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Exam Review

Key Facts: OK CDL School Bus Exam

20

Questions on official Oklahoma School Bus test

Service Oklahoma CDL Manual

80%

Minimum passing score (16 correct)

49 CFR 383.135

10 ft

Danger zone perimeter around school bus

Service Oklahoma CDL Manual Section 10

100 ft

Minimum safe evacuation distance from bus

Service Oklahoma CDL Manual Section 10

Service Oklahoma requires an 80% passing score (16 of 20 correct) on the CDL School Bus knowledge test. Applicants must also satisfy Passenger endorsement requirements, complete federal ELDT for school buses, hold a CLP for at least 14 days, and pass a three-part skills test in a representative school bus.

Sample OK CDL School Bus Practice Questions

Try these sample questions to review concepts for the OK CDL School Bus exam. Each question includes a detailed explanation. Start the interactive quiz above for the full 200+ question experience with AI tutoring.

1What is defined as the 'danger zone' around a school bus where children are in the greatest danger of being hit?
A.The area extending 10 feet in all directions from the front, rear, and sides of the bus
B.Only the area directly behind the rear bumper up to 5 feet
C.The area inside the bus within 2 feet of the driver's seat
D.Only the area along the left driver side between the tires
Explanation: The danger zone is the area on all sides of the school bus extending a minimum of 10 feet from the front bumper, rear bumper, and both sides, where blind spots are greatest and students are vulnerable.
2Which area around a school bus is considered the most hazardous section of the entire danger zone?
A.The left rear corner of the roof
B.The area immediately in front of the front bumper (extending 10 feet) and around the right rear tires
C.The driver's outside door handle area
D.Directly beneath the passenger floorboards
Explanation: The most dangerous areas are directly in front of the front bumper (where small children cannot be seen over the hood without crossover mirrors) and near the right rear wheels where off-tracking occurs.
3How far in front of the front bumper can the danger zone extend depending on vehicle size and student age?
A.Up to 30 feet from the front bumper
B.No more than 2 feet from the front bumper
C.Exactly 50 feet regardless of bus size
D.The front danger zone never exceeds the front bumper edge
Explanation: Because small students walk out into traffic to cross the street, the front danger zone can extend up to 30 feet from the front bumper, with the first 10 feet being the most critical.
4How far can the blind spot danger zone extend behind the rear bumper of a standard school bus?
A.Typically 50 to 150 feet and potentially up to 400 feet, depending on bus dimensions
B.No more than 5 feet behind the bus
C.Exactly 10 feet at all times
D.There is no rear blind spot if an inside mirror is present
Explanation: Section 10 says the blind spot directly behind a school bus generally extends 50 to 150 feet and can reach up to 400 feet depending on the bus's length and width.
5How should the outside flat rearview mirrors of a school bus be adjusted?
A.To see 200 feet or 4 bus lengths behind the bus, along the sides of the bus, with the rear tires touching the ground in the bottom of the mirror
B.To point toward the sky to monitor overhead tree branches
C.To reflect only the adjacent traffic lanes without showing any part of the bus body
D.To focus exclusively on the front entrance step
Explanation: Flat mirrors should show 200 feet (4 bus lengths) behind the bus, along the sides of the bus, and the rear tires touching the ground at the bottom edge of the mirror.
6What is the primary function of the outside convex mirrors located below the flat mirrors on a school bus?
A.To provide a wide-angle view of traffic, seeing the entire side of the bus up to the mirror mounts and the front of the rear tires
B.To magnify distant highway signs so they can be read earlier
C.To illuminate the roadway during heavy fog
D.To monitor student activity in the rear seat rows
Explanation: Outside convex mirrors provide a wide-angle view of the danger zones along the sides of the bus, showing the roadway next to the vehicle and the front of the rear tires touching the ground.
7What specific area must the front crossover (crossview) convex mirrors be adjusted to reflect?
A.The ground across the front of the bus from the bumper forward to where direct vision is possible, the entire front bumper danger zone, and both front tires
B.The rear license plate and exhaust pipe tip
C.The high-beam headlight patterns against the pavement
D.The overhead cloud ceiling above the bus roof
Explanation: Crossover mirrors (crossview mirrors) mounted on the front fenders are properly adjusted when they show the entire ground area in front of the bumper to where direct driver vision begins, plus the left and right front tires.
8What optical distortion must a school bus driver account for when viewing students through outside convex and crossover mirrors?
A.Objects and children appear smaller and farther away than they actually are
B.Objects and children appear much larger and closer than they actually are
C.Images are inverted upside down in daylight
D.Colors are reversed on red stop signs
Explanation: Because convex mirrors curve outward to expand the field of view, objects in the mirror appear smaller and farther away than their true physical distance.
9How should the interior rearview mirror of a school bus be adjusted?
A.To see all students inside the bus and the roadway immediately behind the bus through the rear emergency exit window
B.To point toward the driver's feet to monitor pedal application
C.To point directly at the ceiling to reduce interior glare
D.To show only the front passenger entryway step
Explanation: The interior mirror is positioned to monitor passenger behavior across all seat rows and provide a view through the rear window of vehicles trailing close behind.
10Why is the blind spot on the right (passenger) side of a school bus more hazardous than the left side?
A.The right side is farther from the driver's seat, making direct eye contact impossible, and children load and unload on the right
B.The right side of a school bus does not have outside rearview mirrors
C.Right-side convex mirrors are prohibited by federal regulations
D.Buses lean to the right during all braking maneuvers
Explanation: The driver sits on the far left; the right side has a wider, longer blind spot, and all passenger boarding, exiting, and curb interactions take place on the right.

About the OK CDL School Bus Exam

The Oklahoma CDL School Bus endorsement written knowledge test is administered by Service Oklahoma for drivers operating school buses transporting students. It covers Section 10 of the Oklahoma Commercial Driver License Manual: danger zones, mirror adjustment (flat, convex, crossover), safe loading and unloading procedures, emergency evacuations, student behavior management, and railroad-highway crossing safety under 47 O.S. § 11-702. OpenExamPrep provides independent English-language four-option practice questions based on the official manual and state rules. They are not an official test simulation or a substitute for hands-on vehicle training.

Exam sponsor: Service Oklahoma. The requirements and fees below concern the certification or admission exam, separate from our free practice resources.

Assessment

A computerized multiple-choice knowledge examination administered by Service Oklahoma covering Section 10 (School Buses) and Section 4 (Transporting Passengers Safely) of the Oklahoma Commercial Driver License Manual. Applicants must also hold or obtain the Passenger (P) endorsement, complete federal ELDT for school buses, hold a CLP for at least 14 days, and pass a specialized school bus road skills test in a representative school bus.

Time Limit

No time limit

Passing Score

80% (16 out of 20 questions correct)

Exam / Certification Fees

$25 for 1 exam, $30 for 2, $35 for 3, or $40 for 4 exams per session at CareerTech ServiceOK testing centers; credential and endorsement fees are separate.

Exam sponsor website

Fees, eligibility, and exam policies can change. Confirm them with the exam sponsor before applying or paying.

Our practice resources: topics covered

We aim to reflect publicly available exam outlines and topic information in our study resources. Coverage, format, and difficulty may differ from the actual exam, and we cannot guarantee that every detail is accurate or current. Confirm exam requirements, fees, and policies with the official exam sponsor.

Core Section 10 area

Danger Zones and Mirror Systems

10-foot perimeter danger zones, flat mirrors, convex mirrors, and crossover convex front mirrors.

Core Section 10 area

Loading and Unloading Procedures

Approach lights (amber and red), stop arm, 10-foot student waiting distance, street crossing, and dropped items.

Core Section 10 area

Emergency Exit and Evacuation

Mandatory evacuation criteria, exit doors and roof hatches, student leadership, and 100-foot assembly point.

Core Section 10 area

Railroad-Highway Grade Crossings

Stopping 15 to 50 feet from tracks, hazard lights, quieting the bus, opening door and window, and track clearance.

State/federal pupil transportation area

Student Management and Oklahoma Rules

Discipline procedures, zero-tolerance behavior, first aid kits, emergency equipment, and OSDE standards.

Preparing for the OK CDL School Bus Exam

What You Need to Know

  • Passing score: 80% (16 out of 20 questions correct)
  • Assessment: A computerized multiple-choice knowledge examination administered by Service Oklahoma covering Section 10 (School Buses) and Section 4 (Transporting Passengers Safely) of the Oklahoma Commercial Driver License Manual. Applicants must also hold or obtain the Passenger (P) endorsement, complete federal ELDT for school buses, hold a CLP for at least 14 days, and pass a specialized school bus road skills test in a representative school bus.
  • Time limit: No time limit
  • Exam / certification fees: $25 for 1 exam, $30 for 2, $35 for 3, or $40 for 4 exams per session at CareerTech ServiceOK testing centers; credential and endorsement fees are separate. Official sources

Using Our Practice Resources

  • Work through all 200 available questions
  • Review every answer and explanation
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OK CDL School Bus: Suggested Study Strategy

1Master the crossover mirror view: you must see the ground from the front bumper forward to where direct vision is possible, including the front bumper danger zone and both front tires.
2Memorize the loading sequence: activate amber warning lights at least 200 feet before the stop, stop at least 10 feet from waiting students, set the parking brake, and activate the red warning lights and stop arm for loading.
3Understand evacuation criteria: evacuate immediately for fire, threat of fire, danger of collision, or stalled on railroad tracks; keep students inside if the bus is in a safe location.

Frequently Asked Questions

How many questions are on the Oklahoma CDL School Bus knowledge test?

The Oklahoma CDL School Bus knowledge test consists of 20 multiple-choice questions. You must score at least 80% (16 correct answers) to pass.

Do I also need a Passenger endorsement to drive a school bus in Oklahoma?

Yes. Federal and Oklahoma CDL regulations require school bus drivers to hold both the Passenger (P) endorsement and the School Bus (S) endorsement.

What is the danger zone around an Oklahoma school bus?

The danger zone is the area extending 10 feet in all directions around the school bus, with the area immediately in front of the front bumper and around the right rear dual wheels considered the most dangerous.

What are the railroad crossing rules for school buses in Oklahoma?

Under 47 O.S. § 11-702, school bus drivers must stop between 15 and 50 feet from the nearest rail, turn on hazards, quiet the passengers, open the service door and driver window, look and listen in both directions, and never shift gears while crossing tracks.