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Cert III Heavy Commercial Vehicle study materials
Cert III Heavy Commercial Vehicle study resources

Cert III Heavy Commercial Vehicle practice questions

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Question 1Core units (22 units)

Under the chain of responsibility, who bears a legal duty to prevent a breach of mass, dimension or loading requirements?

  1. Only the loading supervisor on site
  2. Only the registered operator
  3. Only the driver of the vehicle
  4. Every party in the supply chain who can influence the outcome Correct answer.

Explanation

Chain of responsibility law places duties on all parties whose actions, inactions or demands can affect compliance, including consignors, packers, loaders, schedulers and drivers. The duty is shared, so each party must take reasonable steps within its own sphere of control. Blaming a single link does not discharge the others.

Question 2Core units (22 units)

A heavy vehicle driver begins a shift feeling fatigued after poor sleep. What is the most appropriate first action?

  1. Start the trip and take extra caffeine
  2. Drive only on minor roads to reduce risk
  3. Report the fatigue and do not commence driving until fit Correct answer.
  4. Swap loads with another driver without telling anyone

Explanation

Fatigue impairs judgement and reaction time and is a recognised heavy vehicle risk factor. A driver who is not fit for duty must report it so the operator can arrange relief or delay. Self-medicating with stimulants or quietly changing plans does not remove the underlying impairment.

Question 3Core units (22 units)

What is the purpose of a pre-start inspection on a heavy commercial vehicle?

  1. To check the delivery schedule against the manifest
  2. To confirm the vehicle is safe and roadworthy before use Correct answer.
  3. To calculate the load mass for the trip
  4. To record the driver's hours for the day

Explanation

A pre-start check identifies defects in tyres, brakes, lights, fluids and load security before the vehicle moves. Finding and reporting faults early prevents breakdowns and crashes. It is a safety check, not an administrative or load-planning task.

Question 4Core units (22 units)

Which document must a heavy vehicle driver generally carry to demonstrate compliance with work and rest requirements?

  1. A load restraint certificate
  2. A copy of the workshop service invoice
  3. A current work diary or approved electronic record Correct answer.
  4. A vehicle registration certificate

Explanation

Fatigue rules require drivers to record work and rest periods in an approved work diary or electronic work diary. Authorised officers use the record to check compliance. Registration, restraint and service paperwork serve different purposes.

Question 5Core units (22 units)

A load is placed on a trailer so that the centre of mass sits well behind the rear axle group. What is the most likely effect?

  1. Increased load on the steer axle
  2. Improved braking balance
  3. Reduced stability and reduced steer axle grip Correct answer.
  4. Lower fuel consumption

Explanation

Placing mass too far rearward unloads the steer axle, reducing steering grip and making the combination prone to oversteer or jack-knifing. Load mass must be distributed so each axle group stays within its limits and the steer axle retains adequate load. Stability and control deteriorate rather than improve.

Question 6Core units (22 units)

When securing a load with chains and load binders, what does the restraint system need to withstand?

  1. Forces from braking, acceleration, cornering and vibration Correct answer.
  2. Only the force of gravity on a level road
  3. The wind resistance at highway speed alone
  4. Only the weight of the load at rest

Explanation

Load restraint must resist the dynamic forces imposed during normal driving, including braking, acceleration, cornering and road-induced vibration. A system sized only for static weight can fail in motion. The restraint standard sets minimum performance based on these forces.

Question 7Core units (22 units)

What is the main function of an exhaust brake or engine retarder on a heavy vehicle?

  1. To cool the engine during long descents
  2. To increase engine power on climbs
  3. To improve fuel economy at idle
  4. To provide auxiliary braking and reduce reliance on service brakes Correct answer.

Explanation

Retarders use engine compression or exhaust restriction to slow the vehicle, sparing the service brakes from overheating on long descents. They supplement, but do not replace, the foundation brakes. Their purpose is braking assistance, not power or cooling.

Question 8Core units (22 units)

A driver notices the low air pressure warning buzzer sounds and pressure keeps dropping. What should the driver do?

  1. Stop safely and treat the vehicle as unroadworthy until repaired Correct answer.
  2. Increase engine speed to raise compressor output while driving
  3. Pump the brake pedal rapidly to build pressure
  4. Continue to the depot and report it at the end of the shift

Explanation

A falling air pressure reading with a warning indicates a leak or compressor fault that can leave the brakes unable to release or apply correctly. The vehicle must be stopped safely and not used until the fault is repaired. Continuing or working around the symptom risks brake failure.

Question 9Core units (22 units)

What is the correct way to check the condition of a tyre during a pre-start inspection?

  1. Look only at the tread depth in the centre
  2. Inspect tread depth, sidewalls, and for cuts, bulges or embedded objects Correct answer.
  3. Check the pressure gauge only
  4. Kick the tyre to feel for softness

Explanation

A tyre check covers tread depth across the tread, sidewall condition, and any cuts, bulges, exposed cords or embedded objects. These signs indicate damage that pressure or a kick test will not reveal. A thorough visual inspection complements pressure checking.

Question 10Core units (22 units)

Under heavy vehicle mass limits, what does the term 'GVM' mean?

  1. The mass of the trailer only
  2. The mass of the vehicle empty with full fuel
  3. The maximum mass the driver may load onto the tray
  4. The mass of the vehicle when fully loaded, set by the manufacturer Correct answer.

Explanation

Gross Vehicle Mass is the maximum loaded mass the manufacturer specifies for the vehicle. It is a vehicle design limit, not a measure of the empty mass or the tray capacity. Exceeding GVM renders the vehicle overloaded.

Question 11Core units (22 units)

A combination is rated to a certain Gross Combination Mass. What does this limit cover?

  1. The prime mover alone
  2. The trailer alone
  3. Only the payload carried on the trailer
  4. The combined mass of the towing vehicle and trailer together Correct answer.

Explanation

Gross Combination Mass is the maximum permitted mass of the towing vehicle plus its trailer(s) when loaded. It caps the total combination mass rather than either unit in isolation. Exceeding it overloads the combination as a whole.

Question 12Core units (22 units)

What is the primary purpose of a daily walk-around inspection before driving a heavy vehicle?

  1. To satisfy the customer's delivery schedule
  2. To detect defects and load security issues before they cause an incident Correct answer.
  3. To measure fuel consumption trends
  4. To confirm the driver's fatigue level

Explanation

The walk-around check lets the driver find defects, fluid leaks, tyre damage and insecure loads before the vehicle moves. Early detection prevents breakdowns and crashes. It is a safety routine, not a scheduling or fuel-monitoring activity.

Question 13Core units (22 units)

A driver must reverse a large rigid truck in a yard with pedestrians nearby. What is the safest approach?

  1. Rely on the reversing camera alone
  2. Reverse quickly to minimise time in the hazard area
  3. Use a spotter or reversing aid and reverse slowly with mirrors checked Correct answer.
  4. Sound the horn continuously and reverse at normal speed

Explanation

Reversing is a high-risk manoeuvre with large blind spots. Using a spotter or reversing aid, reversing slowly and checking mirrors reduces the chance of striking a pedestrian. Speed and reliance on a single aid increase risk.

Question 14Core units (22 units)

What does a load restraint system's 'tie-down' capacity refer to?

  1. The maximum speed the vehicle may travel loaded
  2. The weight of the vehicle's tray
  3. The rated strength of the lashings and anchor points holding the load Correct answer.
  4. The height of the load above the deck

Explanation

Tie-down capacity is the rated strength of straps, chains, binders and anchor points used to hold the load. It must be sufficient for the load's mass and the forces expected in service. It is unrelated to speed, tray weight or load height.

Question 15Core units (22 units)

A driver's work diary shows a breach of the minimum rest requirement. What is the correct response?

  1. Alter the diary to avoid the breach
  2. Report the breach and take the required rest before continuing Correct answer.
  3. Continue driving and note it at the next depot
  4. Ask another driver to sign the entry

Explanation

Breaches of work and rest requirements must be reported and corrected, and the driver must not continue while non-compliant. Falsifying or concealing records is a serious offence. The safe response is to stop and take the required rest.

Question 16Core units (22 units)

Which factor most directly increases the risk of a heavy vehicle rollover during cornering?

  1. A high centre of gravity combined with excessive speed in the turn Correct answer.
  2. Gentle steering inputs and early braking
  3. Correct tyre pressure and balanced load
  4. A low centre of gravity and slow entry speed

Explanation

Rollover risk rises when a high centre of gravity is combined with lateral acceleration from fast cornering. The vehicle's stability threshold is exceeded and the outer wheels lift. Low centre of gravity, correct inflation and smooth inputs all reduce the risk.

Question 17Core units (22 units)

What is the effect of under-inflated tyres on a heavy vehicle?

  1. Increased rolling resistance, heat build-up and risk of tyre failure Correct answer.
  2. Reduced braking distance
  3. Lower load on the axle group
  4. Improved fuel economy and longer tyre life

Explanation

Under-inflation raises rolling resistance and causes the sidewall to flex excessively, generating heat that can lead to blowouts. It also increases fuel use and wear. It does not improve economy or shorten braking distance.

Question 18Core units (22 units)

When is a load considered adequately restrained?

  1. When it cannot move enough to affect vehicle stability or safety under expected forces Correct answer.
  2. When the driver has checked it once at loading
  3. When it sits flat on the tray under its own weight
  4. When it is covered by a tarpaulin

Explanation

A load is adequately restrained when it is held so it cannot shift enough to affect stability, braking or steering under the forces of normal driving. A tarpaulin or a single visual check does not provide restraint. Gravity alone is insufficient for most loads.

Question 19Core units (22 units)

What is the purpose of a brake test on a heavy vehicle before descending a long steep grade?

  1. To warm the brakes for better performance
  2. To confirm the service brakes and retarder are functioning before the descent Correct answer.
  3. To check the tyre tread depth
  4. To measure fuel consumption on the grade

Explanation

A brake test confirms that the service brakes and any retarder are working before the vehicle commits to a long descent. A fault discovered at the top can be managed safely; one discovered mid-descent may be catastrophic. Warming brakes or checking fuel and tread are not the purpose.

Question 20Core units (22 units)

A driver is asked to carry a load that exceeds the vehicle's rated payload. What should the driver do?

  1. Carry it and note the overload in the diary
  2. Carry it and drive slowly to compensate
  3. Carry it and adjust tyre pressure to suit
  4. Refuse to carry the load until it is reduced or a suitable vehicle is provided Correct answer.

Explanation

An overloaded vehicle breaches mass limits and compromises braking, steering and tyre integrity. The driver must refuse the load until it is reduced or a vehicle with adequate capacity is supplied. Driving slowly, altering pressures or recording the overload does not make it lawful or safe.

Question 21Core units (22 units)

Why is a pre-trip check of load security especially important after a load has been loaded by a third party?

  1. Because third parties are never liable for load security
  2. Because the load must be photographed for insurance
  3. Because the driver remains responsible for the security of the load before moving Correct answer.
  4. Because the driver must reweigh the vehicle

Explanation

The driver retains responsibility for ensuring the load is secure before moving, even when others loaded it. A pre-trip check catches inadequate restraint or load shift that occurred during loading. Third parties may also bear duties, but that does not transfer responsibility away from the driver.

Question 22Core units (22 units)

What is the main risk of relying solely on a reversing camera when reversing a heavy vehicle?

  1. The camera always shows a distorted image
  2. The camera drains the battery
  3. The camera may have blind spots and cannot replace direct observation and mirrors Correct answer.
  4. The camera is illegal to use

Explanation

Cameras have limited fields of view and blind spots, so they must be combined with mirrors and direct observation. Over-reliance can hide pedestrians or obstacles outside the lens. Cameras are a useful aid, not a complete substitute for observation.

Question 23Core units (22 units)

What does a 'rest break' requirement aim to achieve in heavy vehicle fatigue management?

  1. To allow the driver to recover alertness before continuing Correct answer.
  2. To give the vehicle time to cool down
  3. To reduce fuel costs on long trips
  4. To allow the load to settle on the tray

Explanation

Rest breaks are designed to let the driver recover alertness and reduce fatigue-related crash risk. They are a human-performance measure, not a fuel, cooling or load-settling strategy. The duration and frequency are set by the fatigue rules.

Question 24Core units (22 units)

A driver notices the steering feels vague and the vehicle wanders at speed. Which action is most appropriate?

  1. Stop and inspect steering components and tyre condition before continuing Correct answer.
  2. Increase speed to stabilise the vehicle
  3. Continue and report it at the next service
  4. Reduce tyre pressure to soften the steering

Explanation

Vague or wandering steering can indicate worn steering components, incorrect tyre pressure or a suspension fault. The safe response is to stop and inspect before continuing. Increasing speed or altering pressure can worsen the fault.

Question 25Core units (22 units)

What is the purpose of a load restraint certificate or documentation for a heavy vehicle?

  1. To show the vehicle's service history
  2. To prove the driver holds a heavy vehicle licence
  3. To confirm the vehicle is registered
  4. To record that the restraint method meets the required standard for the load Correct answer.

Explanation

Restraint documentation records that the chosen method and equipment meet the applicable standard for the load carried. It supports compliance and can be checked by authorised officers. It is not a licence, registration or service record.

Question 26Core units (22 units)

Which document sets out the legal maximum mass a heavy vehicle may operate at on a road, regardless of what it is actually carrying?

  1. The workshop service schedule
  2. The driver's work diary entry for the day
  3. The delivery docket issued by the loader
  4. The vehicle's GVM as shown on its compliance plate Correct answer.

Explanation

GVM is the gross vehicle mass rating assigned to the vehicle itself and recorded on its compliance plate or registration papers. It is a fixed design and legal limit that applies whether the vehicle is empty or fully laden, so it cannot be varied by paperwork created at the time of loading.

Question 27Core units (22 units)

On a heavy vehicle, what is the main purpose of the pre-start air pressure build-up test?

  1. To check that the tyres hold their inflation pressure overnight
  2. To confirm the fuel gauge reads accurately
  3. To confirm the compressor can raise system pressure to the governed cut-out within a reasonable time Correct answer.
  4. To verify the engine coolant is at operating temperature

Explanation

The build-up test measures how quickly the compressor raises reservoir pressure from a low reading to the governed cut-out point. A slow build-up points to a leaking system, a tired compressor or a restricted supply, all of which affect braking performance.

Question 28Core units (22 units)

What does a static rollover threshold of a heavy vehicle describe?

  1. The lateral acceleration at which the vehicle tips over in a steady turn Correct answer.
  2. The height the load may reach above the deck
  3. The braking distance achieved from highway speed on dry bitumen
  4. The maximum gradient the vehicle can climb when fully loaded

Explanation

Static rollover threshold is expressed as a lateral acceleration, often in g, at which the vehicle would roll in a steady-state cornering situation. A higher value means the vehicle resists tipping better, and the figure is strongly influenced by centre of gravity height and track width.

Question 29Core units (22 units)

A driver is planning a trip and the load will make the combination exceed the permitted axle group mass even though total mass is legal. What is the correct action?

  1. Redistribute or reduce the load so each axle group is within its limit before departing Correct answer.
  2. Reduce tyre pressure to spread the load over a wider footprint
  3. Travel at a lower speed to compensate for the extra axle mass
  4. Proceed because the total combination mass is under the GCM

Explanation

Mass limits apply to individual axles and axle groups as well as to the whole vehicle, so a legal total mass does not guarantee legality. The load must be positioned or reduced so every axle group stays within its rated limit.

Question 30Core units (22 units)

Which practice best manages fatigue on a long overnight line-haul run?

  1. Relying on energy drinks to stay alert for the whole shift
  2. Driving faster to finish the trip sooner and shorten the time on duty
  3. Planning scheduled rest breaks and stopping for sleep before drowsiness becomes severe Correct answer.
  4. Keeping the cabin warm and the radio quiet to stay relaxed

Explanation

Fatigue management relies on planned breaks and actual sleep rather than on stimulants or willpower. Stopping before impairment becomes severe is safer because the effects of drowsiness on reaction time cannot be overcome by effort alone.

Question 31Core units (22 units)

What is the primary function of a differential lock in a heavy vehicle driveline?

  1. To increase braking force on the rear axle
  2. To force both wheels on an axle to turn together for traction on slippery ground Correct answer.
  3. To reduce engine speed at highway cruising
  4. To disengage the transmission for coasting downhill

Explanation

A differential lock couples the two half-shafts so both wheels rotate at the same speed, which helps when one wheel loses grip. It should be used only at low speed on loose or slippery surfaces because it increases driveline wind-up and affects steering.

Question 32Core units (22 units)

A driver hears a rhythmic thumping that increases with road speed and feels vibration through the steering wheel. Which cause is most likely?

  1. A faulty coolant thermostat
  2. A worn clutch release bearing
  3. A blocked fuel filter
  4. An out-of-balance or damaged front tyre or wheel Correct answer.

Explanation

Vibration that varies with road speed and is felt through the steering is typically caused by wheel or tyre imbalance, a shifted tread belt or a damaged rim. Speed-related rotating mass problems show up in this way and should be inspected before further driving.

Question 33Core units (22 units)

What is the correct way to apply park brake and chocks when leaving a heavy vehicle unattended on a slope?

  1. Rely on the service brake held by a brick on the pedal
  2. Apply the park brake, select a low gear or park, and place chocks against the downhill wheels Correct answer.
  3. Leave the transmission in neutral with the park brake applied only
  4. Leave the engine running so air pressure is maintained

Explanation

On a grade the vehicle should be secured by the park brake plus a low gear or park position, with chocks placed against the wheels on the downhill side. This provides independent restraint if the park brake or gearing fails, and the wheels should be turned toward the kerb where practical.

Question 34Core units (22 units)

What is the key difference between a vehicle's GCM and its GVM?

  1. GCM covers the loaded vehicle plus any trailer, while GVM covers the vehicle alone Correct answer.
  2. GCM applies only to rigid trucks, while GVM applies only to prime movers
  3. GCM is set by the driver, while GVM is set by the loader
  4. GCM measures payload, while GVM measures tare mass

Explanation

GVM is the maximum loaded mass of the vehicle by itself, while GCM is the maximum loaded mass of the vehicle together with any trailer it tows. A prime mover can be within GVM yet exceed GCM once a loaded trailer is attached.

Question 35Core units (22 units)

Why must a load be checked again shortly after starting a trip, even if it was secured correctly at the depot?

  1. Loads and restraints can settle, shift or loosen once the vehicle is moving and vibrating Correct answer.
  2. Tyre pressure changes affect the restraint tension
  3. Engine temperature alters the strength of the straps
  4. The law requires a second signature on the manifest after ten kilometres

Explanation

Vibration, cornering and braking cause loads to settle and restraints to lose tension, so a re-check after the first part of the journey catches problems before they become dangerous. This is why a short stop early in the trip is a standard practice for loaded heavy vehicles.

Question 36Core units (22 units)

A driver must cross a railway level crossing with a long combination. Which approach is safest?

  1. Accelerate hard to cross quickly before any train appears
  2. Stop, check both directions and ensure there is room to clear the crossing completely before proceeding Correct answer.
  3. Follow closely behind the vehicle ahead to cross in convoy
  4. Stop on the crossing to check the load before continuing

Explanation

A long vehicle needs enough clear space beyond the crossing to fully clear the rails before entering it, because a combination can straddle the tracks for some time. Stopping and checking both directions, then proceeding only when the exit is clear, prevents the vehicle being trapped on the crossing.

Question 37Core units (22 units)

What does the term 'low loader' describe in heavy vehicle operations?

  1. A trailer with a low deck designed to carry tall or heavy machinery Correct answer.
  2. A rigid truck with a refrigerated body
  3. A prime mover fitted with a sleeper cab
  4. A truck with a lowered suspension for easy cab access

Explanation

A low loader is a heavy-duty trailer with a deck close to the ground so tall plant such as excavators can be carried within height limits. The low deck also lowers the centre of gravity and spreads the load over many axles.

Question 38Core units (22 units)

A driver notices the steering wheel has excessive free play before the wheels begin to turn. What does this most likely indicate?

  1. A restricted exhaust system
  2. Low engine oil level
  3. Wear in steering components such as tie rod ends, drag link or the steering box Correct answer.
  4. Worn brake linings

Explanation

Excessive free play means the steering linkage or box has worn components that must be inspected and repaired. Driving with this condition reduces steering precision and can lead to loss of control, so the vehicle should be taken out of service until checked.

Question 39Core units (22 units)

What is the main reason for using a tag axle or lazy axle on a heavy rigid truck?

  1. To increase top speed on highways
  2. To provide a spare wheel mounting point
  3. To share the load over more axles and stay within axle group mass limits Correct answer.
  4. To improve fuel quality in the tanks

Explanation

A tag or lazy axle is an additional non-driven axle fitted to spread the vehicle's mass across more wheels. This allows the truck to carry more payload legally without exceeding the limits of individual axle groups.

Question 40Core units (22 units)

During a brake test on a level road, the vehicle pulls sharply to one side when the brakes are applied firmly. What is the most likely cause?

  1. An overfilled windscreen washer bottle
  2. Uneven braking between wheels, such as a seized or contaminated brake on one side Correct answer.
  3. A loose steering wheel nut
  4. A faulty radio antenna

Explanation

Pulling to one side under braking indicates that one side is braking harder than the other, often from a seized caliper, contaminated linings or an adjusted slack adjuster. This is a serious defect that must be repaired before the vehicle returns to service.

Question 41Core units (22 units)

What is the purpose of a load restraint system's rating being matched to the load mass?

  1. The rating sets the maximum speed the vehicle may travel
  2. The restraints must be able to hold the load against forces generated by braking, cornering and impact Correct answer.
  3. The rating only matters for appearance during an inspection
  4. The rating determines the vehicle's fuel consumption

Explanation

Restraints must be strong enough to withstand the forward, rearward and lateral forces that occur during normal driving and emergency manoeuvres. Matching the restraint capacity to the load mass ensures the load stays attached to the vehicle in those situations.

Question 42Core units (22 units)

A driver is about to descend a long steep grade with a heavy load. Which gear selection strategy is correct?

  1. Select neutral to save fuel and rely on the foot brake
  2. Use the highest gear possible and brake hard at intervals
  3. Select a low gear before the descent and use engine braking to control speed Correct answer.
  4. Keep the clutch depressed to allow free rolling

Explanation

The correct technique is to choose a low gear before the crest so engine braking and any retarder hold the speed, with the service brake used only for trimming. Coasting in neutral or riding the brakes can overheat the brakes and lead to loss of stopping ability.

Question 43Core units (22 units)

What does 'tare mass' mean for a heavy vehicle?

  1. The combined mass of vehicle and trailer when loaded
  2. The maximum mass the vehicle may legally carry
  3. The mass of the vehicle when empty, with fuel and fluids but no payload Correct answer.
  4. The mass of the payload only

Explanation

Tare mass is the unladen mass of the vehicle as it stands, including fuel, coolant and standard equipment but excluding payload. Payload is found by subtracting tare mass from the permitted gross mass.

Question 44Core units (22 units)

A heavy vehicle's engine overheats on a long climb. What is the best immediate response?

  1. Turn off the engine immediately while still moving
  2. Ease off, select a lower gear and stop safely to let the engine cool before checking coolant Correct answer.
  3. Keep climbing at full power to reach the top faster
  4. Pour cold water straight into the radiator while the engine is hot

Explanation

Reducing load and stopping safely allows the cooling system to recover without risking damage. Cold water added to a hot engine can crack components, and switching off a moving vehicle removes power steering and braking assistance.

Question 45Core units (22 units)

What is the main function of a jake brake, or compression release brake, on a heavy diesel engine?

  1. To increase turbo boost for climbing hills
  2. To open the exhaust valves near top dead centre so the engine absorbs energy and slows the vehicle Correct answer.
  3. To preheat the fuel for cold starting
  4. To reduce exhaust emissions at idle

Explanation

A compression release brake opens the exhaust valves near the top of the compression stroke, releasing compressed air and turning the engine into an energy absorber. This provides retarding force on descents and reduces reliance on the service brakes.

Question 46Core units (22 units)

Why should a driver avoid using a retarder on a slippery or icy road?

  1. Retarding force at the drive wheels can cause them to lose traction and skid Correct answer.
  2. The retarder will overheat the engine coolant
  3. Retarders are illegal on public roads
  4. The retarder will flatten the battery

Explanation

An engine or transmission retarder applies braking force through the drive wheels, which on a low-friction surface can break traction and cause a skid. Drivers should switch off or reduce retarder use when grip is poor and rely on gentle braking instead.

Question 47Core units (22 units)

What is the correct action when a tyre shows a bulge in the sidewall during a pre-start check?

  1. Cover the bulge with a mudflap and proceed
  2. Mark the tyre and check it again at the next depot
  3. Remove the vehicle from service and have the tyre replaced before driving Correct answer.
  4. Reduce the pressure slightly and continue the trip

Explanation

A sidewall bulge indicates internal casing damage and a high risk of sudden failure, so the tyre must be replaced before the vehicle is driven. Continuing to operate with such damage risks a blowout and loss of control.

Question 48Core units (22 units)

What is the purpose of a daily defect report in a heavy vehicle fleet?

  1. To record faults found so they are repaired and tracked before the vehicle is used again Correct answer.
  2. To log the driver's fuel purchases for tax purposes
  3. To list the driver's preferred routes for the day
  4. To record the vehicle's odometer for resale value

Explanation

A defect report creates a written record of any fault found during inspection so maintenance staff can repair it and the vehicle is not returned to service until it is safe. It also provides an audit trail showing the operator is managing vehicle safety.

Question 49Core units (22 units)

A driver is coupling a trailer to a prime mover. Which check confirms the kingpin is properly engaged?

  1. A visual check of the trailer lights only
  2. A firm tug test against the trailer brakes after the fifth wheel has locked Correct answer.
  3. Checking the trailer registration label
  4. Listening for the air dryer to purge

Explanation

After backing under the trailer and locking the fifth wheel, a tug test with the trailer brakes applied confirms the jaws have closed around the kingpin. This simple check catches a high-risk fault before the vehicle moves onto the road.

Question 50Core units (22 units)

What does 'chain of responsibility' mean under heavy vehicle law?

  1. Only the driver is responsible for any breach
  2. Only the vehicle owner is responsible for any breach
  3. Responsibility passes to the consignee once the load leaves the depot
  4. Everyone in the supply chain shares responsibility for compliance with mass, dimension and fatigue rules Correct answer.

Explanation

Chain of responsibility extends legal duties to parties such as consignors, loaders, schedulers and consignees, not just the driver and operator. Each party must take reasonable steps to prevent breaches of mass, dimension, loading and fatigue requirements.