Idaho Class A CDL Practice Test (ID) 8

5 out of 5 (37 votes)
80% Passing score
50 Questions
10 Mistakes allowed
Aspiring commercial drivers in Idaho, get ready to elevate your preparation in 2026 with our Idaho Class A CDL Practice Test! This is not just any DMV practice test; it's the eighth in our comprehensive series, designed to closely mirror the real Idaho CDL exam. With 50 well-crafted permit test questions and answers, you're given a robust platform to assess and enhance your knowledge. Achieving a score of 40 or more signifies that you're well on your way to mastering the essentials of commercial driving in 2026! What sets our Idaho CDL practice test apart is the expertise behind its creation. Our questions aren't just randomly compiled; they're carefully written and meticulously reviewed by professional driving instructors. These seasoned experts bring a wealth of experience, having guided thousands of drivers towards successfully obtaining their licenses. Their insights ensure that every question is relevant, challenging, and educational. This Idaho class A CDL practice test encompasses a wide array of topics vital for any Class A CDL applicant. From the nuances of pre-trip vehicle inspection to the challenges of shifting gears and navigating hills, we've got you covered. We also delve into crucial aspects like effective communication with other road users, speed control, and the critical awareness required regarding drugs and alcohol. One of the unique features of our general knowledge practice test is the incorporation of visual learning aids. Recognizing that many learners absorb information best through visual stimuli, we've included images and diagrams, particularly for topics like road signs and traffic scenarios. Additionally, we've integrated real-life driving scenarios into the DMV CDL practice test. This approach not only tests your theoretical knowledge but also prepares you for practical situations you'll encounter on the road. Remember, consistency is key! This Idaho CDL practice test is structured to present the same set of questions each time, allowing you to track your progress and focus on areas needing improvement. So, Idahoans, gear up and use this tool to get a step closer to achieving your Class A CDL in 2026!
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Sample Idaho CDL Test Questions - General Knowledge

Question 1

How should you position a parked commercial vehicle when possible?

  1. A Where the inspection can be skipped before departure
  2. B So you can pull forward when leaving
  3. C So backing is limited to exactly 10 feet
  4. D As close as possible to a freeway entrance

Correct answer: B – So you can pull forward when leaving

Backing is hazardous because the driver cannot see everything behind a commercial vehicle. The Idaho CDL manual advises planning the parking position so the vehicle can pull forward when leaving. This reduces the need to perform a backing maneuver in an area where pedestrians, vehicles, or fixed objects may be hidden from view.

Source: Idaho Commercial Driver’s License Manual — § 2.2.4, “Backing Safely”

Question 2

While operating a CMV in Idaho, how should you respond to an aggressive driver?

  1. A Make direct eye contact
  2. B Respond with similar gestures
  3. C Accelerate to stay ahead
  4. D Avoid reacting and safely move out of the driver’s way

Correct answer: D – Avoid reacting and safely move out of the driver’s way

Make every safe effort to get out of an aggressive driver’s way. Do not challenge the driver by speeding up or trying to hold your lane, and avoid eye contact. Ignore hostile gestures rather than returning them. If reporting the driver, provide identifying and location information only when it can be done safely.

Source: Idaho Commercial Driver’s License Manual — § 2.10.3, “What You Should Do When Confronted by an Aggressive Driver”

Question 3

When should you select a lower range in an automatic transmission for a steep downgrade?

  1. A Before beginning the descent
  2. B After beginning an upgrade
  3. C Halfway through a curve
  4. D While exiting a curve

Correct answer: A – Before beginning the descent

Choose the proper low gear or transmission range before starting down a steep grade. A lower automatic-transmission range provides greater engine braking and prevents unwanted upshifts beyond the selected range. Trying to force an automatic transmission into a lower gear after excessive speed has developed can damage the transmission and reduce engine-braking control.

Source: Idaho Commercial Driver’s License Manual — § 2.3.3, “Automatic Transmissions”, Idaho Commercial Driver’s License Manual — § 2.16.2, “Select the Right Gear before Starting Down the Grade”

Question 4

According to the CDL manual, approximately how many truck-driver crash deaths result from truck rollovers?

  1. A About one-tenth
  2. B About one-fifth
  3. C More than half
  4. D All of them

Correct answer: C – More than half

The Idaho CDL manual states that more than half of truck-driver deaths in crashes result from truck rollovers. A high center of gravity increases rollover risk, especially when cargo is stacked high or placed off-center. Keeping cargo low and centered and reducing speed before turns are important rollover-prevention practices.

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

Question 5

What should you do before driving if you are drowsy?

  1. A Eat a large meal
  2. B Sleep
  3. C Rely on coffee
  4. D Exercise briefly

Correct answer: B – Sleep

If you are drowsy before driving, sleep before beginning the trip. When sleepiness develops on the road, stop at the nearest safe place rather than trying to push through it. The CDL manual identifies sleep as the only safe cure for drowsiness; coffee and other temporary measures do not replace needed rest.

Source: Idaho Commercial Driver’s License Manual — § 2.11.5, “Night Driving Procedures”

Question 6

A long commercial vehicle must swing wide to complete a right turn. How should the driver begin the turn?

  1. A Swing left before entering the intersection
  2. B Begin near the right curb and turn wide only while completing the turn
  3. C Move into the left lane and turn from there
  4. D Approach diagonally across both lanes

Correct answer: B – Begin near the right curb and turn wide only while completing the turn

Begin the right turn with the rear of the vehicle close to the curb. If additional room is needed, turn wide as you complete the maneuver rather than swinging left before starting. An initial left swing can mislead a following driver into attempting to pass on the right, creating a collision risk as the commercial vehicle completes its turn.

Source: Idaho Commercial Driver’s License Manual — § 2.7.6, “Space for Turns”

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