Practice questions written from the official CDL manual. Correct answers and explanations are shown below each question. (Turn on JavaScript for the interactive practice and exam-simulation modes.)
1. What is the "danger zone" around a school bus?
- AOnly the area behind the bus where the driver cannot see
- BThe space between the bus and the curb at a stop
- CThe area on all sides of the bus where students are in the most danger of being hitCorrect
- DThe lane of traffic that must stop for the bus
Why: The danger zone is the area immediately around the bus — front, sides, and rear — where children are at the greatest risk of being struck, either by the bus itself or by passing traffic. Knowing where these zones are is the first step to keeping students safe.
Based on: CDL Manual §10.1 — Danger Zones and Use of Mirrors
2. How far can the danger zone extend out from the front bumper of a school bus?
- AAs much as 10 feet
- BAs much as 30 feet, with the first 10 feet being the most dangerousCorrect
- CAs much as 50 feet
- DExactly 15 feet
Why: The danger zone in front can reach as far as 30 feet ahead of the bus, and the first 10 feet is the most dangerous of all. A child standing close to the front bumper can drop below the driver's line of sight entirely, so students must always stay well ahead where the driver can see them.
Based on: CDL Manual §10.1 — Danger Zones and Use of Mirrors
3. How far do the danger zones extend along the left and right sides and behind a school bus?
- A10 feet from the sides and 10 feet behind the rear bumperCorrect
- B30 feet from the sides and 30 feet behind
- C5 feet from the sides and 15 feet behind
- D1 bus length on every side
Why: The danger zone reaches about 10 feet out from the left and right sides of the bus and 10 feet behind the rear bumper. Students should never linger in these areas, because much of this space is hard or impossible for the driver to see directly.
Based on: CDL Manual §10.1 — Danger Zones and Use of Mirrors
4. Which part of the danger zone in front of the bus is the most dangerous for students?
- AThe area 20 to 30 feet ahead
- BThe far edge of the danger zone
- CThe area under the front bumper only
- DThe first 10 feet directly in front of the busCorrect
Why: The first 10 feet directly in front of the bus is the most dangerous part of the front danger zone. A small child standing there can disappear below the hood, out of the driver's direct view — which is why crossover mirrors and keeping students far ahead are so important.
Based on: CDL Manual §10.1 — Danger Zones and Use of Mirrors
5. When is a school bus driver's job the most dangerous?
- AWhile driving on the highway between stops
- BWhile performing the pre-trip inspection
- CDuring the loading and unloading of studentsCorrect
- DWhile fueling the bus
Why: Loading and unloading is the most dangerous part of the job. More students are killed getting on or off the bus — or crossing the road near it — than in any other situation. This is why the danger zones, mirror checks, and crossing procedures matter so much.
Based on: CDL Manual §10.2 — Loading and Unloading
6. When students step off the bus, how far should they move away from its side before it is safe for the bus to move?
- AJust past the doorway
- BAt least 10 feet away, to a spot where the driver can plainly see themCorrect
- CRight against the side of the bus so they stay out of traffic
- DAbout 30 feet, but only if crossing the road
Why: Students should walk at least 10 feet away from the side of the bus to a place where the driver can plainly see them. Staying close to the bus puts them in a blind spot inside the danger zone, where the driver could pull away without seeing them.
Based on: CDL Manual §10.2 — Loading and Unloading
7. When students must cross the road after getting off the bus, where should they cross?
- AIn front of the bus, far enough ahead that the driver can see themCorrect
- BBehind the bus, out of oncoming traffic's way
- CDirectly beside the service door
- DWherever is closest to their home
Why: Students who must cross should always cross in front of the bus — never behind it — and far enough ahead (about 10 feet) that the driver can clearly see them. Crossing behind the bus hides them from the driver and from passing traffic.
Based on: CDL Manual §10.2 — Loading and Unloading
8. Before a student crosses the road in front of the bus, the student should:
- ARun across quickly before traffic arrives
- BCross as soon as the red lights come on
- CFollow the student behind them across
- DWait for the driver's signal that it is safe to crossCorrect
Why: Students should walk far enough ahead to be seen, then wait for the driver's signal before crossing. Using a consistent, agreed-upon signal lets the driver check for traffic first and tell each student exactly when it is safe to cross the road.
Based on: CDL Manual §10.2 — Loading and Unloading
9. What should a driver do to keep track of students at a bus stop?
- AAssume all students boarded if no one is waiting
- BOnly count students on the morning route
- CCount the students at the stop and make sure they all boardCorrect
- DLet the students count themselves
Why: The driver should count the number of students at the stop and be sure they all get on the bus. Keeping an accurate count — loading and unloading — is how a driver knows every student is safely accounted for and none are still in a danger zone.
Based on: CDL Manual §10.5 — Student Management
10. After unloading, a driver cannot account for one of the students. What should the driver do?
- ADrive the route again to look for the student
- BSecure the bus, take the key, and check around and underneath the busCorrect
- CContinue the route and report it at the school
- DHonk the horn and wait for the student to appear
Why: If a student is missing, the driver should secure the bus, take the key, and check carefully around and underneath the bus before moving. A small child may have dropped something or fallen into a blind spot in the danger zone where the driver cannot see them from the seat.
Based on: CDL Manual §10.2 — Loading and Unloading
11. A student drops something near or under the bus while in the danger zone. What should the student be taught to do?
- ALeave the object, move to a point of safety, and get the driver's attentionCorrect
- BQuickly reach under the bus to grab it
- CAsk another student to pick it up
- DWait beside the bumper until the driver notices
Why: Students should be told to leave a dropped object where it is, move out of the danger zone to a safe spot, and get the driver's attention before retrieving it. Bending down near the bus puts a child in a blind spot where the driver could pull away without seeing them.
Based on: CDL Manual §10.2 — Loading and Unloading
12. What are the crossover mirrors on a school bus used for?
- AWatching traffic approaching from far behind the bus
- BChecking the driver's own blind spot over the shoulder
- CSeeing inside the passenger compartment
- DSeeing the danger zone directly in front of the bus and the area around the service doorCorrect
Why: Crossover mirrors, mounted at the front corners, let the driver see the front danger zone that cannot be seen by looking directly ahead, plus the area near the service door and front wheels. They are essential for spotting a small child standing close to the front bumper.
Based on: CDL Manual §10.1 — Danger Zones and Use of Mirrors
13. What is a limitation of the convex (curved) outside mirrors on a school bus?
- AThey only work at night
- BThey show a wide view, but objects appear smaller and farther away than they really areCorrect
- CThey cannot be adjusted once mounted
- DThey only show the inside of the bus
Why: Convex mirrors, mounted below the flat mirrors, give a wide-angle view of the sides of the bus — but they distort the image so that people and objects look smaller and farther away than they actually are. Drivers must keep this distortion in mind when judging distances.
Based on: CDL Manual §10.1 — Danger Zones and Use of Mirrors
14. How should the outside left and right flat mirrors be adjusted?
- ATo see only the rear tires of the bus
- BTo point straight down at the ground beside the bus
- CTo see along the sides of the bus and about 200 feet (roughly 4 bus lengths) behind itCorrect
- DTo see the front danger zone directly ahead
Why: The flat outside mirrors should be set to monitor traffic, check clearances, and watch students along the sides and to the rear — giving a view of about 200 feet, or roughly four bus lengths, behind the bus. They are the main mirrors for seeing following and passing traffic.
Based on: CDL Manual §10.1 — Danger Zones and Use of Mirrors
15. What is the purpose of the alternating flashing amber (yellow) warning lights?
- ATo warn approaching traffic that the bus is about to stop to load or unloadCorrect
- BTo tell students it is safe to cross the road
- CTo signal that the bus has broken down
- DTo require all traffic to stop immediately
Why: The amber warning lights are activated before the bus stops to warn other drivers that it is about to stop for loading or unloading. They give traffic time to slow down and prepare to stop before the red lights come on.
Based on: CDL Manual §10.2 — Loading and Unloading
16. When should the alternating flashing red lights and the stop arm be used?
- AAny time the bus is moving slowly
- BOnly during the morning route
- CWhile driving through a school zone
- DWhen the bus is stopped to load or unload studentsCorrect
Why: The red flashing lights and the extended stop arm are used once the bus is stopped to load or unload students. They legally require traffic in both directions (as state law provides) to stop, protecting students as they get on, get off, and cross the road.
Based on: CDL Manual §10.2 — Loading and Unloading
17. At a railroad-highway crossing, how far from the nearest rail should a school bus stop?
- AAs close as possible to the rail
- BNo closer than 15 feet and no farther than 50 feet from the nearest railCorrect
- CExactly 100 feet from the rail
- DBetween 5 and 10 feet from the rail
Why: A school bus must stop no closer than 15 feet and no farther than 50 feet from the nearest rail. This range keeps the bus a safe distance from passing trains while still giving the driver a clear view down the tracks in both directions.
Based on: CDL Manual §10.4 — Railroad-Highway Crossings
18. After stopping at a railroad crossing, what should the driver do before crossing?
- ATurn up the radio and roll forward slowly
- BHonk the horn and cross immediately
- CSilence the bus, open the service door and driver's window, then look and listenCorrect
- DAsk a student to check the tracks
Why: The driver should quiet the bus (turn off fans and radios, keep students silent), open the service door and driver's window, and then look and listen carefully for a train before crossing. An approaching train can often be heard before it is seen.
Based on: CDL Manual §10.4 — Railroad-Highway Crossings
19. How should a school bus cross the railroad tracks once the way is clear?
- AIn a low gear, without changing gears while crossingCorrect
- BIn the highest gear to cross quickly
- CShifting gears halfway across to build speed
- DIn neutral, coasting across
Why: The bus should cross in a low gear and the driver must not change gears while on the tracks. Shifting risks the engine stalling or the bus losing momentum, which could leave it stuck on the tracks in the path of a train.
Based on: CDL Manual §10.4 — Railroad-Highway Crossings
20. Which situation requires the driver to evacuate the school bus?
- AA student feels carsick
- BThe bus is running a few minutes late
- CA tire is low on air
- DThe bus is stalled on or next to a railroad-highway crossingCorrect
Why: Evacuation is mandatory when the bus is on fire or threatens to catch fire, when it is stalled on or near a railroad crossing, when a collision is imminent, or when a hazardous materials spill is present. In these cases, staying on the bus is more dangerous than getting off.
Based on: CDL Manual §10.3 — Emergency Exit and Evacuation
21. When students are evacuated from the bus, where should they be led?
- ATo a spot right beside the bus doors
- BTo a safe place at least 100 feet off the road, upwind if there is a fireCorrect
- CBack onto the bus once traffic passes
- DOnly as far as the edge of the pavement
Why: Evacuated students should be moved to a safe location at least 100 feet off the road, and upwind of the bus if there is a fire so smoke and flames blow away from them. Keeping the group together and well clear of traffic and the bus is the goal.
Based on: CDL Manual §10.3 — Emergency Exit and Evacuation
22. Which of these is an emergency exit a driver may use to evacuate a school bus?
- AThe engine compartment
- BThe luggage bay under the floor
- CRear or side emergency doors, roof hatches, and windowsCorrect
- DThe driver's seat opening only
Why: Depending on the emergency, a driver can evacuate through the front service door, rear or side emergency doors, roof hatches, or push-out windows. The driver chooses the exits that are safest for the situation — for example, avoiding a door blocked by fire or traffic.
Based on: CDL Manual §10.3 — Emergency Exit and Evacuation
23. During emergency braking on a bus equipped with antilock brakes (ABS), the driver should:
- AApply firm, steady pressure and not pump the brakesCorrect
- BPump the brake pedal rapidly
- CPull the parking brake instead
- DShift into a lower gear before touching the brakes
Why: With ABS, the driver should brake firmly and steadily and let the system prevent the wheels from locking — do not pump the pedal. Pumping defeats the antilock system. If the ABS ever fails, the bus still has normal brakes, so the driver can keep driving and brake as usual.
Based on: CDL Manual §10.6 — Antilock Braking Systems (ABS)
24. What does the CDL manual say about backing a school bus?
- AIt is the preferred way to reposition at a stop
- BIt is fine as long as the horn is sounded
- CIt may be done freely when students are boarding
- DIt is strongly discouraged; if you must back, use a lookout and never back when students are outsideCorrect
Why: Backing a school bus is strongly discouraged because the rear is a large blind spot. If backing cannot be avoided, the driver should post a lookout to guide them, and should never back up while students are outside the bus. When no lookout is available, the driver should walk to the rear to make sure the way is clear.
Based on: CDL Manual §10.7 — Special Safety Considerations
25. Why must a driver rely on the crossover mirrors instead of looking straight ahead at students near the front bumper?
- ALooking ahead fogs the windshield
- BThe area directly in front of the bus is a blind spot that cannot be seen by direct visionCorrect
- CCrossover mirrors show traffic far behind the bus
- DDirect vision is only used at night
Why: The space right in front of the bus — the most dangerous 10 feet of the front danger zone — is a blind spot the driver cannot see by looking straight ahead over the hood. The crossover mirrors are angled to reveal that hidden area so the driver can spot a child before moving.
Based on: CDL Manual §10.1 — Danger Zones and Use of Mirrors