Iowa CDL School Bus Practice Test (IA) 2026

4.8 out of 5 (77 votes)
80% Passing score
20 Questions
4 Mistakes allowed
If you're looking to obtain your commercial driver's license with a school bus endorsement in Iowa, our Iowa school bus practice test is an invaluable resource. This comprehensive Iowa CDL school bus test includes a diverse mix of questions that are essential for mastering the skills and knowledge required for the actual permit test. Whether you are preparing for safety procedures, pre-trip inspections, basic control skills, or on-road driving, this Iowa DOT practice test covers it all. The school bus endorsement test consists of 20 multiple-choice questions. To pass, you need to answer at least 16 questions correctly. This format closely mimics the real permit test, helping you get familiar with the type of questions you will encounter. By practicing with our Iowa school bus practice test, you'll gain the confidence needed to succeed. One of the standout features of this CDL school bus practice test is the end-of-test summaries. At the conclusion of each driving practice test, you will receive a detailed summary of your performance. This summary highlights the questions you answered incorrectly and provides the correct answers for each, enhancing your learning experience and helping you understand the material more thoroughly. While the Iowa practice permit test does not replace a state-certified driver's education or ELDT course, it serves as an excellent complementary tool. Using this permit practice test alongside your formal training can significantly boost your understanding of the material and improve your chances of passing the actual test. In addition to the question-based learning, you will also discover information about the unique design and safety features of school buses. Painted in National School Bus Glossy Yellow, these vehicles are designed to be highly visible and safe for transporting students. Understanding these distinctive characteristics is crucial for any aspiring school bus driver. Prepare yourself thoroughly with our Iowa school bus practice test and approach your permit test with confidence and knowledge.
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Sample Iowa School Bus Test Questions

Question 1

If a school bus has a passenger lift, what must be checked during the vehicle inspection?

  1. A Whether wheelchairs are leaking, damaged, or missing
  2. B Whether lift parts are leaking, damaged, or missing and the lift is fully retracted and latched
  3. C Whether the lift is partly retracted and loosely latched
  4. D Only whether the lift platform is clean

Correct answer: B – Whether lift parts are leaking, damaged, or missing and the lift is fully retracted and latched

Inspect a passenger lift for leaking, damaged, or missing components and explain how its operation should be checked. Before travel, the lift must be fully retracted and securely latched. This prevents the lift from extending or moving while the bus is being driven.

Source: Commercial Driver’s License Manual – Modernized Testing System — § 11M.2, “Passenger Entry and Lift”

Question 2

Where are a school bus’s outside crossover mirrors mounted?

  1. A Along the center of the roof
  2. B At the rear corners
  3. C At the left and right front corners
  4. D Beside the rear wheels

Correct answer: C – At the left and right front corners

Crossover mirrors are installed at the left and right front corners of the school bus. They help the driver see the front-bumper danger zone and areas beside the front of the bus that cannot be viewed directly. They should be used with the flat and convex mirrors in a logical sequence.

Source: Commercial Driver’s License Manual – Modernized Testing System — § 10.1.5, “Outside Left and Right Side Crossover Mirrors”

Question 3

After boarding students are seated and accounted for, which pair of actions is part of preparing to reenter traffic?

  1. A Close the door and turn off the alternating red lights
  2. B Open the door and activate the hazard lights
  3. C Leave the red lights on and release the parking brake
  4. D Move the bus before checking the mirrors

Correct answer: A – Close the door and turn off the alternating red lights

The departure sequence includes closing the door, engaging the transmission, releasing the parking brake, turning off the alternating red lights, signaling, and checking the mirrors again. Iowa law also requires the flashing lamps to be turned off and the stop arm retracted after pupils have been received or discharged. Move only when it is safe to enter traffic.

Source: Commercial Driver’s License Manual – Modernized Testing System — § 10.2.2, “Loading Procedures”, Iowa Code § 321.372(1)(a) – Discharging Pupils—Stopping Requirements—Penalties

Question 4

In Iowa, traffic traveling in the same direction as a stopped school bus must stop for its extended stop arm even on a four-lane divided highway.

  1. A True
  2. B False

Correct answer: A – True

A driver overtaking a stopped school bus must stop no closer than 15 feet away when the stop arm is extended. The vehicle must remain stopped until the arm is retracted and the bus resumes motion. The exception for a highway with at least two lanes in each direction applies only to traffic meeting the bus from the opposite direction.

Source: Iowa Code § 321.372(3)(b), (4) – Discharging Pupils—Stopping Requirements—Penalties

Question 5

On an ordinary two-way road with one lane in each direction, only traffic behind a stopped school bus must stop for its extended stop arm.

  1. A True
  2. B False

Correct answer: B – False

On this type of road, traffic approaching from either direction must stop when the school bus is stopped with its stop arm extended. Iowa’s opposite-direction exception applies only on highways providing two or more lanes in each direction. Overtaking traffic must also stop at least 15 feet from the bus and wait until the stop arm retracts and the bus moves.

Source: Iowa Code § 321.372(3)(a)–(b), (4) – Discharging Pupils—Stopping Requirements—Penalties

Question 6

After selecting the safest type of school bus evacuation, what should the driver do next?

  1. A Secure the bus
  2. B Wait to notify dispatch before taking any other action
  3. C Hang the radio microphone outside immediately
  4. D Open every window for student use

Correct answer: A – Secure the bus

Once the evacuation type is chosen, secure the bus before ordering students to evacuate. Place the transmission in Park, or Neutral if there is no Park position; set the parking brake; shut off the engine; remove the ignition key; and activate the hazard-warning lights. Dispatch should be notified if time allows.

Source: Commercial Driver’s License Manual – Modernized Testing System — § 10.3.2, “Evacuation Procedures”

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