A bus entrance closes securely, but a step tread is loose. Is the entrance inspection satisfactory?
Correct answer: No; the steps and secure walking surfaces also need inspection.
The entrance check includes the door, handrails, step lights when equipped, clear steps and secure tread. A working door does not make a loose walking surface acceptable.
Source: Minnesota Commercial Driver's Manual, archived 2023 (form January 2022); modernized Section 10M supplement, version September 9, 2022; Passenger entrance condition; printed 10M-4; physical PDF page 193; reviewed September 21, 2026. ↗
What travel condition should you demonstrate for an equipped passenger lift?
Correct answer: Fully retracted and securely latched, with damage and leaks checked.
The lift must be fully retracted and latched for travel. The inspection also addresses damage, missing parts, leaks and how correct operation is checked.
Source: Minnesota Commercial Driver's Manual, archived 2023 (form January 2022); modernized Section 10M supplement, version September 9, 2022; Passenger lift travel position; printed 10M-4; physical PDF page 193; reviewed September 21, 2026. ↗
For the modernized bus inspection, how should you address emergency exits?
Correct answer: Demonstrate at least one and explain the others, including warnings.
Section 10M requires an exit-operation demonstration, identifying how the other exits work, secure closure and working warnings. Electrical warning devices are checked with the key in the on or charged position.
Source: Minnesota Commercial Driver's Manual, archived 2023 (form January 2022); modernized Section 10M supplement, version September 9, 2022; Emergency exit demonstration; printed 10M-4; physical PDF page 193; reviewed September 21, 2026. ↗
An equipped school bus's crossing safety arm stays partly folded when the stop arm extends. What should the inspection show instead?
Correct answer: It extends fully and works with the stop-arm system.
Mounting condition is one part of the check. The safety arm must also function properly with the stop arm and extend fully, with no loose, broken or damaged parts.
Source: Minnesota Commercial Driver's Manual, archived 2023 (form January 2022); modernized Section 10M supplement, version September 9, 2022; School safety-arm coordination; printed 10M-5; physical PDF page 194; reviewed September 21, 2026. ↗
Why inspect the seals on the school bus's first-aid and body-fluid cleanup kits?
Correct answer: A broken seal can indicate that contents are missing.
The handbook calls for both kits to be present and their seals intact. A broken seal can signal missing supplies and needs attention; merely seeing a kit container does not establish its readiness.
Source: Minnesota Commercial Driver's Manual, archived 2023 (form January 2022); modernized Section 10M supplement, version September 9, 2022; School emergency-kit seals; printed 10M-5; physical PDF page 194; reviewed September 21, 2026. ↗
Rust trails or shiny areas appear around wheel fasteners. What are you looking for?
Correct answer: Possible loose fasteners, missing nuts or damaged stud holes.
The wheel inspection looks for signs of loose or damaged fastening, including rust trails and shiny surfaces. Explain the warning signs instead of treating the presence of nuts as proof of security.
Source: Minnesota Commercial Driver's Manual, archived 2023 (form January 2022); modernized Section 10M supplement, version September 9, 2022; Wheel fastening warning signs; printed 10M-6; physical PDF page 195; reviewed September 21, 2026. ↗
For a tire without an applicable automatic checking system, what demonstrates an actual inflation check?
Correct answer: Use a tire-pressure gauge rather than judging by a kick.
A tire gauge measures air pressure; kicking or looking at the tire does not. If special monitoring equipment is fitted, understand its actual function rather than assuming every monitoring system also adjusts pressure.
Source: Minnesota Commercial Driver's Manual, archived 2023 (form January 2022); modernized Section 10M supplement, version September 9, 2022; Measuring tire inflation; printed 10M-6; physical PDF page 195; reviewed September 21, 2026. ↗
The steering linkage is not visibly bent. What else belongs in its inspection?
Correct answer: Secure connections and required nuts, bolts and cotter pins.
Check the linkage for wear and damage as well as secure mounting and retained connections. An unbent part can still be unsafe if a connection is loose or a required retaining pin is missing.
Source: Minnesota Commercial Driver's Manual, archived 2023 (form January 2022); modernized Section 10M supplement, version September 9, 2022; Steering linkage fasteners; printed 10M-6; physical PDF page 195; reviewed September 21, 2026. ↗
Why inspect spring hangers and mounting hardware as well as the springs?
Correct answer: A sound spring still needs secure, undamaged attachment points.
Suspension inspection includes the springs and their mounting components. Missing or damaged attachments can be a defect even when the visible spring itself is intact.
Source: Minnesota Commercial Driver's Manual, archived 2023 (form January 2022); modernized Section 10M supplement, version September 9, 2022; Spring attachment inspection; printed 10M-7; physical PDF page 196; reviewed September 21, 2026. ↗
A brake hose is present but rubbed deeply at a nearby bracket. What should the inspection address?
Correct answer: Its damage, connections and possible leakage.
Brake hoses and lines must be checked for damage and leaks, with secure fittings. Simply finding a hose in place does not establish that its condition is safe.
Source: Minnesota Commercial Driver's Manual, archived 2023 (form January 2022); modernized Section 10M supplement, version September 9, 2022; Brake hose integrity; printed 10M-7; physical PDF page 196; reviewed September 21, 2026. ↗
Oil is visible on an accessible brake friction surface. Why is that a defect to report?
Correct answer: It can reduce braking friction and create a fire hazard.
Grease and oil on brake linings, pads, drums or discs can impair braking and create a fire risk. Do not confuse lubricated mechanical components with friction surfaces that must not be contaminated.
Source: Minnesota Commercial Driver's Manual, archived 2023 (form January 2022); modernized Section 10M supplement, version September 9, 2022; Brake friction contamination; printed 10M-7; physical PDF page 196; reviewed September 21, 2026. ↗
The bus battery is not visible or accessible during the inspection. How should you handle that item?
Correct answer: Tell the examiner it is inaccessible and explain the applicable check.
Section 10M instructs you to inform the examiner when batteries are not visible or accessible. Inspect accessible wiring and enclosures safely; do not improvise disassembly of unfamiliar equipment.
Source: Minnesota Commercial Driver's Manual, archived 2023 (form January 2022); modernized Section 10M supplement, version September 9, 2022; Inaccessible battery explanation; printed 10M-7; physical PDF page 196; reviewed September 21, 2026. ↗
You check the tractor's air and electrical connections. What other location must be included?
Correct answer: The corresponding connections at the trailer end.
Both power-unit and trailer connections must be inspected. Check seating, sealing, security and damage, along with safe routing that avoids tangling, pinching and dragging.
Source: Minnesota Commercial Driver's Manual, archived 2023 (form January 2022); modernized Section 10M supplement, version September 9, 2022; Both ends of trailer connections; printed 10M-8; physical PDF page 197; reviewed September 21, 2026. ↗
The fifth-wheel release handle appears engaged. What additional inspection is needed?
Correct answer: Confirm the locking jaws or lever are secured around the kingpin.
Inspect the actual locking engagement around the kingpin, not just the handle position. Also inspect the release mechanism and applicable safety latch or lock.
Source: Minnesota Commercial Driver's Manual, archived 2023 (form January 2022); modernized Section 10M supplement, version September 9, 2022; Fifth-wheel locking engagement; printed 10M-9; physical PDF page 198; reviewed September 21, 2026. ↗
What should you see where the trailer apron rests on the fifth-wheel skid plate?
Correct answer: The trailer lying flat with no gap between the mating plates.
Section 10M calls for the apron to lie flat on the fifth wheel without a gap. Inspect the kingpin and apron for damage as well; an apparently closed handle does not prove correct seating.
Source: Minnesota Commercial Driver's Manual, archived 2023 (form January 2022); modernized Section 10M supplement, version September 9, 2022; Apron seating and gap; printed 10M-9; physical PDF page 198; reviewed September 21, 2026. ↗
The sliding fifth-wheel release is in its travel position. What confirms the slider is secured?
Correct answer: Undamaged locking pins that are fully engaged.
Inspect the actual locking pins, their condition and full engagement. The slider's location or release-handle appearance alone does not establish that it is locked.
Source: Minnesota Commercial Driver's Manual, archived 2023 (form January 2022); modernized Section 10M supplement, version September 9, 2022; Sliding fifth-wheel pins; printed 10M-9; physical PDF page 198; reviewed September 21, 2026. ↗
Your test combination uses a ball-type coupler rather than a fifth wheel. What should you explain?
Correct answer: How that coupler works and the condition of its actual locking parts.
Coupling systems vary. Inspect the system actually installed, including secure mounting, coupler and tongue condition, and the applicable locking and safety devices.
Source: Minnesota Commercial Driver's Manual, archived 2023 (form January 2022); modernized Section 10M supplement, version September 9, 2022; Matching the actual coupling type; printed 10M-9; physical PDF page 198; reviewed September 21, 2026. ↗
On a non-fifth-wheel combination equipped with safety chains and a breakaway cable, what should you check?
Correct answer: Secure crossed chains without excessive slack, and an engaged breakaway cable.
For the equipped non-fifth-wheel systems described, the handbook checks chains or cables for security, crossing, kinks and excessive slack, and calls for the breakaway cable to be engaged. This is not a claim that every trailer type uses the same devices.
Source: Minnesota Commercial Driver's Manual, archived 2023 (form January 2022); modernized Section 10M supplement, version September 9, 2022; Coupling safety devices; printed 10M-10; physical PDF page 199; reviewed September 21, 2026. ↗
Which landing-gear condition is appropriate before the combination moves?
Correct answer: Fully raised, crank secured, with clearance for tractor turns.
Check that the gear is fully raised, supports and pads are sound, and the crank is secured. A tractor-semitrailer must also have clearance between the tractor frame and landing gear when turning.
Source: Minnesota Commercial Driver's Manual, archived 2023 (form January 2022); modernized Section 10M supplement, version September 9, 2022; Landing gear travel clearance; printed 10M-10; physical PDF page 199; reviewed September 21, 2026. ↗
At the rear of a combination's trailer, what should you inspect besides lamp operation?
Correct answer: Properly colored, clean and undamaged lenses and reflectors.
The rear check includes the condition and correct color of lenses and reflectors. Working bulbs do not compensate for missing, damaged or obscured reflective surfaces.
Source: Minnesota Commercial Driver's Manual, archived 2023 (form January 2022); modernized Section 10M supplement, version September 9, 2022; Rear reflector condition; printed 10M-8; physical PDF page 197; reviewed September 21, 2026. ↗
You find a break in the cargo floor while checking the trailer structure. Why is it relevant?
Correct answer: A damaged floor can permit loss of cargo.
The frame inspection includes cracks, breaks and holes in the cargo area or floor. Securement equipment is not a substitute for sound supporting structure.
Source: Minnesota Commercial Driver's Manual, archived 2023 (form January 2022); modernized Section 10M supplement, version September 9, 2022; Cargo floor structural damage; printed 10M-8; physical PDF page 197; reviewed September 21, 2026. ↗
After a trailer's tandem assembly has been positioned, what does the inspection need to confirm?
Correct answer: The tandem release lever and locking pins are secure.
The handbook specifically includes the trailer tandem release lever and pins. Their security is a separate check from the axle's chosen position.
Source: Minnesota Commercial Driver's Manual, archived 2023 (form January 2022); modernized Section 10M supplement, version September 9, 2022; Trailer tandem locking check; printed 10M-8; physical PDF page 197; reviewed September 21, 2026. ↗
What is the modernized inspection looking for at fuel tanks and an equipped DEF tank?
Correct answer: Secure mounting, tight caps and no tank or line leaks.
Inspect the tanks, caps, mounts and connected lines. DEF is diesel exhaust fluid, not diesel fuel; the similar inspection locations do not make their fluids interchangeable.
Source: Minnesota Commercial Driver's Manual, archived 2023 (form January 2022); modernized Section 10M supplement, version September 9, 2022; Tank caps and leak inspection; printed 10M-7; physical PDF page 196; reviewed September 21, 2026. ↗
A coach's suspension components are not readily accessible, and the coach leans to one side. What should you explain?
Correct answer: The access limitation and that leaning may indicate a suspension problem.
Tell the examiner when suspension components are not visible or accessible and check whether the vehicle sits level front-to-rear and side-to-side. Leaning can be a sign of a suspension problem.
Source: Minnesota Commercial Driver's Manual, archived 2023 (form January 2022); modernized Section 10M supplement, version September 9, 2022; Suspension condition and vehicle level; printed 10M-7; physical PDF page 196; reviewed September 21, 2026. ↗
During the exterior light check, the brake lamps illuminate but remain on after you release the service brake. Is that satisfactory?
Correct answer: No; they should illuminate on application and turn off on release.
The handbook requires checking both responses: brake lights on with brake application and off with release. A lamp that stays on cannot communicate braking changes correctly.
Source: Minnesota Commercial Driver's Manual, archived 2023 (form January 2022); modernized Section 10M supplement, version September 9, 2022; Brake lamp release operation; printed 10M-5; physical PDF page 194; reviewed September 21, 2026. ↗
The bus's seat frames are firmly attached, but a cushion is loose. What does the inspection require?
Correct answer: Secure cushions as well as sound, firmly attached seat frames.
Passenger seating inspection includes broken frames, firm attachment to the floor and cushions secured to the frames. Checking just the floor mounts leaves part of the required inspection undone.
Source: Minnesota Commercial Driver's Manual, archived 2023 (form January 2022); modernized Section 10M supplement, version September 9, 2022; Seat cushion and frame security; printed 10M-4; physical PDF page 193; reviewed September 21, 2026. ↗
