensuring a comprehensive understanding of the material. Our MN practice permit test is not just a set of questions; it's a reliable study tool crafted to reinforce your understanding of the key concepts required for the actual permit test. Unlike cheat sheets that claim to have all the answers, our Minnesota CDL combination test offers a lawful and effective approach to CDL preparation, with a proven track record of success. Taking this MN combination vehicle test allows you to study in a no-pressure environment, unlike the actual written test where the stakes are high. This stress-free setting helps you absorb the material better, making you a more confident and competent driver. Some questions on the CDL combination practice test are based on real-life driving scenarios, which not only prepare you for the test but also enhance your practical driving skills. For instance, understanding the risks of jackknifing and learning how to avoid it through smooth braking and careful handling is crucial for safe driving in Minnesota's snowy winters. By engaging with this MN permit test practice, you'll gain valuable insights into safe driving techniques, making you well-prepared for both the permit test and real-world driving. Whether you're navigating the busy highways around Minneapolis or the rural roads in the state's southern regions, this Minnesota CDL combination test will ensure you're ready for any challenge that comes your way.
FREE CDL Practice Test App
Pass your Minnesota CDL Combination Vehicles test with the NextDoorDriving app. Real questions and answers—100% free and ad-free.
Download on the App Store

Sample Minnesota Combination Test Questions

Question 1

Why must the trailer hand valve not be used as a parking brake?

  1. A On a trailer without spring brakes, air can leak away and release the brakes
  2. B It can damage the trailer tires while parked
  3. C It prevents the air compressor from operating
  4. D It makes the fifth wheel difficult to uncouple

Correct answer: A – On a trailer without spring brakes, air can leak away and release the brakes

The trailer hand valve applies the trailer brakes using air pressure. On trailers without spring brakes, stored air may eventually leak away and release those brakes. Use the vehicle’s parking brakes when parking, and use wheel chocks when the trailer has no spring brakes.

Source: Minnesota Commercial Driver’s License Manual — § 6.2.1, “Trailer Hand Valve”

Question 2

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

  1. A Open the rear emergency shut-off, close it, and then open the rear service shut-off
  2. B Open both shut-off valves at the rear of the tractor
  3. C Drive at highway speed and make a hard brake application
  4. D Shut off the engine and listen near the tractor’s air tanks

Correct answer: A – Open the rear emergency shut-off, close it, and then open the rear service shut-off

Secure the vehicle, build normal air pressure and supply air to the trailer. At the rear of the last trailer, open the emergency-line shut-off and listen for escaping air, then close it. Apply service pressure, open the service-line shut-off and listen again before closing it; air must reach the rear for all brakes to work.

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

Question 3

What must a combination-vehicle driver account for because of off-tracking?

  1. A The trailer requires more fuel while turning
  2. B The trailer tires rotate faster than the tractor tires
  3. C The rear wheels follow a different, more inward path through a turn
  4. D The fifth wheel may unlock during a sharp turn

Correct answer: C – The rear wheels follow a different, more inward path through a turn

Off-tracking occurs when the rear wheels follow a different path from the front wheels while turning. Longer vehicles off-track more, and the last trailer’s rear wheels off-track the most in a multi-trailer combination. The Minnesota CDL manual teaches drivers to account for this inward wheel path when making turns.

Source: Minnesota Commercial Driver’s License Manual — § 6.1.6, “Turn Wide”

Question 4

When combination-vehicle air lines use color identification, which pairing is correct?

  1. A Emergency line: black; service line: yellow
  2. B Emergency line: blue; service line: red
  3. C Emergency line: red; service line: blue
  4. D Emergency line: yellow; service line: green

Correct answer: C – Emergency line: red; service line: blue

The emergency line, also called the supply line, is identified by red when color coding is used. The service or control line is identified by blue. Color coding is commonly used to prevent crossed connections, although some equipment may also use metal tags marked “service” and “emergency.”

Source: Minnesota Commercial Driver’s License Manual — § 6.2.4, “Trailer Air-lines”, Minnesota Commercial Driver’s License Manual — § 6.2.5, “Hose Couplers (Glad Hands)”

Question 5

Fully loaded rigs are ten times more likely to roll over in a crash than empty rigs.

  1. A True
  2. B False

Correct answer: A – True

The CDL manual reports that fully loaded rigs are ten times more likely to roll over in a crash than empty rigs. Cargo piled high raises the vehicle’s center of gravity, making it easier to overturn. Keeping cargo low and centered and reducing speed around turns helps limit this risk.

Source: Minnesota Commercial Driver’s License Manual — § 6.1.1, “Rollover Risks”

Question 6

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

  1. A It cannot apply enough pressure to any trailer brake
  2. B It automatically applies the tractor parking brakes
  3. C It prevents the foot brake from operating
  4. D Applying only the trailer brakes can make the trailer skid

Correct answer: D – Applying only the trailer brakes can make the trailer skid

The trailer hand valve should be used only when testing the trailer brakes. Using it while driving can lock the trailer wheels and cause the trailer to skid. The foot brake applies the brakes throughout the combination, reducing the danger of causing a trailer skid or jackknife.

Source: Minnesota Commercial Driver’s License Manual — § 6.2.1, “Trailer Hand Valve”

More Minnesota CDL Practice Tests
Other CDL Endorsements