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Massachusetts CDL School Bus Test study materials
Massachusetts CDL School Bus Test study resources

Massachusetts CDL School Bus Test practice questions

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Question 1School Bus Danger Zones and Loading/Unloading Students

Under federal CDL rules, how far from a stopped school bus that is loading or unloading students must a driver in the opposite direction on an undivided two-lane road stop?

  1. At least 200 feet
  2. At least 50 feet
  3. At least 100 feet Correct answer.
  4. At least 10 feet

Explanation

On an undivided roadway, traffic approaching from either direction must stop at least 10 feet from the bus when its red lights are flashing. Most state manuals teach drivers to stop about 100 feet away so students and the bus are clearly visible.

Question 2School Bus Danger Zones and Loading/Unloading Students

A school bus driver is preparing to unload students on a road with a posted speed limit of 40 mph. How should the driver position the bus before opening the door?

  1. Pull to the right edge of the roadway, close to the curb or shoulder Correct answer.
  2. Stop in the left lane so students cross the whole road
  3. Stop diagonally across the lane to block traffic
  4. Stop in the travel lane with the hazard lights on

Explanation

The bus should be pulled as far to the right as practical so students step onto the shoulder or curb and stay out of the travel lane. Blocking or angling across the lane exposes students to moving traffic and confuses other drivers.

Question 3School Bus Danger Zones and Loading/Unloading Students

When students must cross the road after leaving the bus, what is the driver's required procedure?

  1. Have them walk to a point at least 10 feet ahead of the bus and cross only on the driver's signal Correct answer.
  2. Have them cross behind the bus where traffic cannot see them
  3. Signal them to cross quickly while traffic is stopped
  4. Let them cross wherever they exit as long as the red lights are flashing

Explanation

Students should walk forward along the shoulder to a spot at least 10 feet in front of the bus, where the driver can see them, and cross only after the driver signals. Crossing in front keeps them in the driver's view and out of the bus's blind spots.

Question 4School Bus Danger Zones and Loading/Unloading Students

Which area around a school bus is generally the most dangerous blind spot for the driver?

  1. The left rear corner at 20 feet
  2. The center of the roadway behind the bus at 50 feet
  3. Directly in front of the front bumper and to the right side near the door Correct answer.
  4. Straight ahead 100 feet down the road

Explanation

The zone immediately in front of the bumper and along the right side by the service door is where the driver's view is most limited. Students waiting or crossing there can disappear from view even with mirrors adjusted properly.

Question 5School Bus Danger Zones and Loading/Unloading Students

A school bus is stopped with red lights flashing on a divided highway with a physical median separating the directions. What must a driver approaching from the opposite side of the median do?

  1. Stop and wait until the bus door closes
  2. Stop at least 10 feet from the bus
  3. Slow to 20 mph and pass carefully
  4. Continue driving without stopping Correct answer.

Explanation

When a physical median or barrier separates opposing traffic, vehicles on the other side are not required to stop for the bus's red lights. Traffic on the same side as the bus must still stop.

Question 6School Bus Danger Zones and Loading/Unloading Students

While loading students, the driver counts them and loses track of one child. What is the safest immediate action?

  1. Walk the danger zones and check under and around the bus before moving Correct answer.
  2. Ask the remaining students to look out the windows
  3. Honk and wait for the child to reappear
  4. Close the door and drive on, assuming the child went home

Explanation

If a student cannot be accounted for, the driver must secure the bus and physically check the danger zones, including under and around the vehicle. Never move the bus until every student is located.

Question 7School Bus Danger Zones and Loading/Unloading Students

How should a school bus driver use the hand signal when students cross in front of the bus?

  1. Point at the crossing point and hold the arm out until the student reaches the far side Correct answer.
  2. Signal only after the student has already started crossing
  3. Wave the student across quickly with a single motion
  4. Tap the horn twice instead of signaling

Explanation

The driver points to the crossing spot and keeps the arm extended until the student has safely reached the other side. A sustained signal shows the student the crossing is protected and lets other drivers see the driver's intent.

Question 8School Bus Danger Zones and Loading/Unloading Students

A driver in the same direction as a stopped school bus sees the amber warning lights flashing but not yet the red lights. What should the driver do?

  1. Prepare to stop because the bus is about to load or unload Correct answer.
  2. Continue at the same speed until the red lights appear
  3. Accelerate to pass before the red lights come on
  4. Stop immediately in the travel lane

Explanation

Amber lights warn that the bus is slowing to stop and red lights will follow. Drivers should slow down and prepare to stop rather than trying to beat the red lights.

Question 9School Bus Danger Zones and Loading/Unloading Students

Where should students who are waiting to board the bus stand?

  1. On the shoulder or sidewalk, back from the curb, until the driver signals Correct answer.
  2. In a line in the travel lane behind the bus
  3. Directly in front of the bus bumper
  4. At the edge of the roadway near the door

Explanation

Students should wait well back from the roadway on the shoulder or sidewalk and approach only when the driver signals. Standing back keeps them out of the danger zone and out of the path of traffic.

Question 10School Bus Danger Zones and Loading/Unloading Students

A school bus driver is dropping off a student on the left side of a two-way street. Which practice is correct?

  1. Let the student cross the street alone behind the bus
  2. Let the student exit on the left into traffic
  3. Have the student crawl under the bus to the right side
  4. Avoid unloading on the left side; if unavoidable, escort the student across Correct answer.

Explanation

Students should normally be unloaded on the side where they do not have to cross traffic. If a left-side drop is unavoidable, the driver must escort the student across and control the crossing.

Question 11School Bus Danger Zones and Loading/Unloading Students

What is the purpose of the danger zone around a school bus?

  1. To identify the area where students are at greatest risk from the bus and traffic Correct answer.
  2. To mark the area where the bus may park overnight
  3. To show where the bus may exceed the speed limit
  4. To define the space reserved for bus maintenance

Explanation

The danger zone is the area immediately around the bus where students are most exposed to being hit by the bus or by other traffic. Drivers must control this area during loading and unloading.

Question 12School Bus Danger Zones and Loading/Unloading Students

A car is approaching a stopped school bus from behind on a road with two lanes in each direction and no median. What must the car driver do?

  1. Pass in the left lane while the bus is stopped
  2. Honk to warn the bus driver and continue
  3. Slow to 15 mph and pass on the right
  4. Stop and remain stopped until the red lights stop flashing Correct answer.

Explanation

On an undivided multi-lane road, all traffic in both directions must stop for a school bus with flashing red lights. The car must stay stopped until the lights stop and students are clear.

Question 13School Bus Danger Zones and Loading/Unloading Students

When is a school bus driver permitted to turn off the red flashing lights and resume driving after unloading?

  1. After counting the students and confirming all are clear of the danger zone Correct answer.
  2. As soon as the door closes
  3. When the last student steps off the bus
  4. Once the bus has started rolling forward

Explanation

The driver must account for every student and confirm none are in the danger zone before deactivating the red lights and moving. The door closing alone does not prove students are clear.

Question 14School Bus Danger Zones and Loading/Unloading Students

Why does a school bus driver flash the headlights or use the horn before backing?

  1. To warn nearby students and pedestrians that the bus is about to move backward Correct answer.
  2. To signal students to run toward the bus
  3. To request that traffic stop in both directions
  4. To test that the horn is working

Explanation

Backing a school bus is avoided whenever possible; when necessary, the driver warns others with the horn or lights before moving. This gives students and pedestrians time to clear the area behind the bus.

Question 15School Bus Danger Zones and Loading/Unloading Students

A student drops a book in the roadway after exiting the bus and bends to pick it up. What should the driver do?

  1. Honk and drive around the student
  2. Open the door and tell the student to hurry
  3. Pull forward slowly to clear the area
  4. Keep the bus stopped and wait until the student is clear of the roadway Correct answer.

Explanation

The bus must remain stopped until the student is completely clear of the roadway and danger zone. Moving or driving around a student in the road risks a fatal accident.

Question 16School Bus Danger Zones and Loading/Unloading Students

Which mirrors should a school bus driver check before moving after a student drop-off?

  1. Only the right mirror
  2. Only the left mirror
  3. All mirrors, including crossover and side mirrors, to cover the danger zones Correct answer.
  4. Only the interior rearview mirror

Explanation

The driver must scan all mirrors, including crossover mirrors that show the area directly in front of the bus, to verify no student is in any danger zone. Checking only one mirror leaves blind spots unchecked.

Question 17School Bus Danger Zones and Loading/Unloading Students

A school bus stops on a hill to unload students. What special precaution applies?

  1. Leave the bus in neutral with the engine running
  2. Unload quickly so the bus does not roll
  3. Have students cross in front on the downhill side
  4. Set the parking brake and chock the wheels before opening the door Correct answer.

Explanation

On a grade, the parking brake must be set and the wheels secured so the bus cannot roll while students are outside. Students should also be kept clear of the downhill path of the bus.

Question 18School Bus Danger Zones and Loading/Unloading Students

Why is it especially dangerous for a student to cross in front of the bus too close to the bumper?

  1. The student may be below the driver's line of sight and outside the crossover mirror view Correct answer.
  2. The student may set off the bus alarm
  3. The student may block the door
  4. The student may trip on the bumper

Explanation

A student who crosses too close to the front bumper can drop below the driver's view even with crossover mirrors. That is why students are taught to walk at least 10 feet ahead before crossing.

Question 19School Bus Danger Zones and Loading/Unloading Students

A driver is following a school bus that has stopped with red lights flashing on a road with a raised concrete median. The driver is on the same side as the bus. What must the driver do?

  1. Change lanes and pass slowly
  2. Continue past because a median exists
  3. Stop only if children are visible
  4. Stop and wait until the red lights stop Correct answer.

Explanation

A median only exempts traffic on the opposite side of the roadway. Traffic traveling in the same direction as the bus must still stop for the flashing red lights.

Question 20School Bus Danger Zones and Loading/Unloading Students

During unloading, the driver's attention is divided between the students and a parent who walks up to the door. What is the correct approach?

  1. Keep control of the loading zone and complete the student count before addressing the parent Correct answer.
  2. Finish the conversation with the parent before counting students
  3. Let the parent board the bus to talk
  4. Open the door and continue the count while talking

Explanation

The driver must maintain uninterrupted control of the danger zone and finish counting students before any distraction is handled. A parent conversation can wait until the students are accounted for and the zone is clear.

Question 21School Bus Danger Zones and Loading/Unloading Students

What does a school bus driver do with the stop arm and red lights when stopping to load students?

  1. Extend the stop arm only on highways
  2. Keep the stop arm retracted to avoid damage
  3. Extend the stop arm and activate red lights before students approach Correct answer.
  4. Activate red lights only after students are aboard

Explanation

The stop arm and red lights must be deployed before students approach so traffic is warned and stopped. They stay active until loading is complete and students are clear.

Question 22School Bus Danger Zones and Loading/Unloading Students

A student is walking away from the bus along the right shoulder. What should the driver do before moving?

  1. Sound the horn to make the student walk faster
  2. Wait until the student is well clear of the bus and the danger zone Correct answer.
  3. Move slowly behind the student
  4. Move as soon as the student is 5 feet away

Explanation

The driver should wait until the student is a safe distance away and out of the danger zone before moving. Following closely behind a walking student risks striking them if they turn or stumble.

Question 23School Bus Danger Zones and Loading/Unloading Students

Which statement best explains why school bus drivers are trained to count students twice during unloading?

  1. To satisfy paperwork requirements
  2. To confirm that every student who exited is accounted for and clear of the danger zone Correct answer.
  3. To decide which students ride again
  4. To measure how long unloading takes

Explanation

Counting before and after unloading verifies that each student is accounted for and no child remains in or near the bus. This simple check prevents leaving a student behind in a blind zone.

Question 24School Bus Danger Zones and Loading/Unloading Students

A driver on a four-lane road with a painted yellow line separating directions approaches a stopped school bus with red lights flashing. What is required?

  1. Stop, because a painted line is not a physical median Correct answer.
  2. Continue, because there are four lanes
  3. Stop only if the bus is in the right lane
  4. Slow to 25 mph and pass

Explanation

A painted line does not create the physical separation that exempts opposing traffic. On an undivided four-lane road, traffic in both directions must stop for the bus's red lights.

Question 25School Bus Danger Zones and Loading/Unloading Students

When a school bus is loading students, at what point should the driver open the service door?

  1. While the bus is still rolling slowly
  2. After the stop arm is retracted
  3. After stopping, setting the brake, and confirming students are waiting in a safe spot Correct answer.
  4. As soon as the bus comes to a complete stop, before checking traffic

Explanation

The door should open only after the bus is fully stopped, secured, and students are waiting in a safe location. Opening early invites students to approach a moving vehicle.

Question 26School Bus Danger Zones and Loading/Unloading Students

Where does the danger zone around a stopped school bus extend in relation to the vehicle?

  1. Only in front of the bus, within the area covered by the crossing gate
  2. Only directly behind the rear bumper, where the exhaust and blind spot are worst
  3. From the service door to the nearest curb, plus the roadway lane the bus occupies
  4. From the front bumper outward about 10 feet, from the rear bumper outward about 10 feet, and along both sides Correct answer.

Explanation

The danger zone is the area immediately surrounding a stopped school bus where students are hardest for the driver to see and where passing traffic is closest. Training places it roughly 10 feet in front of the bumper, 10 feet behind the rear bumper, and along both sides of the bus. Students inside that band are at greatest risk, which is why they are taught to move clear of it before the driver releases the parking brake.

Question 27School Bus Danger Zones and Loading/Unloading Students

A driver is about to unload students at a stop where the bus is parked along the right curb. Which action best keeps students out of the danger zone as they leave?

  1. Allow students to cross the street at the rear of the bus where traffic has already passed
  2. Release students to walk behind the bus toward their homes on the same side of the street
  3. Have students exit, walk forward past the crossing gate, and wait on the sidewalk until the driver signals them to cross Correct answer.
  4. Let students step off and walk along the right side of the bus close to the wheels to reach the curb

Explanation

Students who must cross should go to the front of the bus, pass beyond the crossing gate, and wait for the driver's signal before entering the roadway. Walking them in front keeps them inside the driver's view and out of the rear and side blind spots. Waiting on the sidewalk first lets the driver confirm the traffic situation before releasing them.

Question 28School Bus Danger Zones and Loading/Unloading Students

A school bus driver is preparing to unload at a stop and sees several students already running toward the door from the sidewalk. What is the correct sequence of actions?

  1. Sound the horn to stop the running students, then open the door before setting the parking brake
  2. Keep the engine running in gear with the door open and motion students to hurry so the stop is brief
  3. Open the door while the bus is still rolling slowly so students can begin stepping aboard and save time
  4. Stop the bus, set the parking brake, place the transmission in neutral or park, and only then open the door and signal students to wait until the driver is ready Correct answer.

Explanation

The bus must be fully secured before the door opens: stopped, parking brake set, and the transmission in neutral or park. Only after that should the driver open the door and control the students. Opening the door early invites students to approach a bus that is not yet stationary or secured.

Question 29School Bus Danger Zones and Loading/Unloading Students

Why must a school bus driver keep students visible in the mirrors and count them at the stop before releasing the parking brake?

  1. Because the mirror check is mainly a way to verify that the stop arm retracted fully
  2. Because a student who is not accounted for may still be in the danger zone, where the driver cannot see them from the seat Correct answer.
  3. Because the count is required only to record ridership numbers for the transportation office
  4. Because counting confirms that each student has paid the fare for the trip

Explanation

The purpose of counting and mirror checks is safety: any student unaccounted for may be lingering in a blind spot in front of, behind, or beside the bus. Until every student is confirmed clear of the danger zone, moving the bus could injure someone the driver cannot see. Ridership records and equipment checks are separate concerns and do not justify releasing the brake.

Question 30School Bus Danger Zones and Loading/Unloading Students

A driver unloads students at a stop where the bus must be backed up a short distance to clear a driveway before departing. Which combination of practices is correct?

  1. Back up while students are still walking away along the right shoulder, using the mirrors to track them
  2. Have students stand in front of the bus to guide the driver backward, then board again after the maneuver
  3. Unload first so students can clear the area, then back up without a spotter because the students have already left
  4. Unload only after backing is complete, use a spotter if one is available, and sound the horn before backing with the windows open to listen Correct answer.

Explanation

Whenever possible, backing should be completed before students are unloaded so no child is near the bus during the maneuver. If backing is unavoidable, the driver uses a spotter when available, sounds the horn, and keeps windows open to listen for warnings. Students should never be used as guides or left near the bus while it moves in reverse.

Question 31School Bus Pre-Trip Inspection and Vehicle Condition

During a pre-trip inspection of a Massachusetts school bus, you check the alternator belt. Which condition requires the bus to be placed out of service until repaired?

  1. The belt deflects about one-half inch under firm thumb pressure
  2. The belt has slight surface glazing but no cracking and correct tension
  3. The belt is frayed with a deep crack across its width Correct answer.
  4. The belt shows minor dust buildup on the pulley side

Explanation

A belt that is frayed or deeply cracked can fail completely, which would stop the alternator from charging and could leave students stranded or disable warning systems. Any belt with cuts, fraying, or missing chunks must be replaced before the bus is dispatched. Minor glazing, dust, and normal deflection are acceptable during inspection.

Question 32School Bus Pre-Trip Inspection and Vehicle Condition

While inspecting the brake system on a school bus, you find that the low air pressure warning signal fails to activate when pressure drops. What is the correct response?

  1. Tag the bus out of service until the warning system is repaired Correct answer.
  2. Continue only if the route stays under 25 mph
  3. Pump the brakes several times to test the gauge again
  4. Note it on the inspection report and complete the route

Explanation

The low pressure warning must activate before pressure falls below the required threshold so the driver has time to stop safely. A failed warning device removes that safety margin and makes the bus unserviceable. Federal and state inspection standards require the defect be corrected before the vehicle carries passengers.

Question 33School Bus Pre-Trip Inspection and Vehicle Condition

When checking the emergency exit doors on a school bus during pre-trip inspection, which item must be verified?

  1. The door glass is tinted darker than the side windows
  2. The door latch requires a key to release from the inside
  3. The door hinges are painted the same color as the body
  4. The door opens freely from the inside and the buzzer sounds when opened Correct answer.

Explanation

Emergency exits must open easily from the inside without tools, and the warning buzzer must alert the driver whenever an exit is unlatched. This ensures students can evacuate quickly and the driver knows if a door is not secure. Tint, paint color, and keyed latches are not valid inspection criteria and a keyed inside latch would actually be a hazard.

Question 34School Bus Pre-Trip Inspection and Vehicle Condition

You are inspecting the tires on a school bus before a morning run. Which finding makes the bus unserviceable?

  1. Tread depth of 6/32 inch on the front steer tires
  2. A cut that exposes the fabric cord in the tread area Correct answer.
  3. Tire pressure matching the placard on all positions
  4. Valve stem caps installed on all wheels

Explanation

Any cut, crack, or snag deep enough to expose body cords or fabric means the tire has lost structural integrity and can fail at highway speed. Such a tire must be replaced before the bus is used. Adequate tread depth, correct inflation, and installed valve caps are all acceptable conditions.

Question 35School Bus Pre-Trip Inspection and Vehicle Condition

During the exterior inspection, you check the school bus stop arm. What must happen when the stop arm is deployed?

  1. The red lights activate and the arm extends fully from the left side Correct answer.
  2. The arm extends only when the parking brake is released
  3. The arm deploys whenever the driver's door is opened
  4. The arm extends from the right side and the headlights flash

Explanation

The stop arm works together with the flashing red lights so traffic in both directions is warned while students cross. The arm extends from the driver's side, the left side of the bus, and the red lamps must flash simultaneously. Deployment is controlled by the driver's switch, not by the door or parking brake.

Question 36School Bus Pre-Trip Inspection and Vehicle Condition

While checking the engine compartment, you notice the power steering fluid is below the minimum mark and there is fluid on the ground under the bus. What does this indicate?

  1. The steering will stiffen only at speeds above 40 mph
  2. The reservoir cap is designed to vent fluid under pressure
  3. The fluid is simply cold and will expand once running
  4. A leak exists and the bus should not be dispatched until repaired Correct answer.

Explanation

Low fluid combined with visible leakage points to a loss of hydraulic pressure that can cause sudden, heavy steering effort, which is dangerous in a loaded school bus. The leak must be found and repaired and the system refilled before operation. Cold fluid does not explain fluid on the ground, and venting caps do not lose this much fluid.

Question 37School Bus Pre-Trip Inspection and Vehicle Condition

What is the proper way to check that the service brake and parking brake hold on a school bus during a pre-trip inspection?

  1. Drive at 20 mph and apply the parking brake to see if it slows the bus
  2. Apply the parking brake while the bus is moving on the road
  3. Set the parking brake, shift to neutral, and try to move forward Correct answer.
  4. Rev the engine in gear with the parking brake set and release the clutch

Explanation

A parking brake check is done stationary: set the brake, place the transmission in neutral, and gently attempt to move so you can tell whether the brake holds. Testing brakes by driving with the parking brake applied can damage the system and is unsafe. The service brake is checked separately at low speed in a safe area.

Question 38School Bus Pre-Trip Inspection and Vehicle Condition

You inspect the mirrors on a Massachusetts school bus. Which setup meets the requirement for seeing students around the bus?

  1. Side mirrors adjusted to show the rear tires only
  2. Only the two side mirrors that show the sides of the bus
  3. Side mirrors plus a convex crossover mirror showing the front bumper area Correct answer.
  4. A single interior rearview mirror aimed at the rear window

Explanation

School buses require a crossover or convex mirror that lets the driver see the area directly in front of the bumper where small children may stand. Side mirrors alone leave blind spots at the front and along the sides. The driver must be able to see a student near the front door and around the bus.

Question 39School Bus Pre-Trip Inspection and Vehicle Condition

During the pre-trip inspection you find the bus has a cracked windshield wiper blade and the washer fluid reservoir is empty. How should you proceed?

  1. Replace the blade and refill the washer fluid before departure Correct answer.
  2. Use the wipers only at low speeds to avoid streaking
  3. Dispatch the bus and refill the washer fluid at the end of the route
  4. Rely on rain repellent applied to the windshield

Explanation

A cracked wiper blade can fail to clear the windshield, and an empty washer reservoir leaves the driver unable to remove road spray, which directly reduces visibility. Both defects must be corrected before the bus carries students. Deferring the repair or relying on chemical treatments does not meet inspection standards.

Question 40School Bus Pre-Trip Inspection and Vehicle Condition

When inspecting the exhaust system of a school bus, which condition is a defect that must be corrected before dispatch?

  1. A tailpipe that extends past the rear bumper
  2. A heat shield attached with factory fasteners
  3. A hanger that lets the exhaust pipe sag and leak near the floor Correct answer.
  4. Surface rust on the outside of the muffler

Explanation

A loose hanger allows the exhaust pipe to sag, crack, or leak, and exhaust gases can enter the passenger compartment, creating a carbon monoxide hazard. Leaks and insecure mounting are out-of-service defects. Surface rust, secure heat shields, and a properly extended tailpipe are acceptable.

Question 41School Bus Pre-Trip Inspection and Vehicle Condition

You are checking the battery and electrical system in the engine compartment. Which observation is a defect requiring repair?

  1. The battery is loose and a terminal clamp is corroded Correct answer.
  2. The battery is held securely by a bracket and the terminals are clean
  3. The battery case is clean and dry on top
  4. The battery cables are routed away from moving parts

Explanation

A loose battery can shift and short against metal, and a corroded clamp causes poor contact that may prevent the engine from starting or cause electrical failures. Both conditions must be fixed before dispatch. A secure mount, clean case, and properly routed cables are acceptable.

Question 42School Bus Pre-Trip Inspection and Vehicle Condition

During inspection of the emergency equipment carried on a school bus, which combination must be present and in working order?

  1. A fire extinguisher, a spare belt, and jumper cables
  2. A spare tire, a jack, and a lug wrench
  3. A flashlight, a tow strap, and a fire blanket
  4. A fire extinguisher, a first aid kit, and a set of warning triangles Correct answer.

Explanation

School buses must carry a charged fire extinguisher, a first aid kit, and warning triangles or reflective devices to protect students and mark the bus at a stop. These items must be present and functional during pre-trip inspection. Other tools may be carried, but they are not the required emergency equipment set.

Question 43School Bus Pre-Trip Inspection and Vehicle Condition

While inspecting the passenger compartment before a run, you find a seat cushion that is loose and a seat frame with a broken mounting bolt. What is the appropriate action?

  1. Assign the seat to the smallest students to reduce stress on it
  2. Tie the cushion down with tape and complete the route
  3. Place the bus out of service until the seat is secured and the bolt replaced Correct answer.
  4. Move the seat to the rear of the bus where it is less used

Explanation

Seats must be firmly anchored because they restrain students during a crash or sudden stop; a broken mounting bolt can fail completely. The bus cannot carry passengers until the seat is repaired. Improvised fixes and relocating the seat do not restore crash protection.

Question 44School Bus Pre-Trip Inspection and Vehicle Condition

You are checking the stop lamps and turn signals on the school bus. Which method correctly verifies they work?

  1. Have a helper watch outside while you operate each switch Correct answer.
  2. Check the fuse box and confirm no fuse is blown
  3. Turn on the headlights and assume the lamps share a circuit
  4. Tap the lens with your hand and listen for a click

Explanation

Lamps must be observed directly, so the driver operates each switch while a second person watches the front and rear of the bus. A blown fuse or shared circuit does not confirm the bulbs actually illuminate. Listening for a click does not prove the lamp lights.

Question 45School Bus Pre-Trip Inspection and Vehicle Condition

During the pre-trip inspection, you check the coolant level and find it low, with a sweet smell near the engine. What does this most likely indicate?

  1. The engine is running too cool and needs a new thermostat
  2. A coolant leak that must be located and repaired before dispatch Correct answer.
  3. The coolant is simply old and needs no attention
  4. The radiator cap is working exactly as designed

Explanation

A sweet odor plus a low coolant level points to a leak in the cooling system, such as a hose, radiator, or heater core. Overheating on a route can leave students stranded and damage the engine, so the leak must be repaired before dispatch. The smell is not a sign of a properly working cap or merely old fluid.

Question 46School Bus Pre-Trip Inspection and Vehicle Condition

When checking the school bus's air brake system during pre-trip inspection, what should happen to system pressure after the engine is shut off with the brakes released?

  1. Pressure should rise steadily as the engine cools
  2. Pressure should fall to the governor cut-in point and then hold
  3. Pressure should remain steady or drop only slightly over several minutes Correct answer.
  4. Pressure should drop rapidly to zero within seconds

Explanation

A sound air brake system holds pressure when the engine is off and the brakes are released; only a slow, small drop from normal leakage is acceptable. A rapid loss of pressure signals a leak that could cause brake failure. Rising pressure with the engine off is not possible in a properly functioning system.

Question 47School Bus Pre-Trip Inspection and Vehicle Condition

You are inspecting the front suspension and steering linkage of a school bus. Which finding is a defect?

  1. Grease fittings present and lubricated at the tie rod ends
  2. Shock absorbers with no visible fluid on the outside
  3. A tie rod end with noticeable looseness when moved by hand Correct answer.
  4. Coil springs seated squarely in their mounts

Explanation

Any looseness in the steering linkage means the wheels may not respond precisely to the steering wheel, which is dangerous at speed. A tie rod end that moves freely by hand is worn and must be replaced. Lubricated fittings, seated springs, and dry shock absorbers are normal.

Question 48School Bus Pre-Trip Inspection and Vehicle Condition

During inspection you notice the bus has a broken speedometer and a malfunctioning horn. How should this affect dispatch?

  1. Dispatch the bus because neither item affects passenger safety
  2. Keep the bus out of service until both items are repaired Correct answer.
  3. Dispatch the bus and record the defects for later repair
  4. Dispatch the bus only if the route avoids highways

Explanation

The horn is a required safety device used to warn others, and a working speedometer is required equipment for lawful operation. Either defect alone makes the bus unserviceable. Deferring repairs or altering the route does not satisfy the requirement.

Question 49School Bus Pre-Trip Inspection and Vehicle Condition

While checking the rear emergency door on a school bus, you find that the door opens only after the driver releases a power lock. Why is this a problem?

  1. It prevents students from opening the exit without the driver's action Correct answer.
  2. It causes the door buzzer to sound continuously
  3. It allows the door to open wider than designed
  4. It slows the driver's normal exit at the end of the route

Explanation

Emergency exits must be operable by passengers from inside without relying on the driver, because the driver may be incapacitated in a crash. A power lock that only the driver can release defeats that purpose. The concern is not exit speed, buzzer noise, or door travel.

Question 50School Bus Pre-Trip Inspection and Vehicle Condition

You are inspecting the tires and wheels and find a lug nut missing on the left rear dual assembly. What is the correct action?

  1. Proceed if the remaining nuts are tight
  2. Mark the nut location and report it after the route
  3. Replace the missing nut and check torque on the others before dispatch Correct answer.
  4. Reduce speed and check the wheel at each stop

Explanation

A missing lug nut reduces clamping force and can lead to wheel loosening or separation, especially on dual wheels. The nut must be replaced and the remaining fasteners checked for proper torque before the bus moves. Continuing the route with a known wheel defect is unsafe.