Free Montana CDL School Bus Endorsement Test Practice Test
Realistic 25-question practice exam with instant feedback and score reports.
Share this practice test
Send the link — they sign in free and start their own CDL School Bus Endorsement practice exam.
About this practice exam
Free Montana CDL School Bus Endorsement Test practice test with 25 realistic multiple-choice questions, instant grading, and explanations. Study with drill mode, category score reports, and a personalized review plan.
Exam format
- 25 multiple-choice practice questions
- Drill mode with instant feedback and explanations after each answer
Study tips
- Review the official exam content outline before your first practice run.
- Take the full practice exam once to establish a baseline score by category.
- Focus review on categories where you score below the passing threshold.
- Re-take missed questions in drill mode until you can explain each correct answer.
- Schedule the real exam only after consistent passing scores on practice tests.
Sample CDL School Bus Endorsement practice questions
Try a few representative questions below. Each includes the correct answer and a short explanation — the same style you'll see in the full practice test.
- Question 1Air Brakes
A school bus is equipped with a Type C air brake system. During a pre-trip inspection, you notice that the air pressure is dropping at a rate of 3 PSI per minute after the engine has been shut off and the brakes have been released. According to CDL regulations, what is the maximum allowable air loss for a system of this type?
- A.3 PSI per minute
- B.2 PSI per minute(Correct)
- C.4 PSI per minute
- D.1 PSI per minute
Explanation
For a school bus equipped with air brakes, the maximum allowable air loss is 2 PSI in the first minute and 3 PSI in the second minute after the engine has been shut off and the brakes have been released. A 3 PSI loss in one minute exceeds this limit, indicating a potential leak.
- Question 2Passenger Safety & Emergency Procedures
You are transporting 30 elementary school students. During the route, a student in the back begins to experience a severe allergic reaction, including difficulty breathing and swelling of the face. What is the *first* action you should take?
- A.Ask other students if they have any medications that might help.
- B.Immediately administer the student's epinephrine auto-injector (if available and you are trained).
- C.Continue driving to the nearest school to inform the administration.
- D.Pull over to a safe location, activate hazard lights, and call 911.(Correct)
Explanation
The absolute first priority is to ensure the safety of all passengers and to get immediate professional medical help. Pulling over safely, securing the bus, and calling 911 are the immediate steps, followed by administering any necessary medication.
- Question 3Vehicle Inspection & Maintenance
When performing a post-trip inspection, you discover that one of the rear tires on your school bus has a tread depth of only 2/32 of an inch. What is the minimum legal tread depth for the steer tires of a commercial vehicle in Montana, and what action should you take?
- A.5/32 inch; you must immediately take the bus out of service and arrange for tire replacement.
- B.2/32 inch; this is within legal limits for rear tires, so no action is needed.
- C.4/32 inch; you must immediately take the bus out of service and arrange for tire replacement.(Correct)
- D.3/32 inch; you should note this in your inspection report and monitor it.
Explanation
The minimum legal tread depth for steer tires on a commercial vehicle is 4/32 of an inch. While 2/32 is the minimum for rear tires, steer tires are critical for steering and control. This tire is below the minimum for steer tires and must be replaced before the bus is operated.
Want the full exam? Start the free practice test →
Frequently asked questions
How many questions are on this CDL School Bus Endorsement practice test?
This practice test includes 25 multiple-choice questions designed to mirror the format and difficulty of the real Montana CDL School Bus Endorsement Test.
Is this CDL School Bus Endorsement practice test free?
Yes. You can start practicing for free. Create an account to save progress, track weak categories, and retake the exam.
Do I get explanations after each question?
Yes. In drill mode you see why the correct answer is right, why distractors are wrong, and practical examples where relevant.
How should I use this practice test to prepare?
Take the full exam under timed conditions, review missed questions by category, then focus study on your weakest sections before scheduling the real exam.
Does this replace official exam materials?
No. Use this as a supplement alongside official candidate information bulletins, textbooks, and hands-on experience required for your license or certification.
Related practice tests
Ready to test your knowledge?
Free 25-question practice exam — no sign-up required to try.