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The school bus endorsement applies to applicants who wish to drive a school bus in any Class A or B CDL. To add an S endorsement to your CLP/CDL, you must pass the Pennsylvania school bus test, and you must also pass skills tests in a school bus. The PA CDL bus test consists of 20 questions, and you'll need at least 16 correct answers to pass (80%). The knowledge test covers the following sections of the Pennsylvania CDL Manual: School Buses, Vehicle Inspection Test, Basic Control Skills Test and Road Test. After studying, take this PA CDL practice test to prepare for the actual bus test!
1. If a drawbridge does not have a signal light or traffic control attendant, you should:
stop and look to make sure the draw is completely closed before crossing.
drive through the drawbridge with caution.
stop at least 5 feet before the draw of the bridge.
get through the drawbridge as quickly as possible.
2. When changing lanes, you should check your mirrors:
After you have signaled.
After you complete the lane change.
Before you change lanes.
All of the above.
3. When driving in fog, drivers should:
use windshield washer antifreeze.
use the windshield wipers.
use high beams.
use low beams.
4. When backing, you should back and turn toward the driver's side:
so you can see the shoulder of the road.
so you can back on a curved path.
so you can see better.
so you can back in a straight line.
5. You should adjust outside mirrors:
while students get off the bus.
while students get on the bus.
before a trip begins.
during a trip.
6. When driving, you should check mirrors regularly to know where other vehicles are around you. Remember that:
there are blind spots that your mirrors cannot show you.
convex mirrors make things look larger and closer than they really are.
you should check your after the start of any trip to make sure they are properly adjusted.
every registered motor vehicle must have at least one mirror.
7. When crossing railroad tracks, you should:
shift gears while crossing the tracks.
not stop.
put the transmission in Neutral.
try to pass slower vehicles.
8. When arriving at a destination, it is best to tell passengers to take their carry-ons with them:
as they get off the bus.
at least twice.
before coming to a complete stop.
after stopping.
9. When passing a parked vehicle, which of the following is the only thing you do NOT need to watch out for?
Wheels starting to turn
Passenger door opening
Lights coming on
Driver's door opening
10. If your bus leans toward the outside on a banked curve:
you are turning too soon.
you are driving too slow.
you are braking too hard.
you are driving too fast.
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PA CDL School Bus Test

Number of questions: 20
Correct answers to pass:16
Passing score:80%
Number of questions: 20
Correct answers to pass:16
Passing score:80%
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