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Saudi Heavy Vehicle Theory study materials
Saudi Heavy Vehicle Theory study resources

Saudi Heavy Vehicle Theory practice questions

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Question 1Traffic laws, regulations and road signs

On a Saudi highway, a circular sign with a red border and the number 80 inside indicates which of the following?

  1. The recommended speed in rain is 80 km/h
  2. The maximum permitted speed is 80 km/h Correct answer.
  3. The distance to the next exit is 80 km
  4. The minimum permitted speed is 80 km/h

Explanation

Circular signs with a red border are prohibitory signs, and a number inside them states the maximum speed allowed. The limit applies from the point where the sign is placed until it is cancelled by another sign or by leaving the road.

Question 2Traffic laws, regulations and road signs

A heavy goods vehicle approaches a red octagonal sign at a junction where a police officer is directing traffic. What must the driver do?

  1. Sound the horn and pass slowly
  2. Obey the officer's signals, which override the sign Correct answer.
  3. Continue if no other vehicle is visible
  4. Stop fully, then proceed when the way is clear

Explanation

Police officers directing traffic take precedence over fixed signs and signals. The driver must follow the officer's hand and body signals even where they conflict with the sign.

Question 3Traffic laws, regulations and road signs

What does a solid continuous white line along the centre of a two-way road mean for a truck driver?

  1. The line marks the edge of a parking bay
  2. Overtaking is prohibited, and the line must not be crossed Correct answer.
  3. Overtaking is allowed when the road ahead is clear
  4. The line marks a lane reserved for slow vehicles

Explanation

A continuous centre line prohibits crossing it, so overtaking that requires crossing the line is not allowed. Drivers may cross only where the line is broken or where a specific sign or marking permits it.

Question 4Traffic laws, regulations and road signs

A driver sees a triangular sign with a red border containing a symbol of two children. What is the correct response?

  1. Stop immediately and wait for a marshal
  2. Maintain speed because the sign is only advisory
  3. Sound the horn continuously until past the area
  4. Reduce speed and watch for children near a school or playground Correct answer.

Explanation

Triangular red-bordered signs are warning signs, alerting drivers to a hazard ahead. The symbol of children warns of a school or playground, so the driver should slow down and be ready to stop.

Question 5Traffic laws, regulations and road signs

Under Saudi traffic regulations, which document must a heavy vehicle driver be able to produce during a roadside inspection?

  1. A copy of the vehicle's purchase invoice
  2. A medical certificate issued within the last week
  3. A valid driving licence of the correct category for the vehicle Correct answer.
  4. A letter from the vehicle manufacturer

Explanation

Drivers must hold and produce a valid licence of the category that covers the vehicle being driven. Inspectors routinely check the licence together with the vehicle registration and insurance.

Question 6Traffic laws, regulations and road signs

What is the meaning of a yellow box junction marking painted on the road surface at an intersection?

  1. Park only inside the box while loading
  2. Use the box as a lane for turning only
  3. Stop inside the box to give way to the right
  4. Do not enter the box unless the exit is clear Correct answer.

Explanation

A yellow box marking is designed to keep the junction clear. A driver must not enter the boxed area unless the exit beyond it is clear enough to leave the box without stopping.

Question 7Traffic laws, regulations and road signs

A heavy truck is travelling on a road where the speed limit for heavy vehicles is lower than for light vehicles. Which limit applies to the truck?

  1. The higher general limit for light vehicles
  2. No limit applies to vehicles over a certain weight
  3. The limit shown on the nearest direction sign
  4. The lower limit specified for heavy vehicles Correct answer.

Explanation

Where regulations set a specific lower limit for heavy vehicles, that limit applies regardless of the general limit for cars. Drivers must know the category limits that apply to the vehicle they are operating.

Question 8Traffic laws, regulations and road signs

What does a blue circular sign showing a white arrow pointing straight ahead indicate?

  1. Traffic must give way to oncoming vehicles
  2. Traffic may turn left or go straight
  3. Traffic must proceed straight ahead only Correct answer.
  4. Traffic must stop before proceeding

Explanation

Blue circular signs are mandatory signs, and a white arrow shows the direction traffic is required to take. A single arrow pointing straight ahead therefore requires all traffic to continue straight.

Question 9Traffic laws, regulations and road signs

A truck driver is involved in a collision that causes injury to another road user. What is the driver's legal obligation at the scene?

  1. Exchange details only if the other party requests them
  2. Stop, give assistance, and report the incident to the authorities Correct answer.
  3. Drive to the nearest police station without stopping
  4. Continue the journey and report the incident the next day

Explanation

When a collision causes injury, the driver must stop, provide reasonable assistance, and notify the traffic authorities. Leaving the scene without stopping is a serious offence.

Question 10Traffic laws, regulations and road signs

What is the primary purpose of a lane reserved for slow-moving vehicles on a steep uphill section of highway?

  1. To allow vehicles to park while the engine cools
  2. To permit overtaking on the right
  3. To separate slow heavy vehicles from faster traffic and reduce congestion Correct answer.
  4. To serve as an emergency stopping area

Explanation

Crawler lanes on steep gradients let slow heavy vehicles climb without blocking faster traffic. This improves flow and reduces the risk of rear-end collisions on the incline.

Question 11Traffic laws, regulations and road signs

A driver approaches an intersection where the traffic light is out of order and no officer is present. What is the correct approach?

  1. Proceed at the normal speed because the light is not showing red
  2. Slow down, give way to traffic already in the junction, and proceed with caution Correct answer.
  3. Treat the junction as a four-way stop and wait indefinitely
  4. Wait until the light is repaired before moving

Explanation

When signals fail, drivers must treat the junction as uncontrolled and proceed cautiously. They should reduce speed, yield to traffic already in or entering the junction, and be prepared to stop.

Question 12Traffic laws, regulations and road signs

A heavy vehicle driver wishes to change lanes on a multi-lane highway. Which sequence is correct?

  1. Signal, move immediately, then check mirrors
  2. Sound the horn, then change lanes without signalling
  3. Check mirrors and blind spot, signal, then move when it is safe Correct answer.
  4. Check mirrors only, then move without signalling

Explanation

A lane change requires observation, a clear signal, and a final check before moving. Heavy vehicles have large blind spots, so the driver must confirm the space is clear before committing.

Question 13Traffic laws, regulations and road signs

What is the required response when a driver sees a red triangle sign with the word 'GIVE WAY' at a junction?

  1. Stop completely before entering the junction
  2. Slow down and yield to traffic on the priority road Correct answer.
  3. Accelerate to merge ahead of approaching traffic
  4. Proceed without yielding because the sign is advisory

Explanation

A give-way sign requires the driver to yield to traffic on the road being joined. A full stop is required only if the situation demands it, for example when vehicles are approaching.

Question 14Traffic laws, regulations and road signs

Which behaviour is required of a driver approaching a pedestrian crossing where a pedestrian is waiting to cross?

  1. Continue at the same speed if the pedestrian has not stepped onto the road
  2. Slow down and be prepared to stop to let the pedestrian cross Correct answer.
  3. Flash the headlights to warn the pedestrian to wait
  4. Move into the adjacent lane to pass the crossing

Explanation

Drivers must approach pedestrian crossings with care and yield to pedestrians crossing or waiting to cross. Failing to give way at a marked crossing is a traffic offence.

Question 15Traffic laws, regulations and road signs

A truck driver is directed by a traffic officer to pull over for a document check. What must the driver do?

  1. Continue driving until reaching the destination
  2. Refuse until a written order is shown
  3. Comply promptly, stop safely, and present the requested documents Correct answer.
  4. Stop only if the officer is in uniform and in a vehicle

Explanation

Drivers must comply with lawful directions from traffic officers, stopping in a safe place and producing the required documents. Refusal or delay can result in penalties.

Question 16Traffic laws, regulations and road signs

What does a broken white line between two lanes travelling in the same direction indicate?

  1. The lane to the right is reserved for buses
  2. Lane changing is prohibited at all times
  3. Lane changing is permitted when it is safe to do so Correct answer.
  4. The line marks the edge of the carriageway

Explanation

Broken white lines separate lanes of traffic moving in the same direction and may be crossed when safe. Continuous lines, by contrast, prohibit crossing.

Question 17Traffic laws, regulations and road signs

A driver is following a large truck on a wet highway. Which following distance is most appropriate?

  1. A distance of one vehicle length regardless of speed
  2. A greater distance than in dry conditions to allow for longer stopping distance Correct answer.
  3. A shorter distance to stay in the truck's slipstream
  4. The same distance as in dry conditions

Explanation

Wet roads reduce tyre grip and increase stopping distances, and spray from a large truck further reduces visibility. The safe following gap must therefore be increased compared with dry conditions.

Question 18Traffic laws, regulations and road signs

A driver sees a sign showing a truck inside a red circle with a diagonal line. What does this mean?

  1. Goods vehicles must stop for inspection ahead
  2. Goods vehicles must use the left lane only
  3. Goods vehicles are prohibited from proceeding beyond the sign Correct answer.
  4. Goods vehicles may proceed but must reduce speed

Explanation

A red circle with a diagonal line is a prohibitory sign, and the symbol inside identifies what is prohibited. A truck symbol therefore bans goods vehicles from the route beyond the sign.

Question 19Traffic laws, regulations and road signs

What is the correct action when an emergency vehicle approaches with sirens and flashing lights while a truck is in a traffic queue?

  1. Maintain position and speed to keep the queue orderly
  2. Stop in the middle of the lane and wait
  3. Accelerate to stay ahead of the emergency vehicle
  4. Make space to let it pass, moving aside safely if possible Correct answer.

Explanation

Drivers must give way to emergency vehicles on duty by clearing a path where it is safe to do so. Blocking or racing an emergency vehicle obstructs a response to an emergency.

Question 20Traffic laws, regulations and road signs

A driver is carrying a load that overhangs the rear of the vehicle. What is required under Saudi traffic rules?

  1. The load must be marked and secured so it does not endanger other road users Correct answer.
  2. The load may overhang provided the driver drives faster to reduce time
  3. Only the front overhang must be marked
  4. Overhanging loads are permitted without any marking if they are light

Explanation

Loads must be properly secured, and any projection that could endanger or mislead other road users must be clearly marked. An unmarked overhang is a hazard, especially at night.

Question 21Traffic laws, regulations and road signs

Why are heavy vehicles often required to use lower gear ranges when descending a long steep gradient?

  1. Engine braking helps control speed and reduces reliance on the foot brake Correct answer.
  2. Lower gears disengage the braking system
  3. Lower gears increase the vehicle's maximum speed
  4. Lower gears reduce fuel consumption on descents

Explanation

On long descents, engine braking in a low gear helps hold a safe speed and prevents the service brakes from overheating. Overheated brakes can fade and fail, which is especially dangerous for heavy vehicles.

Question 22Traffic laws, regulations and road signs

A driver approaches a junction where a stop line is painted across the lane and a stop sign is displayed. Where must the vehicle stop?

  1. Anywhere within ten metres after the sign
  2. At the stop line, before the crossing area Correct answer.
  3. Level with the sign post if the line is faint
  4. Only if another vehicle is approaching

Explanation

At a stop sign with a marked stop line, the vehicle must stop at the line so that the crossing and junction remain clear. If no line is visible, the stop is made at the sign itself.

Question 23Traffic laws, regulations and road signs

A truck is entering a roundabout. Which statement correctly describes the priority rule?

  1. The largest vehicle always has priority
  2. Priority depends on which driver signals first
  3. Entering traffic has priority over circulating traffic
  4. Traffic already circulating on the roundabout has priority Correct answer.

Explanation

At a roundabout, drivers entering must yield to traffic already circulating. Once on the roundabout, the driver should signal clearly before leaving at the intended exit.

Question 24Traffic laws, regulations and road signs

A driver must interpret a sign showing a red circle with a black '40' and a smaller plate beneath reading 'trucks'. What does it mean?

  1. The 40 km/h maximum applies to all vehicles at all times
  2. Trucks must travel at a minimum of 40 km/h
  3. Trucks must keep 40 metres from the vehicle ahead
  4. The 40 km/h maximum applies specifically to trucks Correct answer.

Explanation

A supplementary plate restricts the scope of the sign above it, so the speed limit applies only to the vehicle class named. Here the 40 km/h maximum applies to trucks rather than to all traffic.

Question 25Traffic laws, regulations and road signs

A driver's vehicle registration has expired and the vehicle is parked on a public road. What is the correct course of action?

  1. The vehicle may be driven if the driver carries the old registration card
  2. The vehicle may be driven if the insurance is still valid
  3. The vehicle may be driven during daylight hours only
  4. The vehicle must not be used on the road until the registration is renewed Correct answer.

Explanation

Driving or leaving an unregistered vehicle on a public road is not permitted; registration must be renewed before the vehicle is used. Insurance validity does not substitute for valid registration.

Question 26Traffic laws, regulations and road signs

Under Saudi traffic regulations, what does a solid yellow line along the centre of a two-way road mean for a heavy vehicle driver?

  1. Overtaking is allowed for trucks but not for cars
  2. The line only marks the edge of the carriageway and may be crossed freely
  3. Overtaking and crossing the line are prohibited Correct answer.
  4. Overtaking is permitted only if the road ahead is clear for a long distance

Explanation

A continuous (solid) yellow line separates opposing traffic streams and may not be crossed or straddled. Overtaking that requires crossing it is prohibited regardless of vehicle type. Drivers must stay in their lane until the line becomes broken.

Question 27Traffic laws, regulations and road signs

A truck driver sees a circular sign with a red border showing a black truck symbol on a white background. What does this sign require?

  1. Trucks are prohibited from proceeding beyond this point Correct answer.
  2. Trucks must reduce speed to 40 km/h
  3. Trucks must use the left lane only
  4. Trucks must switch on hazard lights

Explanation

A red-bordered circle is a prohibitory sign, and a vehicle symbol inside it bans that class of vehicle. A truck shown in a red circle therefore means goods vehicles may not enter or continue past the sign. The prohibition applies to the class of vehicle, not to a speed or lane instruction.

Question 28Traffic laws, regulations and road signs

A heavy vehicle driver is about to pass a school zone sign during morning hours. Which action best complies with Saudi traffic rules?

  1. Move to the centre of the road and accelerate past the zone
  2. Reduce speed and be ready to stop for children near the crossing Correct answer.
  3. Sound the horn continuously to warn children away from the kerb
  4. Maintain the posted highway speed because the school is set back from the road

Explanation

School zone signs warn of children who may enter the road unpredictably, so drivers must slow down and be prepared to stop. Heavy vehicles need a longer braking distance, which makes early speed reduction essential. Horn use and acceleration both increase danger near schools.

Question 29Traffic laws, regulations and road signs

What is the general rule for using a mobile phone while driving a heavy vehicle on a Saudi public road?

  1. Hand-held use is prohibited, and hands-free use must not distract the driver Correct answer.
  2. Use is allowed if the call lasts less than one minute
  3. Use is allowed for work-related calls by professional drivers
  4. Hand-held use is allowed when the vehicle is stopped at a red light

Explanation

Saudi traffic law prohibits using a hand-held mobile phone while driving, and drivers remain responsible for avoiding any distraction. Stopping at a signal is still part of driving in traffic, so it does not create an exemption. Professional drivers have no work-related exception.

Question 30Traffic laws, regulations and road signs

A truck driver intends to turn right at a junction and sees a red-and-white striped hazard marker board on the right side. What is the correct interpretation?

  1. The board shows the boundary of a weighbridge station
  2. The board indicates a permitted parking bay for trucks
  3. The board warns of a physical obstruction or kerb that must be avoided Correct answer.
  4. The board marks a lane that is reserved for buses

Explanation

Red-and-white striped hazard boards are placed at physical obstructions such as kerbs, islands or bridge piers to make them visible. The driver must steer clear of the obstruction, which is especially important for a large vehicle with a wide turning path. These boards do not grant or reserve any right to use the space.

Question 31Traffic laws, regulations and road signs

A heavy vehicle approaches a junction controlled by a flashing amber (yellow) signal. What does the signal require?

  1. Proceed with caution, giving way as required by the junction rules Correct answer.
  2. Proceed at normal speed because the signal is not operating
  3. Stop completely and wait for a green light
  4. Treat the junction as closed and turn back

Explanation

A flashing amber signal warns that the lights are not controlling priority, so drivers must proceed cautiously and apply the normal give-way rules of the junction. It is not a stop command and it does not close the road. A heavy vehicle should slow early because of its stopping distance.

Question 32Traffic laws, regulations and road signs

A driver of a loaded tipper truck is directed to a lane marked with a white diamond symbol on the road surface. What is the usual meaning of this marking?

  1. The lane is reserved for public transport or specific vehicle classes Correct answer.
  2. The lane is for overtaking only and must be vacated afterwards
  3. The lane is reserved for vehicles carrying hazardous goods
  4. The lane is a hard shoulder where trucks may stop to rest

Explanation

Diamond symbols painted on the carriageway commonly designate a reserved lane, typically for buses or other specified classes. Drivers of other vehicles must stay out of it during the hours shown on accompanying signs. The marking does not create an overtaking or rest area.

Question 33Traffic laws, regulations and road signs

A truck driver must park a heavy vehicle on a road at night in an area without street lighting. What does Saudi traffic practice require?

  1. Switch on parking lights so the vehicle can be seen from a distance Correct answer.
  2. Leave the engine running so the vehicle is visible
  3. Rely on reflective tape on the trailer alone
  4. Place a warning triangle only, with all lights off

Explanation

A large vehicle parked on an unlit road at night is a serious hazard, so its position must be made visible to approaching traffic with lights. Reflective markings help but are not a substitute for illumination. Leaving the engine running is unsafe and unnecessary.

Question 34Traffic laws, regulations and road signs

A driver is approaching a junction where the road narrows and a sign shows two arrows, one bending left and one bending right, in a blue circle. What does this sign indicate?

  1. The road splits into two one-way carriageways with equal priority
  2. The left branch is for trucks and the right branch for cars
  3. Traffic must pass on either side of an island or obstacle Correct answer.
  4. U-turn movements are permitted in both directions

Explanation

This mandatory blue sign tells drivers they may pass an island or obstruction on either side, following the arrow that matches their lane. It does not create separate vehicle-class routes or change priority. A heavy vehicle driver should select the side that suits the planned route early.

Question 35Traffic laws, regulations and road signs

A truck driver carrying an abnormal load needs to travel on a route where weight restrictions apply. Which statement reflects the correct approach under Saudi traffic rules?

  1. The driver may use any road provided the load is covered with a tarpaulin
  2. The driver may proceed if the load is only slightly over the limit
  3. The driver may travel at night to avoid enforcement checks
  4. The driver must obtain the required permit and follow the approved route and conditions Correct answer.

Explanation

Abnormal loads and vehicles exceeding posted weight limits require an authorisation from the competent authority, and the movement must follow the route and conditions attached to it. Covering the load addresses spillage, not weight compliance. Travelling at night to avoid checks is an offence.

Question 36Traffic laws, regulations and road signs

A heavy vehicle driver approaches a railway level crossing with no barriers and no attendant, and a stop sign is displayed. What must the driver do?

  1. Cross only after the vehicle ahead has cleared the crossing
  2. Sound the horn and cross without stopping
  3. Slow down and proceed if no train is visible
  4. Stop completely, look both ways, and cross only when clear Correct answer.

Explanation

Where a stop sign is posted at an unguarded level crossing, the driver must come to a full stop before the rails, check in both directions, and proceed only when certain no train is approaching. Heavy vehicles need extra time to clear the crossing, so a firm stop and check are essential. Slowing without stopping is insufficient when a stop sign is displayed.

Question 37Traffic laws, regulations and road signs

A truck driver is overtaking a slower vehicle on a two-lane road when a solid line begins ahead. What is the safest and lawful course of action?

  1. Abort the overtake and return behind the slower vehicle Correct answer.
  2. Straddle the solid line until the manoeuvre is finished
  3. Continue and cross the solid line only if the road ahead is clear
  4. Complete the overtake quickly before the solid line starts

Explanation

A solid line ahead means the overtaking manoeuvre cannot be lawfully completed, so the driver must abandon it and drop back. Heavy vehicles need a long distance to accelerate and return, which makes early judgement critical. Rushing or straddling the line creates a head-on risk.

Question 38Traffic laws, regulations and road signs

A driver of a heavy goods vehicle is found driving with a revoked driving licence. Under Saudi traffic rules, what is the primary legal consequence?

  1. Automatic transfer of the licence to the vehicle owner
  2. A requirement to retake only the practical driving test
  3. Criminal and traffic penalties, including fines and possible imprisonment Correct answer.
  4. A warning only, because the vehicle was otherwise roadworthy

Explanation

Driving while the licence is revoked or invalid is a serious offence that carries traffic penalties and can lead to criminal liability. The condition of the vehicle does not excuse the absence of a valid licence. Licences are personal and cannot be transferred to a vehicle owner.

Question 39Traffic laws, regulations and road signs

A truck driver causes a collision and leaves the scene without stopping, and no injuries result. How does Saudi traffic law treat this conduct compared with a hit-and-run involving injury?

  1. Fleeing is an offence in both cases, with heavier liability where injury results Correct answer.
  2. Only the injured party may report the incident, so fleeing is not an offence
  3. Both are treated identically because injury is irrelevant to fleeing
  4. Leaving the scene is lawful if the damage is minor and no one saw it

Explanation

Failing to stop after a collision is an offence regardless of injury, because drivers must stop, exchange details and report as required. Where injury results, the liability is more serious and additional penalties apply. The absence of witnesses or the scale of damage does not legalise leaving the scene.

Question 40Traffic laws, regulations and road signs

A heavy vehicle is descending a long gradient when the driver notices the service brakes fading. Which combination of actions best reflects correct practice and legal responsibility?

  1. Keep the brakes applied continuously and rely on the handbrake if needed
  2. Increase speed to cool the brakes with airflow and continue to the destination
  3. Continue without change because brake fade is normal on long descents
  4. Select a lower gear, use engine braking and a safe escape option, and stop to cool the brakes Correct answer.

Explanation

Brake fade on a long descent is managed by using a low gear and engine braking to limit speed, and by stopping safely to let the brakes cool if fade develops. Continuing with overheated brakes risks total loss of stopping ability, which is both dangerous and a breach of the driver's duty to keep the vehicle under control. Speed must never be increased to cool the brakes.

Question 41Heavy vehicle classification, licensing categories and load limits

Under Saudi heavy vehicle licensing rules, which licence category authorises a driver to operate a heavy truck or lorry used for general freight transport?

  1. Heavy vehicle licence (Category 4) Correct answer.
  2. Private car licence (Category 3)
  3. Light vehicle licence (Category 2)
  4. Motorcycle licence (Category 1)

Explanation

Heavy goods vehicles fall under the heavy vehicle licence category, which in the Saudi classification sits above light vehicle categories. A private car or light vehicle licence only covers vehicles below the heavy weight threshold, so it cannot authorise lorry driving.

Question 42Heavy vehicle classification, licensing categories and load limits

A candidate wants to drive a heavy truck that pulls a semi-trailer. Which additional authorisation is normally required on top of the basic heavy vehicle licence?

  1. A motorcycle endorsement
  2. A light equipment operator card
  3. A taxi passenger transport permit
  4. A trailer or articulated combination endorsement Correct answer.

Explanation

Towing a semi-trailer changes the vehicle into an articulated combination, and Saudi licensing practice requires a specific endorsement for trailers or articulated vehicles. The basic heavy vehicle licence alone covers rigid heavy trucks, not combination units.

Question 43Heavy vehicle classification, licensing categories and load limits

What is the maximum authorised laden weight used in Saudi Arabia to separate light vehicles from heavy vehicles for licensing purposes?

  1. 7,500 kg
  2. 1,500 kg
  3. 3,500 kg Correct answer.
  4. 12,000 kg

Explanation

Saudi vehicle classification follows the widely used threshold of 3,500 kg gross vehicle weight, above which a vehicle is treated as heavy. Vehicles at or below this figure are licensed as light vehicles and driven with a light vehicle licence.

Question 44Heavy vehicle classification, licensing categories and load limits

A rigid truck has an unladen weight of 9,000 kg and a permitted payload of 11,000 kg. What is its gross vehicle weight rating?

  1. 9,000 kg
  2. 11,000 kg
  3. 20,000 kg Correct answer.
  4. 2,000 kg

Explanation

Gross vehicle weight rating is the sum of the vehicle's own kerb weight and its maximum permitted payload. Adding 9,000 kg to 11,000 kg gives 20,000 kg, which is the figure that must not be exceeded on the road.

Question 45Heavy vehicle classification, licensing categories and load limits

Which document defines the maximum axle load and gross weight that a specific heavy vehicle is legally permitted to carry in Saudi Arabia?

  1. The third-party insurance policy
  2. The periodic technical inspection receipt
  3. The vehicle registration card (istimara) Correct answer.
  4. The driver's medical fitness certificate

Explanation

The registration card records the approved weights and configuration of the vehicle, and enforcement relies on those recorded limits. Insurance, medical and inspection documents do not set legal load capacities.

Question 46Heavy vehicle classification, licensing categories and load limits

How is the number of axles on a heavy vehicle combination relevant to Saudi load limits?

  1. More axles always reduce the permitted gross weight regardless of spacing
  2. Axle count is recorded for tax purposes only and has no load effect
  3. More axles allow a higher permitted gross combination weight within the legal bridge-formula limit Correct answer.
  4. Axle count matters only for tyre size selection

Explanation

Permissible gross weight rises with the number of load-carrying axles because the load is distributed over more contact points, subject to the bridge-formula and axle-spacing rules. Axle count therefore directly affects how much a combination may legally weigh.

Question 47Heavy vehicle classification, licensing categories and load limits

A driver loads a heavy truck so that the total weight is legal but one axle is overloaded. What is the correct assessment?

  1. The vehicle is overloaded because each axle must stay within its individual limit Correct answer.
  2. The vehicle is legal if the load is covered with a tarpaulin
  3. The vehicle is legal provided the tyres are correctly inflated
  4. The vehicle is legal because only total gross weight is enforced

Explanation

Load compliance is assessed both on total gross weight and on individual axle loads, so exceeding one axle limit is an offence even when the total is within the gross limit. Poor load distribution is the usual cause and must be corrected before moving.

Question 48Heavy vehicle classification, licensing categories and load limits

What is the primary purpose of enforcing a maximum permitted gross combination weight for articulated heavy vehicles?

  1. To limit the number of drivers employed by haulage companies
  2. To standardise the colour scheme of freight fleets
  3. To simplify customs declarations at border crossings
  4. To protect road pavement and bridges and to keep braking performance within safe limits Correct answer.

Explanation

Weight limits exist because pavement and bridge structures are designed for specific loads, and because braking distance grows with mass. Exceeding the limit damages infrastructure and compromises stopping performance.

Question 49Heavy vehicle classification, licensing categories and load limits

A heavy vehicle's registration shows a permitted gross weight of 26,000 kg. The driver adds a loaded trailer, raising the combination weight to 34,000 kg. What is the correct conclusion?

  1. The combination is legal because trailers are exempt from weight limits
  2. The combination is legal because the tractor unit alone is within its rating
  3. The combination is legal if the trailer has its own registration
  4. The combination exceeds the registered permitted weight and may not proceed as loaded Correct answer.

Explanation

The permitted gross combination weight applies to the whole unit, so adding a trailer load that pushes the combination above the registered figure is an overload. The tractor unit being within its own rating does not cure the excess.

Question 50Heavy vehicle classification, licensing categories and load limits

Which licence category would a driver need in order to operate a heavy bus carrying passengers?

  1. Motorcycle licence
  2. Heavy vehicle licence with passenger transport authorisation Correct answer.
  3. Agricultural tractor licence
  4. Light vehicle licence only

Explanation

Heavy buses fall under the heavy vehicle licence, and carrying passengers requires the corresponding passenger transport authorisation. A light vehicle licence covers only small passenger cars.