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ASE T8 Preventive Maintenance Inspection (Medium/Heavy Truck) study materials
ASE T8 Preventive Maintenance Inspection (Medium/Heavy Truck) study resources

ASE T8 Preventive Maintenance Inspection (Medium/Heavy Truck) practice questions

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Question 1Safety and Compliance

During a pre-trip inspection, a driver finds that the low-air warning buzzer and light do not activate until the gauge reads about 45 psi. What is the correct regulatory requirement?

  1. The warning must activate only when pressure falls below 20 psi.
  2. The warning must activate before the pressure drops below 60 psi. Correct answer.
  3. The warning may activate at any point before the spring brakes apply.
  4. The warning must activate whenever the engine is running.

Explanation

FMCSA inspection standards require the low-air warning device to activate before the air pressure drops below 60 psi. This gives the driver time to stop safely before spring brakes apply. A warning that first sounds at 45 psi leaves insufficient reserve.

Question 2Safety and Compliance

A technician is checking slack adjuster pushrod travel on a truck with automatic slack adjusters. Which practice is appropriate?

  1. Measure travel at normal applied pressure and compare to the manufacturer's limit. Correct answer.
  2. Ignore pushrod travel because automatic adjusters cannot go out of adjustment.
  3. Set the pushrod travel to the maximum allowed to reduce brake drag.
  4. Adjust the slack adjuster by hand until the pushrod is fully extended.

Explanation

Pushrod travel is checked with the brakes applied at the specified pressure and compared against the manufacturer's limit for that chamber type. Automatic slack adjusters can still fall out of adjustment or fail. Hand-adjusting or maximizing travel is not a valid inspection method.

Question 3Safety and Compliance

When must a driver prepare a written vehicle inspection report after a post-trip inspection?

  1. Only when a defect is discovered that would affect safety or lead to a breakdown. Correct answer.
  2. Only when the previous driver left a report.
  3. Only when the vehicle is operated across state lines.
  4. Every day regardless of whether any defect is found.

Explanation

A written post-trip report is required when the driver discovers a defect that affects safe operation or could cause a breakdown. If no such defect is found, a report is not mandated under the federal rule. The report documents defects so they can be repaired before the next trip.

Question 4Safety and Compliance

A truck's parking brake will not hold the vehicle on a grade. Which inspection item is most directly implicated?

  1. The steering gear lash.
  2. The exhaust manifold studs.
  3. The coolant recovery tank.
  4. The spring brake chambers and their pushrods. Correct answer.

Explanation

Parking braking force comes from the spring brake chambers, so a failure to hold on a grade points to the spring brakes, their pushrods, or the parking control valve. Steering lash, cooling system parts, and exhaust hardware do not provide holding force.

Question 5Safety and Compliance

During an inspection, a technician notices the red indicator on an air tank drain valve stays extended after the valve is closed. What does this most likely indicate?

  1. The tank is overpressurized.
  2. The drain valve is stuck open and the tank is losing air. Correct answer.
  3. The compressor governor is set too low.
  4. The safety valve has failed closed.

Explanation

A drain valve that does not reseat properly will leak air from the tank, and the extended indicator suggests it is not fully closed. This can cause low pressure and compressor overwork. Overpressure and governor settings would show different symptoms.

Question 6Safety and Compliance

Which item should be checked on the steering system during a preventive maintenance inspection?

  1. The torque of the lug nuts on the trailer only.
  2. The color of the power steering fluid only.
  3. The height of the driver's seat.
  4. Free play at the steering wheel with the front wheels straight ahead. Correct answer.

Explanation

Steering free play is measured at the rim of the steering wheel with the wheels pointed straight ahead and compared to the manufacturer's limit. This detects worn linkages and steering gear problems. Fluid color, trailer lug torque, and seat height do not measure steering system condition.

Question 7Safety and Compliance

A driver must place reflective triangles when stopping on a two-lane highway. Which placement is correct?

  1. One at the rear of the vehicle, one about 100 feet behind, and one about 100 feet ahead in the oncoming lane. Correct answer.
  2. All three directly behind the vehicle within 10 feet.
  3. Two behind the vehicle and one in the driver's door window.
  4. One on the roof of the cab and two at the rear bumper.

Explanation

On a two-lane road, triangles are placed at the rear of the vehicle, about 100 feet behind, and about 100 feet ahead in the oncoming lane to warn traffic from both directions. Spacing them closely behind the vehicle does not give approaching drivers enough warning.

Question 8Safety and Compliance

During a brake inspection, a technician finds a brake chamber with a cracked housing. What is the correct action?

  1. Reduce the load carried and continue operating.
  2. Remove the vehicle from service until the chamber is replaced. Correct answer.
  3. Note it and continue operating until the next scheduled service.
  4. Seal the crack with tape and recheck at the next trip.

Explanation

A cracked brake chamber is a safety defect that can cause brake failure or a sudden spring brake release. The vehicle must be taken out of service until the chamber is replaced. Patching or deferring the repair is unsafe.

Question 9Safety and Compliance

What is the primary purpose of the annual inspection under the federal periodic inspection requirement?

  1. To check the driver's medical certification.
  2. To verify that specified vehicle components meet minimum safety standards. Correct answer.
  3. To confirm the vehicle's fuel economy.
  4. To verify the vehicle's registration and plates.

Explanation

The periodic inspection verifies that specified components meet minimum safety standards at least once every 12 months. It covers items such as brakes, steering, lighting, and tires. Fuel economy, driver medical cards, and registration are separate matters.

Question 10Safety and Compliance

A technician is checking tire condition during a preventive maintenance inspection. Which finding requires the vehicle to be removed from service?

  1. A tire with a cut exposing the cord. Correct answer.
  2. A tire with 8/32 inch of tread on the steer axle.
  3. A tire with a properly seated valve cap.
  4. A tire with a slightly weathered sidewall.

Explanation

Any tire with cord exposed through a cut or crack is a safety defect and cannot remain in service. Adequate tread depth, minor weathering, and a seated valve cap are acceptable. Exposed cord indicates structural damage.

Question 11Safety and Compliance

When checking the service brakes during a pre-trip inspection, what should the technician verify about the brake system?

  1. That air pressure builds and holds and that brakes apply and release without leaks. Correct answer.
  2. That the wipers operate while the brakes are held.
  3. That the horn sounds when the brakes are applied.
  4. That the fuel gauge reads above half.

Explanation

The brake check verifies that the system builds and holds pressure, that brakes apply and release properly, and that no audible leaks are present. Horn, wiper, and fuel gauge operation are unrelated to brake function.

Question 12Safety and Compliance

A driver reports that the ABS warning light stays on after the vehicle starts moving. What does this indicate?

  1. The service brakes are fully applied.
  2. The parking brake is set.
  3. The ABS has detected a fault and the system may not function. Correct answer.
  4. The ABS is operating normally.

Explanation

An ABS lamp that remains illuminated after the vehicle begins moving indicates a fault in the anti-lock system. The vehicle may still have normal service braking but lose ABS function. The fault should be diagnosed and repaired.

Question 13Safety and Compliance

During a walk-around inspection, a technician finds the fifth wheel jaws are not fully closed around the kingpin. What is the correct action?

  1. Move the vehicle slowly to the shop for repair.
  2. Do not move the vehicle until the coupling is corrected and verified. Correct answer.
  3. Continue the trip and recheck at the next stop.
  4. Apply grease to the jaws and continue.

Explanation

An improperly closed fifth wheel can allow the trailer to separate from the tractor, causing a serious crash. The coupling must be corrected and verified with a pull test before the vehicle moves. Greasing or deferring the repair does not fix an unsafe coupling.

Question 14Safety and Compliance

What should a technician do before working under a vehicle supported only by a hydraulic floor jack?

  1. Chock only the front wheels and proceed.
  2. Place approved jack stands under the frame before going underneath. Correct answer.
  3. Ask a coworker to hold the jack handle.
  4. Lower the jack slowly while working.

Explanation

A hydraulic jack alone can fail or bleed down, so approved stands must support the vehicle before anyone works underneath. Chocking wheels and holding the handle do not provide reliable support. This is a fundamental shop safety practice.

Question 15Safety and Compliance

A technician drains moisture from an air tank and finds a significant amount of oil in the water. What does this most likely indicate?

  1. The air compressor is passing oil into the system. Correct answer.
  2. The governor is cutting out too soon.
  3. The safety valve is set too high.
  4. The drain valve is installed backwards.

Explanation

Oil in the drained air tank condensate usually points to an air compressor that is passing oil, which can damage valves and other air components. Drain valve orientation, safety valve setting, and governor cutoff do not cause oil in the tank.

Question 16Safety and Compliance

Which document must a motor carrier retain to show that required driver vehicle inspection reports were reviewed and repairs were completed?

  1. Driver vehicle inspection reports and certification of repairs. Correct answer.
  2. Fuel purchase receipts.
  3. Tire rotation logs.
  4. Driver's personal logbook only.

Explanation

Carriers must retain driver vehicle inspection reports and the certification that reported defects were repaired. These records demonstrate compliance with inspection and repair requirements. Fuel receipts and tire logs are not the required documentation for this purpose.

Question 17Safety and Compliance

During a brake test, a technician notices that the low-air warning activates but the spring brakes do not apply when pressure continues to drop. What is the most likely cause?

  1. The warning buzzer is too loud.
  2. The compressor is building pressure too quickly.
  3. The tires are overinflated.
  4. A fault in the parking brake control valve or spring brake circuit. Correct answer.

Explanation

Spring brakes should apply automatically as pressure falls below the designed threshold. If they do not, the parking control valve or spring brake circuit is likely faulty. Warning volume, compressor speed, and tire inflation do not control spring brake application.

Question 18Safety and Compliance

A technician is inspecting the exhaust system during a preventive maintenance inspection. Which condition is a defect requiring repair?

  1. A crack in the exhaust pipe ahead of the muffler. Correct answer.
  2. A hanger with normal surface rust.
  3. A properly tightened clamp at a joint.
  4. A slight discoloration on the muffler surface.

Explanation

A cracked exhaust pipe can leak carbon monoxide and is a safety and compliance defect. Surface discoloration, tight clamps, and normal hanger rust are acceptable conditions. Exhaust leaks must be repaired promptly.

Question 19Safety and Compliance

What is the correct way to check the coolant level on a vehicle with a pressurized surge tank?

  1. Remove the cap and look for steam.
  2. Check only when the engine is at full operating temperature.
  3. Open the cap immediately after shutdown to check the level.
  4. Check the level cold or after the engine has cooled, per the manufacturer's markings. Correct answer.

Explanation

Coolant should be checked when the system is cold or fully cooled, using the manufacturer's level markings. Opening a hot pressurized cap can cause severe burns. Checking at operating temperature or looking for steam is unsafe.

Question 20Safety and Compliance

A driver is required to perform a pre-trip inspection, but the previous driver left a repair order showing a defect was corrected. What should the current driver do?

  1. Only check the repaired item and skip the rest.
  2. Skip the pre-trip because the defect was repaired.
  3. Perform the pre-trip inspection as required regardless of the repair order. Correct answer.
  4. Ask the shop to do the pre-trip instead.

Explanation

Each driver must perform the required pre-trip inspection before operating the vehicle, even if prior repairs were completed. The inspection confirms the vehicle is safe for the current trip. Skipping it or checking only one item does not satisfy the requirement.

Question 21Safety and Compliance

During a preventive maintenance inspection, a technician finds a wheel with loose lug nuts on a steer axle. What is the correct action?

  1. Tighten the nuts and release the vehicle without further inspection.
  2. Remove the vehicle from service and inspect the wheel and studs before repair. Correct answer.
  3. Note the condition and recheck at the next service interval.
  4. Reduce the load and continue the trip.

Explanation

Loose lug nuts can indicate stud fatigue, wheel damage, or improper installation and can lead to wheel loss. The vehicle must be removed from service, and the wheel and studs must be inspected before repair. Simply tightening and releasing or deferring the check is unsafe.

Question 22Safety and Compliance

What is the purpose of the brake adjustment and leakage check required during a periodic inspection?

  1. To test the horn and turn signals.
  2. To confirm brakes are properly adjusted and that air pressure is not leaking. Correct answer.
  3. To measure tire tread depth.
  4. To verify the parking brake pedal feel only.

Explanation

The inspection confirms that brakes are properly adjusted and that the air system does not leak excessively. These checks ensure braking performance meets minimum standards. Pedal feel alone, tread depth, and horn tests do not address brake adjustment or leakage.

Question 23Safety and Compliance

A technician notices that a trailer's ABS lamp does not illuminate at all during the power-up test. What should the technician conclude?

  1. The lamp is intentionally disabled during normal operation.
  2. The ABS lamp or circuit may be faulty and should be diagnosed. Correct answer.
  3. The trailer has no ABS system.
  4. The ABS system is functioning correctly.

Explanation

The ABS lamp should illuminate during the power-up self-test and then go out. A lamp that never illuminates indicates a possible bulb, wiring, or power fault that should be diagnosed. It does not confirm correct ABS operation.

Question 24Safety and Compliance

When inspecting a vehicle's lighting system during a preventive maintenance inspection, which condition is a defect?

  1. A clearance lamp that does not illuminate when switched on. Correct answer.
  2. A brake lamp that illuminates when the pedal is pressed.
  3. A headlamp aimed within the manufacturer's specification.
  4. A turn signal that flashes at a normal rate.

Explanation

Required lamps must illuminate when switched on, so a non-working clearance lamp is a defect. Properly aimed headlamps, normally flashing signals, and functional brake lamps are acceptable. Lighting defects must be repaired before operation.

Question 25Safety and Compliance

A technician is checking the air compressor governor cut-in and cut-out pressures. The governor cuts out at about 120 psi and cuts in at about 100 psi. What should the technician conclude?

  1. The governor has failed and must be replaced.
  2. The governor is set too low and must be raised.
  3. The governor is set too high and must be lowered.
  4. The governor is operating within a typical acceptable range. Correct answer.

Explanation

Typical air systems cut out near 120 to 125 psi and cut in around 100 psi, so these readings are within a normal range. The cut-in/cut-out spread ensures adequate pressure recovery. There is no indication of failure or misadjustment.

Question 26Safety and Compliance

During a preventive maintenance inspection, a technician must verify that the vehicle's emergency equipment is present and serviceable. Which set of items satisfies the federal requirement for a truck?

  1. Two reflective triangles, a first aid kit, and a fire extinguisher
  2. Three reflective triangles, a fire extinguisher, and spare electrical fuses Correct answer.
  3. Four reflective triangles and a fire extinguisher
  4. Three flares, a fire extinguisher, and a spare tire

Explanation

Federal rules require power units to carry three bidirectional reflective triangles (or equivalent warning devices), a properly rated and charged fire extinguisher, and spare fuses for vehicles so equipped. These items must be inspected for presence and condition during PM.

Question 27Safety and Compliance

A technician is inspecting the securement of a load on a flatbed trailer. Which condition meets the minimum aggregate working load limit requirement for the cargo?

  1. The tiedowns provide a total working load limit at least one and a half times the cargo weight
  2. The tiedowns provide a total working load limit at least half the weight of the cargo
  3. The tiedowns provide a total working load limit at least equal to the weight of the cargo Correct answer.
  4. The tiedowns provide a total working load limit at least one-quarter of the cargo weight

Explanation

Cargo securement rules require the aggregate working load limit of the tiedown assemblies to be at least 50 percent of the cargo weight, and for some configurations the system must be rated to the full cargo weight. The technician verifies tiedown count, condition, and rating during inspection.

Question 28Safety and Compliance

During a PM inspection, a technician finds that the vehicle's speedometer is inoperative but the odometer still records distance. How should this be handled?

  1. Record the defect on the inspection report and schedule repair, since an inoperative speedometer is a reportable defect Correct answer.
  2. Declare the vehicle out of service until the speedometer is repaired
  3. Adjust the tire size calibration to restore the speedometer reading
  4. Note it as a minor defect and release the vehicle with a written reminder to the driver

Explanation

An inoperative speedometer is a defect that must be recorded on the inspection report and corrected; it does not by itself place the vehicle out of service under the CVSA out-of-service criteria. The technician documents it and ensures repair is scheduled before further operation beyond the allowed conditions.

Question 29Safety and Compliance

A technician is preparing to perform a PM inspection on a vehicle equipped with an air dryer. Which maintenance practice best protects the downstream air system?

  1. Bypass the dryer purge valve to reduce compressor cycling
  2. Service the dryer only after moisture is found at the treadle valve
  3. Replace the desiccant cartridge at the manufacturer's interval and drain the tanks regularly Correct answer.
  4. Remove the desiccant cartridge to increase airflow and rely on manual tank draining

Explanation

The air dryer removes moisture and oil aerosol before air reaches the wet tank and downstream components. Following the manufacturer's cartridge replacement interval and continuing regular tank draining keeps the system dry and protects valves and the compressor.

Question 30Safety and Compliance

A technician is reviewing the brake system on a vehicle equipped with automatic slack adjusters. The pushrod stroke on one chamber exceeds the adjustment limit after a full brake application. What is the most appropriate conclusion?

  1. The reading is invalid because automatic slack adjusters cannot be stroke-checked
  2. The slack adjuster is operating correctly and the reading should be rechecked after several applications
  3. The excess stroke indicates a mechanical or installation problem that must be diagnosed rather than manually readjusted Correct answer.
  4. The chamber size is incorrect and the entire brake system should be replaced

Explanation

Automatic slack adjusters are designed to maintain proper pushrod stroke; when stroke exceeds the limit, it signals a mechanical issue such as a worn S-cam, bad foundation components, or incorrect installation. The correct response is to find and repair the cause, not to manually crank the adjuster, which can mask the defect.

Question 31Vehicle Inspection and Documentation

During a pre-trip inspection, a driver finds that the left rear outer tire has a tread depth of 2/32 inch in two adjacent major grooves. What is the required action?

  1. Record the reading and continue the trip
  2. Inflate the tire to the maximum sidewall pressure
  3. Place the vehicle out of service until the tire is replaced Correct answer.
  4. Rotate the tire to a steer axle position

Explanation

Front steer tires require at least 4/32 inch of tread and all other tires require at least 2/32 inch in any major groove. A tire at the minimum limit with adjacent worn grooves is no longer serviceable. The vehicle must be removed from service until the tire is replaced.

Question 32Vehicle Inspection and Documentation

Which document must a driver complete before operating a commercial vehicle that requires a periodic inspection?

  1. A warranty registration card
  2. A bill of lading
  3. A fuel tax return
  4. A driver vehicle inspection report Correct answer.

Explanation

Federal rules require a driver vehicle inspection report (DVIR) when a defect is found or when the vehicle is operated for a carrier. The report documents defects and certifies that repairs were made. Other shipping and tax documents serve unrelated purposes.

Question 33Vehicle Inspection and Documentation

An inspector hears a steady hiss at a wheel position while the service brakes are released. Which condition should be suspected?

  1. A glazed brake drum
  2. A worn slack adjuster
  3. A leaking brake chamber diaphragm or hose Correct answer.
  4. A loose wheel bearing

Explanation

A continuous air leak with the brakes released points to a failed diaphragm, hose, or fitting in the air system. Slack adjusters, drums, and bearings do not produce a constant air hiss. The leak must be repaired before the vehicle is released.

Question 34Vehicle Inspection and Documentation

What is the primary purpose of a daily walk-around inspection?

  1. To identify defects before they become failures on the road Correct answer.
  2. To confirm the driver's hours of service
  3. To verify cargo weight distribution
  4. To calculate fuel economy for the trip

Explanation

The walk-around inspection is a systematic check for defects that could cause a breakdown or crash. Cargo weight, fuel economy, and hours of service are tracked separately. Early detection is the core safety rationale.

Question 35Vehicle Inspection and Documentation

A driver notes a defect on the DVIR that does not affect safe operation. What is the correct next step?

  1. Record the defect and have it repaired before the next required inspection interval Correct answer.
  2. Repair the defect only if the customer complains
  3. Erase the entry to avoid a violation
  4. Ignore the defect until the next scheduled service

Explanation

All defects must be recorded on the DVIR, and repairs must be certified before the vehicle is operated again. Non-safety defects are still documented and corrected per the carrier's maintenance schedule. Falsifying or omitting entries violates the recordkeeping rule.

Question 36Vehicle Inspection and Documentation

Which item is checked during the engine compartment portion of a pre-trip inspection?

  1. Coolant level and belt condition Correct answer.
  2. Landing gear crank operation
  3. Fifth wheel jaw adjustment
  4. Trailer air line couplers

Explanation

The engine compartment check covers fluid levels, belts, hoses, and visible leaks. Fifth wheel, trailer couplers, and landing gear are inspected at the coupling area. Grouping items by location keeps the inspection systematic.

Question 37Vehicle Inspection and Documentation

What does a straightedge placed across a brake drum reveal?

  1. Wheel seal leakage
  2. Drum taper
  3. Drum out-of-round and wear depth Correct answer.
  4. Shoe lining thickness

Explanation

A straightedge and feeler gauge detect scoring, bell-mouth, and out-of-round conditions on the drum friction surface. Lining thickness is measured at the shoe, and seal leakage is observed at the hub. These are separate checks.

Question 38Vehicle Inspection and Documentation

A truck's low air pressure warning device fails to activate when pressure drops. What is the consequence for the inspection?

  1. The defect is logged for the next annual inspection
  2. The driver may proceed if the parking brake holds
  3. The vehicle is out of service until the warning system works Correct answer.
  4. The vehicle passes because the buzzer is optional

Explanation

The low pressure warning must activate before pressure falls below 60 psi. A non-functioning warning is a critical defect that places the vehicle out of service. Optional equipment rules do not apply to required safety warnings.

Question 39Vehicle Inspection and Documentation

An inspector finds a crack in a brake drum friction surface. How should this be handled?

  1. Replace the drum before the vehicle is dispatched Correct answer.
  2. Apply heat to close the crack
  3. Record it and continue if the crack is under one inch
  4. Grind the crack smooth and reuse the drum

Explanation

Cracks in a brake drum compromise structural integrity and braking performance. The drum must be replaced, and the vehicle cannot be released until the repair is complete. No field repair method restores a cracked drum.

Question 40Vehicle Inspection and Documentation

Which record links a vehicle defect to the repair that corrected it?

  1. The maintenance repair order Correct answer.
  2. The registration certificate
  3. The shipping manifest
  4. The insurance binder

Explanation

A repair order documents the defect found, the corrective action taken, and the person who certified the repair. It provides the audit trail required by maintenance rules. Shipping, registration, and insurance documents do not record repairs.

Question 41Vehicle Inspection and Documentation

During an inspection, a steer tire shows a bulge on the sidewall. What does this indicate?

  1. A minor cosmetic flaw
  2. Internal cord separation requiring immediate removal Correct answer.
  3. Normal sidewall flexing under load
  4. Proper inflation pressure

Explanation

A bulge signals internal structural damage such as cord separation, which can lead to sudden failure. The tire must be removed from service immediately. Sidewall flexing appears as a slight flat spot at the contact patch, not a localized bulge.

Question 42Vehicle Inspection and Documentation

An inspector measures pushrod travel on a Type 30 brake chamber and finds it exceeds the adjustment limit. What is the correct interpretation?

  1. The brake is properly adjusted
  2. The drum is too thick
  3. The brake is out of adjustment and must be corrected Correct answer.
  4. The chamber size is incorrect

Explanation

Excessive pushrod travel means the slack adjuster or foundation brake is out of adjustment, reducing braking force. The condition must be corrected and rechecked before dispatch. Chamber size and drum thickness are separate specifications.

Question 43Vehicle Inspection and Documentation

Which practice best ensures an inspection is repeatable and complete?

  1. Following a written checklist in a fixed sequence Correct answer.
  2. Inspecting only items that failed previously
  3. Checking items in a random order
  4. Relying on memory for common items

Explanation

A written checklist in a consistent sequence prevents skipped items and makes results comparable over time. Memory and random order invite omissions. Prior failures are only a subset of what must be checked.

Question 44Vehicle Inspection and Documentation

A driver completes a DVIR listing no defects. What certification does that signature represent?

  1. That the vehicle was inspected and is safe to operate Correct answer.
  2. That the fuel level is adequate
  3. That the driver is rested
  4. That the cargo was counted correctly

Explanation

Signing a defect-free DVIR certifies that the required inspection was performed and no defects were found. It is a statement about vehicle condition. Cargo, rest status, and fuel are documented elsewhere.

Question 45Vehicle Inspection and Documentation

An inspector notices uneven wear on the inside edge of a steer tire. Which condition is most likely?

  1. Over-inflation
  2. A loose lug nut
  3. Excessive tread depth
  4. Incorrect camber or toe alignment Correct answer.

Explanation

Inner-edge wear on a steer tire typically results from camber or toe misalignment. Over-inflation wears the center of the tread, and tread depth does not cause edge wear. Alignment should be checked and corrected.

Question 46Vehicle Inspection and Documentation

What is the correct action when a required inspection item cannot be checked because of a missing component?

  1. Skip the item and finish the inspection
  2. Assume the item is satisfactory
  3. Note the condition and repair or replace the component before dispatch Correct answer.
  4. Mark the item as passing

Explanation

A missing component prevents a valid inspection and is itself a defect. The condition must be documented and corrected before the vehicle is released. Assuming or marking a pass without verification falsifies the record.

Question 47Vehicle Inspection and Documentation

An inspector checks the air compressor governor cut-out pressure and finds it within specification. What does this confirm?

  1. The compressor unloads at the correct system pressure Correct answer.
  2. The tires are properly inflated
  3. The coolant is at the correct level
  4. The brakes are fully adjusted

Explanation

The governor controls when the compressor stops building pressure, so cut-out within spec confirms correct unloading pressure. Brake adjustment, tire inflation, and coolant level are unrelated systems.

Question 48Vehicle Inspection and Documentation

A driver finds a leaking wheel seal on a rear axle. Which downstream component is most at risk?

  1. The brake linings and drum Correct answer.
  2. The steering gearbox
  3. The radiator
  4. The exhaust manifold

Explanation

Gear oil from a leaking seal can contaminate brake linings and the drum, reducing friction and causing imbalance. The steering gear, radiator, and exhaust are remote from the wheel end. The seal must be replaced and contaminated brake parts cleaned or replaced.

Question 49Vehicle Inspection and Documentation

An inspector finds a brake hose with chafed reinforcement cords visible. What does this condition require?

  1. Wrap the hose with tape and continue
  2. Replace the hose before operation Correct answer.
  3. Increase system pressure to compensate
  4. Shorten the hose to remove the chafed section

Explanation

Visible reinforcement damage means the hose has lost structural integrity and may burst under pressure. It must be replaced, not patched or modified. Taping and pressure changes do not restore strength.

Question 50Vehicle Inspection and Documentation

A fleet wants to extend inspection intervals without increasing risk. Which approach is most defensible?

  1. Extend intervals whenever drivers request it
  2. Rely on annual inspections alone
  3. Base intervals on documented failure trends and manufacturer guidance Correct answer.
  4. Skip inspections for low-mileage vehicles

Explanation

Interval decisions should be data-driven, using failure history and manufacturer recommendations to justify changes. Driver preference, mileage alone, and annual-only inspections do not provide a defensible basis. Documentation supports both safety and regulatory compliance.