A yellow school bus with its stop arm out seen from the rear corner

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Free practice test · 80 original questionsFree practice · 80 questions

CDL School Bus Endorsement practice test

This free CDL school bus endorsement practice test covers the knowledge test you take on top of your CDL, with original questions written from the federal knowledge requirements in 49 CFR Part 383.

  • Multiple-choice knowledge test
  • 80% to pass (49 CFR 383.135)
  • item count set by your state
Start 20 free questions What’s inside
  • No signup to start
  • Every answer includes a source note
  • Updated October 22, 2026

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Driving & Licenses · Exam prep

CDL School Bus Endorsement practice test: how the exam works and how to prepare

Original practice questions on the school bus endorsement, written from the federal knowledge requirements in 49 CFR Part 383 and the public CDL manual facts; not official state test questions. The real CDL School Bus Endorsement test at a glance: Multiple-choice knowledge test, 80% to pass (49 CFR 383.135), item count set by your state. Use these free CDL School Bus Endorsement practice questions to learn the format and read the explanation and source note behind every answer.

80% is the federal threshold in 49 CFR 383.135. The regulation sets the percentage only — your state driver licensing agency sets how many questions the test has.

  • Learn the school bus topics in the order your state manual teaches them
  • Use the free 20 first, then work the full bank by topic and retest what you missed
  • Read every explanation, including why the wrong options fail
  • Check your state's CDL manual for local numbers and rules before test day
Official format

The real test at a glance

What it takes to pass the CDL School Bus Endorsement test

80% to pass · question count set by your state

Quick Summary: The official CDL School Bus Endorsement knowledge test requires a minimum passing score of 80%. Format: Multiple-choice knowledge test. Sourced directly from official state testing blueprints.
  • Multiple-choice knowledge test
  • 80% to pass (49 CFR 383.135)
  • item count set by your state

80% is the federal threshold in 49 CFR 383.135. The regulation sets the percentage only — your state driver licensing agency sets how many questions the test has.

80
practice questions
20
free, no signup
80%
published threshold
40
questions per simulation

Topic coverage

Topics covered in this bank

80 original questions mapped to the listed source topics. Bars show how many questions each topic gets.

Original practice questions on the school bus endorsement, written from the federal knowledge requirements in 49 CFR Part 383 and the public CDL manual facts; not official state test questions.

View full topic blueprint & drills →

Drill down by official testing module:

Loading unloading17Railroad crossings14Danger zones mirrors13Emergency evacuation12

From the question bank

Try 3 more real questions

Answer in your head, then check. Every explanation cites the official source.

  1. Q1Danger zones mirrors

    What is the danger zone around a school bus?

    1. AThe area directly under the bus where the tools and spare parts are stored
    2. BThe area inside the bus behind the driver's seat and beside the door
    3. CThe area 500 feet ahead of the bus, along the route it will follow
    4. DThe area on all sides of the bus where children are in the most danger of being hit
    Show answer

    D. The area on all sides of the bus where children are in the most danger of being hit The danger zone is where children can be hit either by another vehicle or by their own bus. It is not under the bus, inside the bus or 500 feet ahead; it is the area on all sides of the bus where students are at greatest risk, which is why you must know who is in it.

  2. Q2Danger zones mirrors

    When should you check each mirror and have it adjusted if necessary?

    1. AAfter the first stop of the route
    2. BBefore operating the school bus
    3. COnce a week
    4. DOnly when students ask
    Show answer

    B. Before operating the school bus Check each mirror before operating the bus to obtain the maximum viewing area. Waiting until after the first stop, checking once a week or adjusting only when students ask would leave blind spots, so every mirror is checked and adjusted before you operate the bus.

  3. Q3Danger zones mirrors

    How far behind the bus should the outside flat mirrors let you see when properly adjusted?

    1. A20 feet, or 1 bus length
    2. B500 feet, or 10 bus lengths
    3. C60 feet, or 2 bus lengths
    4. D200 feet, or 4 bus lengths
    Show answer

    D. 200 feet, or 4 bus lengths You should also be able to see along the sides of the bus and the rear tires touching the ground. Twenty feet, 60 feet and 500 feet are not the distance the manual gives, since a properly adjusted outside flat mirror shows 200 feet, or 4 bus lengths, behind the bus.

All 20 free questions with answers Take them as a timed quiz

Study plan

How to pass the CDL School Bus Endorsement

The order that works: learn the rules, drill until they’re automatic, then use the exam simulator to check consistency.

  1. 1

    Learn the school bus topics in the order your state manual teaches them

  2. 2

    Use the free 20 first, then work the full bank by topic and retest what you missed

  3. 3

    Read every explanation, including why the wrong options fail

  4. 4

    Check your state's CDL manual for local numbers and rules before test day

Exam simulator

Sit a timed mock test for the School Bus

One question at a time against a real countdown, no feedback until you submit, flag questions to come back to, then a score against the pass mark with a by-topic breakdown and every answer explained. Topics are mixed across the whole bank, and a retake is a new draw.

Try the free mock test

The free mock test runs 20 questions from the free set, once. Unlocking adds full-length runs of 40 questions from the whole bank. A practice mock test, not an official replica.

Free taster
20 q
Full run
40 q
Practice clock
40 min
Pass mark
80%

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  • All 80 questions, every topic
  • 40-question timed exam simulator; see the score note below
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80% is the federal threshold in 49 CFR 383.135. The regulation sets the percentage only — your state driver licensing agency sets how many questions the test has.

Free study kit

Everything free for the CDL School Bus Endorsement test

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About these questions

Written by QuizCram from the official source and verified against its text — never copied from a real exam. Original practice questions on the school bus endorsement, written from the federal knowledge requirements in 49 CFR Part 383 and the public CDL manual facts; not official state test questions.

Questions last updated
October 22, 2026
Bank version
v1 · 80 questions

Good to know

CDL School Bus Endorsement FAQ

Federal rules set the 80% passing threshold but not a question count. Each state writes its own test, so confirm the number with your state agency.

No. These are original practice questions on the school bus endorsement. Your state licensing agency writes and scores the real test, and its CDL manual is the final word on local rules.

Yes. Open the exam simulator and sit a timed mock test of 20 questions built from the free questions, once, with no signup. Unlocking the exam adds full-length runs of 40 questions in 40 minutes (a practice clock), as many as you like, each a new draw from the whole bank.

The exam's agency publishes no topic weights, so it mixes topics in proportion to the question bank, favouring questions you missed before and never repeating one within a run. A retake is a new draw, so you will meet different questions. It is a practice mock test, not an official replica of the real exam.

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