Free CDL School Bus Endorsement Practice Test 2026
The School Bus (S) endorsement is required to drive a school bus and requires the Passenger (P) endorsement as well. It covers loading and unloading students, railroad-highway crossings, student management, and emergency evacuation.
Why are loading and unloading so dangerous for school bus students?
About the CDL School Bus Endorsement Test
Driving a school bus carries some of the highest stakes on the road, which is why the S endorsement also requires the Passenger (P) endorsement first. The test concentrates on the danger zones around the bus where children are hardest to see, the strict loading and unloading procedures that prevent the most common fatalities, mandatory railroad-crossing stops, student management, and emergency evacuation. Most school-bus injuries happen outside the bus, not in a crash, so these procedures sit at the heart of the exam.
What's on the CDL School Bus Endorsement knowledge test
The School Bus Endorsement knowledge test is written from Section 10 (School Buses) of the national CDL manual, the text every state's CDL manual follows. You take it only if you need the S endorsement or drive a vehicle that requires it.
Federal rules fix the pass mark at 80 percent for every CDL knowledge test, but leave the number of questions to each state, so check your own state's CDL manual for the exact count. This practice test uses all 14 questions in our School Bus Endorsement bank, each checked against the manual page shown with it.
- Source manual
- National CDL Manual, Section 10 (School Buses)
- Number of questions
- Set by each state: federal rules require a set number of questions, with a prescribed number from each knowledge area (49 CFR 383.133)
Manual sections this test is drawn from
- Section 10: School Buses - Danger Zones and Use of Mirrors, Loading and Unloading, Emergency Exit and Evacuation, Railroad-highway Crossings, Student Management, Antilock Braking Systems, Special Safety Considerations
Sample questions from this test, with answers
Want to test yourself first? Take the test above before reading these. Every answer below is checked against the source shown.
1. Why is correct mirror adjustment so important on a school bus?
- A. To check your own appearance before starting a route
- B. To see students and objects in the danger zones (correct)
- C. To see only the traffic far behind the bus
- D. To watch the engine gauges while you drive
Why: Properly adjusted and used mirrors let you watch the danger zones for students, traffic, and objects. Check each mirror before driving and have them adjusted if needed.
Source: National CDL Manual, p.10-1 (PDF p.127), 10.1.2 Correct Mirror Adjustment
2. In an emergency, which exits should be used to evacuate a school bus?
- A. Whatever doors or exits best fit the situation (correct)
- B. The rear emergency door only, every time
- C. The front service door only, every time
- D. The roof hatches first, before any of the side doors
Why: Decide which evacuation is best: front, rear, or side doors, a combination of doors, or roof or window exits. Then lead students to a safe place at least 100 feet off the road toward oncoming traffic.
Source: National CDL Manual, p.10-7 (PDF p.133), 10.3.2 Evacuation Procedures
3. What is the 'danger zone' around a school bus?
- A. Only the area directly behind the bus
- B. The seats closest to the rear emergency exit door
- C. The area on all sides where children may be hit (correct)
- D. The lane of traffic to the bus's right
Why: The danger zone surrounds the bus. It can reach 30 feet ahead of the front bumper (the first 10 feet are most dangerous), 10 feet out from each side, and 10 feet behind the rear bumper.
Source: National CDL Manual, p.10-1 (PDF p.127), 10.1.1 Danger Zones
4. What should students be told to do if they drop something near the bus?
- A. Pick it up quickly before the bus moves
- B. Crawl under the bus to reach it if needed
- C. Leave it, move to safety, and get your attention (correct)
- D. Ask another student nearby to grab it for them
Why: Stopping to pick up a dropped object can make a student vanish from your view at a very dangerous moment. Students should leave it, move out of the danger zones, and get the driver's attention to retrieve it.
Source: National CDL Manual, p.10-5 (PDF p.131), 10.2.5 Special Dangers of Loading and Unloading
5. What do the crossover mirrors on the front corners of a school bus let you see?
- A. The danger zone directly in front of the bus (correct)
- B. The students sitting in the back rows
- C. Traffic about 200 feet behind the bus
- D. The blind spot just behind the rear bumper
Why: Crossover mirrors show the front bumper danger zone that you cannot see directly, plus the danger zones on the left and right sides, including the service door and front wheel area.
Source: National CDL Manual, p.10-2 (PDF p.128), 10.1.5 Outside Left and Right Side Crossover Mirrors
6. Before pulling away from a stop where students got off, you should:
- A. Close the door and pull out right away to stay on time
- B. Count students and check all mirrors again (correct)
- C. Wait exactly five minutes at the stop
- D. Turn off the red lights, then count
Why: Count students while unloading to confirm where all of them are, and check all mirrors to be sure no one is around or returning to the bus before you prepare to leave.
Source: National CDL Manual, p.10-4 (PDF p.130), 10.2.3 Unloading Procedures on the Route
Other CDL Endorsement Tests
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