How many questions are on the school bus test?

Each state sets the number, but Washington and Illinois both use 20 questions. You need 16 correct to pass.

Is there a skills test for the S endorsement?

Yes. Federal rules require a knowledge test and a skills test for the school bus endorsement.

How far does the school bus danger zone extend?

Up to 30 feet in front of the bus, with the first 10 feet the most dangerous, and 10 feet from the sides and the rear.

Where should a school bus stop at a railroad crossing?

No closer than 15 feet and no farther than 50 feet from the nearest rail, with the radio off and the service door and driver's window open.

CDL School Bus Endorsement Practice Test 2026

第1题，共25题

What tests are needed for the school bus (S) endorsement?

A knowledge test and a skills test
A skills test only
A knowledge test only
No test, only a background check

显示答案

答案: A. A knowledge test and a skills test

Federal rules require both a knowledge test and a skills test for the school bus endorsement.

第2题，共25题

A CLP holder has an S endorsement on the permit. What is the limit?

School bus driving in daylight hours only
Up to 10 students, with a CDL holder aboard
No school bus driving with passengers on board
No limit once S is on the permit

显示答案

答案: C. No school bus driving with passengers on board

A CLP holder with an S endorsement is prohibited from operating a school bus with passengers.

第3题，共25题

Is entry-level driver training required for a first school bus endorsement?

Yes
Only for drivers over 65
No, only for Class A
Only for hazmat

显示答案

答案: A. Yes

ELDT is required for a first-time school bus (S) endorsement since February 7, 2022.

第4题，共25题

How far in front of the front bumper can the school bus danger zone extend?

Up to 30 feet
Up to 10 feet
Up to 100 feet
Up to 5 feet

显示答案

答案: A. Up to 30 feet

The danger zone may extend as much as 30 feet from the front bumper, with the first 10 feet the most dangerous.

第5题，共25题

Which part of the danger zone in front of the bus is most dangerous?

The first 10 feet
The area 50 feet ahead
The area beside the rear wheels
The area 20 to 30 feet out

显示答案

答案: A. The first 10 feet

The first 10 feet in front of the bumper are the most dangerous.

第6题，共25题

How far does the danger zone extend from the left and right sides of the bus?

3 feet
10 feet
30 feet
50 feet

显示答案

答案: B. 10 feet

The danger zone extends 10 feet from the left and right sides of the bus.

第7题，共25题

How far does the danger zone extend behind the rear bumper?

2 feet
30 feet
10 feet
100 feet

显示答案

答案: C. 10 feet

The danger zone extends 10 feet behind the rear bumper.

第8题，共25题

Why is the area to the left of the bus always considered dangerous?

Students always exit on the left
The driver cannot see it at all
Cars may pass the bus there
The service door is on the left

显示答案

答案: C. Cars may pass the bus there

Passing cars make the area on the left side of the bus dangerous at all times.

第9题，共25题

What is a school bus danger zone?

The stretch of road about 1 mile ahead of the bus
Any area around the bus where children are most at risk
The inside of the bus, between the seats and aisle
The school parking lot where buses line up

显示答案

答案: B. Any area around the bus where children are most at risk

Danger zones are the areas on all sides of the bus where children are in the most danger.

第10题，共25题

How should the outside flat mirrors be adjusted?

To see 20 feet behind the bus and nothing else
To see the sky above the bus and the tree tops
To see 200 feet behind, the sides, and the rear tires
To see only the front bumper and the service door

显示答案

答案: C. To see 200 feet behind, the sides, and the rear tires

Adjust the flat mirrors so you can see 200 feet or 4 bus lengths behind, the sides of the bus, and the rear tires on the ground.

第11题，共25题

How large can the blind spot directly behind a school bus be?

There is no blind spot behind a bus
It is always under 5 feet
Exactly 20 feet
It can extend up to 400 feet

显示答案

答案: D. It can extend up to 400 feet

The blind spot behind the bus is usually 50 to 150 feet and can reach 400 feet, depending on bus size.

第12题，共25题

What are the outside convex mirrors used for?

Watching the sides of the bus at a wide angle
Seeing the front bumper danger zone only
Checking the tires' tread
Seeing students inside the bus

显示答案

答案: A. Watching the sides of the bus at a wide angle

Convex mirrors are below the flat mirrors and show the left and right sides at a wide angle.

第13题，共25题

How should the outside convex mirrors be adjusted?

To see only the rear bumper and the road behind it
To see the inside of the bus, from the front seats back
To see the whole side, the rear tires, and a lane on each side
To see only the sky above the bus, for overhead clearance

显示答案

答案: C. To see the whole side, the rear tires, and a lane on each side

Convex mirrors should show the whole side of the bus, the front of the rear tires touching the ground and at least one lane beside the bus.

第14题，共25题

How do convex and crossover mirrors change what you see?

They make things look closer than they are
They show everything at its true size
They remove all the blind spots around you
They distort the size and distance of things

显示答案

答案: D. They distort the size and distance of things

These curved mirrors show more area but distort the size and distance of what you see.

第15题，共25题

What are crossover mirrors used for?

Seeing traffic far behind the bus
Checking the roof hatches and roof
Watching students at the back of the bus
Seeing the danger zone in front of the bus

显示答案

答案: D. Seeing the danger zone in front of the bus

Crossover mirrors show the front bumper danger zone, which you cannot see directly, and the area around the service door and front wheels.

第16题，共25题

How should the crossover mirrors be adjusted?

To see only the lane to the left of the bus and nothing else
To see the inside of the bus, from the driver back to the rear
To see 200 feet behind the bus along both sides of the road
To see the area in front, from the bumper to where direct view begins

显示答案

答案: D. To see the area in front, from the bumper to where direct view begins

Crossover mirrors should cover the area from the front bumper at ground level to where you can see directly. The views should overlap.

第17题，共25题

What should you be able to see in the overhead inside mirror?

The right front tire and the curb beside the bus
The top of the rear window and all students, even those behind you
Traffic about 200 feet behind the bus in both lanes
The front bumper and the area just in front of the bus

显示答案

答案: B. The top of the rear window and all students, even those behind you

Adjust the inside mirror to see the top of the rear window and all students, including the heads of students right behind you.

第18题，共25题

Where are the blind spots of the overhead inside mirror?

In front of the bus, near the front bumper
On the roof, above the emergency hatches
Right behind your seat, and far behind the rear bumper
There are none if the mirror is adjusted

显示答案

答案: C. Right behind your seat, and far behind the rear bumper

Use the outside mirrors to watch traffic in the area behind the bus that the inside mirror cannot show.

第19题，共25题

When should you turn on the flashing amber warning lights before a stop?

At least 200 feet or 5 to 10 seconds before the stop
About 1 mile or 2 minutes before the stop
Only after the bus has come to a full stop
Only if traffic behind the bus is heavy

显示答案

答案: A. At least 200 feet or 5 to 10 seconds before the stop

Turn on the alternating amber lights at least 200 feet or about 5 to 10 seconds before the stop, or as your state requires.

第20题，共25题

When approaching a bus stop, about when should you turn on the right turn signal?

Never; signals are not used at stops
Only after you have stopped the bus
About 100 to 300 feet before pulling over
About 1,000 feet before the stop

显示答案

答案: C. About 100 to 300 feet before pulling over

Turn on the right signal about 100 to 300 feet, or 3 to 5 seconds, before pulling over.

第21题，共25题

How far from students waiting at a stop should the front bumper be when you stop?

At least 10 feet away
As close as possible
At least 100 feet away
About 2 feet away

显示答案

答案: A. At least 10 feet away

Stop with the front bumper at least 10 feet away from students, so they must walk to the bus.

第22题，共25题

At each stop, what should you do with the transmission and parking brake?

Shift to reverse and release the parking brake
Shift to Park (or Neutral) and set the parking brake
Shift to Neutral and release the parking brake
Keep it in gear and hold the brake pedal down

显示答案

答案: B. Shift to Park (or Neutral) and set the parking brake

Place the transmission in Park, or Neutral if there is no Park, and set the parking brake at each stop.

第23题，共25题

When should you turn on the alternating red lights and extend the stop arm?

Only after the students have boarded
When traffic is a safe distance away
As soon as you see the stop ahead
After you start to pull away

显示答案

答案: B. When traffic is a safe distance away

Activate the red lights when traffic is at a safe distance, then make a final check that traffic has stopped before opening the door.

第24题，共25题

How should students board the bus?

Two or three at a time, side by side
Slowly, single file, using the handrail
Quickly, running to save time
Through the rear emergency door

显示答案

答案: B. Slowly, single file, using the handrail

Students board slowly in single file and use the handrail. Keep the dome light on when loading in the dark.

第25题，共25题

When can you move the bus after students board?

When all students are seated and facing forward
When the last student reaches the steps
As soon as the door closes
While students are walking to seats

显示答案

答案: A. When all students are seated and facing forward

Wait until students are seated and facing forward before moving.

CDL School Bus Endorsement Practice Test 2026

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