DC · S Endorsement

District of Columbia School Bus CDL Practice Test

Below are 25 exam-style questions for the District of Columbia School Bus CDL knowledge test, modeled on the FMCSA-aligned content used by the DC Department of Motor Vehicles. Try to answer each question on your own before reading the answer key directly under it. The questions and answer choices are shuffled deterministically per state and endorsement, so the order will stay the same on repeat visits — that lets you genuinely measure your improvement.

Heads up: this is a study tool, not a graded exam. Cover the answer with your hand or a sheet of paper for an honest practice run, then re-read the explanations for any questions you missed. Aim for 22 out of 25 or better, three times in a row, before scheduling the real exam.

Question 1 of 25

A school bus must have working:

A Crossing arms, stop signal arms, and red flashing lights
B Functional emergency exits
C Pre-trip inspection completed
D All of the above

Correct answer: D

All three are required for legal operation.

Question 2 of 25

When the bus is loaded with students and you encounter a low bridge:

A Ignore it; the bus is short enough
B Honk and continue
C Drive faster to clear it quickly
D Stop and check clearance — never assume

Correct answer: D

School buses are tall; clearance must be confirmed before passing under.

Question 3 of 25

When students are loading, the bus is:

A Idling in gear
B In reverse
C Stopped with the parking brake set, transmission in neutral or park, and warning lights on
D Moving slowly

Correct answer: C

Bus must be fully stopped and secured during loading.

Question 4 of 25

When approaching a stopped vehicle on the side of the road:

A Slow down and move over if possible
B Speed up
C Maintain speed
D Honk continuously

Correct answer: A

Move-over laws apply to school buses around stopped vehicles, especially emergency vehicles.

Question 5 of 25

A school bus driver must report:

A Accidents involving the bus or students
B All of the above
C Behavior that disrupts the safety of the bus
D Mechanical defects discovered during the trip

Correct answer: B

All three reporting duties apply.

Question 6 of 25

After a school bus accident, the driver should:

A Continue the route
B Care for injured students, contact emergency services, and notify the school
C Leave students unattended
D Move the bus immediately

Correct answer: B

Student care and notification come first.

Question 7 of 25

School bus drivers should be especially aware of:

A Off-tracking on right turns
B Wide rear of the bus when changing lanes
C Tail swing when turning corners
D All of the above

Correct answer: D

Bus body movement around corners requires constant awareness.

Question 8 of 25

During winter operation, a school bus driver should:

A Use only the parking brake
B Inspect heater and defroster operation, tires, and lights for snow and ice
C Allow students to dress lightly
D Skip pre-trip in cold weather

Correct answer: B

Winter pre-trips include extra checks for heater, defroster, and traction items.

Question 9 of 25

Before crossing the tracks, the driver should:

A Roll up windows
B Open the door, turn off the radio and noisy fans, look and listen
C Honk
D Shift gears

Correct answer: B

Senses must be clear; do not shift gears while crossing.

Question 10 of 25

A bus driver should always assume:

A Children may not see or hear the bus
B All children will follow the rules
C Drivers will always stop for the red lights
D No traffic will pass while the bus is stopped

Correct answer: A

Children may dart out, may not look, and may not hear; drivers must compensate.

Question 11 of 25

When students are crossing in front of the bus, they should:

A Walk close to the bus where the driver can see them, after a hand signal from the driver
B Run across
C Cross behind the bus
D Cross at any time

Correct answer: A

Students cross 10+ feet in front of the bus on a signal from the driver, where they remain visible.

Question 12 of 25

If a student drops something near the bus, the driver should instruct the student to:

A Run to the next stop
B Pick it up quickly
C Leave it
D Stop and tell the driver before retrieving the item

Correct answer: D

Students must never reach under or around the bus without driver permission.

Question 13 of 25

During loading at the bus stop, students should:

A Walk in the bus path
B Run to the bus when it appears
C Wait at least 10 feet from the road until the bus stops and the driver signals
D Stand in the road

Correct answer: C

Students wait at a safe distance and approach only on the driver's signal.

Question 14 of 25

A school bus driver must evacuate the bus when:

A Students are noisy
B There is heavy rain
C There is a fire or danger of fire, hazmat spill, the bus is in the path of a train, or the bus position may shift
D A passenger forgot a backpack

Correct answer: C

Mandatory evacuation conditions are specifically taught in S endorsement training.

Question 15 of 25

A school bus driver should never:

A Cross a railroad track without stopping
B Move the bus until all students are seated
C Allow students to remain seated during evacuation
D All of the above

Correct answer: A

Crossing a rail without stopping is a major violation. The other answers are normal practice.

Question 16 of 25

A school bus driver must do a post-trip inspection that includes:

A Refueling
B Walking the bus to check for sleeping or hidden children, items left behind, and damage
C Disconnecting the battery
D Cleaning windows

Correct answer: B

The post-trip walk-through is mandatory to prevent leaving a child on the bus.

Question 17 of 25

When students are in the bus and you need to evacuate due to fire:

A Use the door away from the fire and lead students to a safe distance away from the bus
B Wait for the fire department
C Use only the rear door
D Open all windows first

Correct answer: A

Evacuate to a safe distance upwind of the fire.

Question 18 of 25

When a school bus is in a winter storm:

A Maintain normal speed
B Reduce speed and increase following distance, and consider chains where allowed
C Allow students to walk home
D Skip the pre-trip

Correct answer: B

Winter operations require all the standard adjustments — slower speeds, more cushion, extra inspections.

Question 19 of 25

When an evacuation requires students to walk on a roadway:

A Move them to a safe area off the road, well away from traffic
B Walk them along the lane line
C Have them stand near the bus
D Send them home individually

Correct answer: A

Move students well off the road to a safe assembly point.

Question 20 of 25

School bus drivers must keep their certification and training:

A Only at the start of the school year
B Once every 5 years
C Up to date per state and federal rules
D Only when convenient

Correct answer: C

Continuous certification is required; expired training disqualifies the driver.

Question 21 of 25

Before students approach the bus to board, the driver should:

A Honk
B Open the rear door
C Activate the alternating red lights and stop signal arm
D Roll down all windows

Correct answer: C

Use red lights and stop arm to alert traffic and signal students that it is safe to approach.

Question 22 of 25

On rural roads, a school bus driver should:

A Skip warning lights
B Maintain normal city speed
C Be especially alert at stops where students might cross the road
D Allow students to walk on the road

Correct answer: C

Rural visibility is often poor; extra caution is required at every stop.

Question 23 of 25

When students must be loaded after dark:

A Use interior dome lights and ensure exterior lights and stop arm are visible
B Skip the lights
C Use only the four-ways
D Have students load without lights

Correct answer: A

Visibility is essential at night; full lighting protects students and informs traffic.

Question 24 of 25

On a school bus, students should be seated:

A Within seatbacks and using lap belts where installed
B Standing if the bus is full
C In the driver's area
D Anywhere in the aisle

Correct answer: A

Within seatbacks; use seat belts where equipped; never standees on a school bus in motion.

Question 25 of 25

A school bus must stop at every railroad crossing:

A Between 15 and 50 feet from the nearest rail
B Only at night
C Within 5 feet of the rail
D Only when a train is visible

Correct answer: A

Federal rule applies to school buses; same as other buses required to stop.

Study tips for the District of Columbia School Bus exam

The School Bus portion of the District of Columbia CDL exam is graded out of the bank of questions the DC Department of Motor Vehicles draws from each year. While the exact bank is not published, every question is sourced from the School Bus chapter of the District of Columbia CDL handbook, which itself is derived from the FMCSA Model Commercial Driver's License Manual. That means studying our practice tests, reading the corresponding handbook chapter, and re-reading the parts you got wrong is genuinely the most efficient route to a first-time pass.

Most successful applicants follow a simple cycle: take the practice test cold, write down every question you missed, open the matching chapter of the official District of Columbia handbook, re-read the section that contains the right answer, then re-take the practice test 24 to 48 hours later. The 24-hour delay matters — sleep is when your brain commits new information to long-term memory, and CDL knowledge questions reward that kind of consolidated learning rather than cramming.

Pay particular attention to questions that include qualifier words like always, never, only, primary, or most. CDL test writers love to flip the right answer with a single qualifier. When two answer choices look almost identical, pay attention to the verb (is it must, should, or may?) and to any numbers (14 days, 100 air miles, 8 hours, 70/8 split). On endorsement tests in particular, watch for trick framing where a true statement about a different endorsement is offered as the "correct" answer to a question that is actually about School Bus.

Test-day logistics matter too. Bring photo ID, your Social Security card or birth certificate, your medical examiner's certificate (DOT card), and proof of state residency if you haven't already submitted those documents. The DC Department of Motor Vehicles will not let you sit for the knowledge exam without your documentation, and most offices charge an additional fee for re-attempts. Arrive early — the wait at most CDL testing offices runs 30 to 60 minutes — and silence your phone before the exam begins.

Finally, keep your General Knowledge fundamentals sharp even when you're focused on the School Bus exam. Many states administer multiple knowledge tests in a single sitting, and questions on weight definitions (GVWR, GCWR, GAWR), stopping distance, and the pre-trip inspection routine show up across endorsements. If you're unsure on the basics, sit a fresh District of Columbia General Knowledge practice test before scheduling the real exam.

Next steps

Missed more than four questions? Re-read the School Bus study guide and the matching chapter in the official District of Columbia CDL handbook. Then come back and re-take the test. Once you can score 22 of 25 or higher on three runs in a row, you're in good shape to schedule the real exam at your local DC Department of Motor Vehicles office.

Already comfortable with this endorsement? Drill another: DC General Knowledge · DC Air Brakes · DC Combination Vehicles · DC Hazardous Materials · DC Passenger · DC Tank Vehicle · DC Doubles / Triples

New to the CDL process in District of Columbia? Read How to apply for a CDL in District of Columbia for the document checklist and step-by-step timeline.