Al Dakhiliyah Royal Oman Police - Oman Heavy Vehicle Skills Test 2

Q: How many questions is the Al Dakhiliyah Royal Oman Police truck & bus theory test?

The official Royal Oman Police truck & bus theory test in Al Dakhiliyah has 30 questions and you need 23 correct (75%) to pass. This practice test has 22 questions.

Q: Is this the real exam?

These are original practice questions to help you revise. They are not the official Oman exam and the real question bank, format, fees and pass mark are set by the Royal Oman Police, and can change. Always confirm the current requirements with your driving school or the Royal Oman Police.

Q: Is this practice test free?

Yes. It is completely free, with no signup or payment, and you can retake it as many times as you like.

Q: What does the Al Dakhiliyah truck & bus theory test cover?

Road signs, traffic signals, right of way, roundabouts, speed limits, seat belts, penalties and safe-driving rules, plus the handling and safety topics specific to your vehicle.

Question 1

What is the required minimum following distance a heavy truck should maintain from the vehicle ahead on an Oman highway at 100 km/h?

Accepted Answer

At least 3 seconds, and more when loaded, to account for the longer braking distance of a heavy vehicle. Heavy vehicles need significantly more stopping distance than cars. A minimum 3-second gap is a practical baseline, but a fully loaded truck at 100 km/h may need 4 to 5 seconds or more. Drivers should use a fixed roadside object to count the gap. Tailgating is a major cause of rear-end crashes involving trucks.

Answer

The standard 2-second rule used by car drivers is sufficient for all vehicles

Answer

Five vehicle lengths, measured by road markings

Answer

Following distance is not regulated for heavy vehicles on highways

Question 2

What warning triangle or road flare rules apply if a heavy vehicle breaks down on an Oman highway?

Accepted Answer

Warning triangles must be placed behind the vehicle at sufficient distance to warn approaching traffic, and hazard lights must be activated. Oman requires drivers to place warning triangles at distances appropriate to the road speed to give approaching drivers enough time to react. On high-speed roads the first triangle should be placed further back than on slower urban roads. Hazard lights must also be activated. Passengers and the driver should move away from the carriageway to a safe position.

Answer

The driver only needs to activate hazard lights; triangles are optional for trucks

Answer

A single triangle placed directly behind the rear axle is sufficient regardless of speed limit

Answer

Triangles are only required at night; during daylight the hazard lights are enough

Question 3

What does an oversize load pilot vehicle (escort) do when accompanying a wide or long truck on Oman roads?

Accepted Answer

It travels ahead to warn oncoming traffic, check bridge and tunnel clearances, and coordinate with police, while a rear escort warns following traffic. A pilot or escort vehicle is used for loads that exceed standard width, height, or length limits. The front pilot warns oncoming drivers and can check clearances in advance. A rear escort warns overtaking or tailgating traffic. Royal Oman Police permission and a specific route plan are required for oversize moves, and travel may be restricted to certain hours.

Answer

It carries extra fuel for the oversize vehicle in case it runs low on a remote stretch

Answer

It drives behind the truck to push it uphill on steep sections of road

Answer

It records the journey on video to provide legal evidence if an accident occurs

Question 4

Why must a truck driver check overhead clearances before driving under a low bridge or gantry?

Accepted Answer

Because the posted height restriction may be lower than the truck's maximum load height, and a strike can collapse the bridge or destroy the load. Bridge strikes are a significant cause of deaths, injuries, and expensive damage. A driver must know the maximum height of their vehicle including the load and compare it with the posted clearance, allowing a margin for road camber and any surface build-up under old bridges. If in doubt, find an alternative route.

Answer

Because heavy vehicles are legally banned from all bridges regardless of height

Answer

Because gantries carry traffic cameras that reduce the speed limit for trucks

Answer

Because the load may shift when the vehicle passes over the shadow cast by the bridge

Question 5

A truck driver is carrying a load of steel coils on a flatbed trailer. After a sharp corner, the driver hears a loud bang. What should the driver do first?

Accepted Answer

Stop safely as soon as possible and inspect the load before continuing. A loud bang during or after cornering strongly suggests that a lashing has failed or the load has shifted. Steel coils are extremely heavy and will roll rapidly if unsecured. The driver must stop immediately and safely, check all lashings, and verify the load position before moving. A dislodged coil can cause fatal accidents.

Answer

Continue driving and report the noise at the next scheduled stop

Answer

Reduce speed and monitor the situation using the mirrors

Answer

Call the transport company from the cab while driving to report the incident

Question 6

What does the term 'kingpin setting' refer to on a semi-trailer, and why does it matter?

Accepted Answer

The fore-and-aft position of the kingpin relative to the trailer axles, which affects axle weight distribution and legal axle load compliance. The kingpin can often be set in different positions on the trailer's slider rail. Moving it forward puts more weight on the drive axle and less on the trailer axles; moving it back shifts weight to the trailer axles. Operators use this to keep individual axle loads within legal limits while maximising the legal payload.

Answer

The locking mechanism that prevents the trailer from detaching at speed on a motorway

Answer

The height adjustment of the fifth wheel to level the trailer floor for loading

Answer

The angle at which the trailer can articulate horizontally before the safety catch engages

Question 7

What colour are the two separate air brake lines (glad-hands) on a standard truck-trailer combination, and which colour is which?

Accepted Answer

Red is the emergency (supply) line and yellow is the service (control) line. The red glad-hand is the emergency (supply) line that provides air pressure to charge the trailer reservoir and hold the spring brakes off. The yellow glad-hand is the service line that applies the trailer brakes when the driver presses the foot brake. Connecting them incorrectly will cause the trailer brakes to behave dangerously.

Answer

Blue is the supply line and red is the control line

Answer

Both couplings are the same colour; they are identified by position on the chassis

Answer

Green is for the service brake and orange is for the emergency brake

Question 8

What happens if the red emergency air line between the tractor and trailer becomes disconnected while driving?

Accepted Answer

The trailer brakes automatically apply due to the loss of air pressure, which can cause the trailer to jack-knife. When the emergency (red) line loses pressure, the fail-safe spring brakes on the trailer automatically apply. If this happens at speed, the sudden braking of the trailer while the tractor continues to push forward can cause the trailer to swing sideways (jack-knife). Drivers must check that glad-hand connections are secure before every journey.

Answer

The trailer brakes disengage, leaving only the tractor brakes to stop the combination

Answer

The service brake pedal becomes harder to press but braking continues normally

Answer

The tractor automatically stops via the electronic stability programme

Question 9

When is jack-knifing most likely to occur with an articulated truck?

Accepted Answer

When the trailer brakes lock before the tractor brakes, especially on a slippery surface or during harsh emergency braking. Jack-knifing occurs when the trailer pivots around the fifth wheel because its wheels lock or skid while the tractor continues forward. This often happens during emergency braking on slippery roads or when the emergency air line disconnects. ABS helps prevent wheel lock-up but is not a substitute for smooth, progressive braking technique.

Answer

When the tractor is traveling in reverse and the steering is turned sharply

Answer

When the load is evenly distributed and the road surface is dry

Answer

When the engine retarder is engaged on a straight downhill slope

Question 10

A truck driver approaches a wadi crossing on an Oman desert road after heavy rain. The road surface under the water is not visible. What should the driver do?

Accepted Answer

Stop and wait or find an alternative route; never enter a flooded wadi crossing of unknown depth in a heavy vehicle. Flash floods in Oman can turn a dry wadi into a powerful torrent within minutes. The force of fast-moving water can sweep even a heavy truck off the road. The road surface may also be damaged or washed away below the water line. Drivers must never enter floodwater of unknown depth or speed. Wait until the water recedes or take an alternative route.

Answer

Drive through quickly at high speed to cross before the water level rises further

Answer

Enter slowly in low gear since the vehicle's high ground clearance makes it safe

Answer

Follow the tracks left by the previous vehicle that crossed successfully

Question 11

What is the legal obligation of a heavy vehicle driver in Oman if they are involved in a road accident?

Accepted Answer

Stop, not move the vehicle unless it is creating a further danger, assist the injured, and call the Royal Oman Police. Oman law requires all drivers involved in an accident to stop immediately, assist the injured, and call the Royal Oman Police (9999 or 1444 for emergencies). Moving the vehicle before police arrive can be required for safety but should be discussed with police if possible. Leaving the scene without reporting is a serious offence.

Answer

Note down the details and call the insurance company; police notification is not required for minor accidents

Answer

Move the vehicle off the road immediately to avoid blocking traffic, then exchange details

Answer

Continue to the nearest police station and report there within 24 hours

Question 12

What does a pre-trip walk-around inspection of a heavy vehicle involve?

Accepted Answer

Checking lights, tyres, brakes, fluid levels, load security, coupling (if applicable), mirrors, and any visible leaks or damage before moving the vehicle. A systematic walk-around inspection is the driver's first line of defence against mechanical failure. It covers all lights (including marker and brake lights), all tyres (pressure, tread, condition), brake connections, fluid leaks under the vehicle, load security, mirror position, and coupling security. This inspection is a legal requirement in Oman and should be logged.

Answer

Starting the engine and listening for unusual noises, then proceeding if the engine sounds normal

Answer

Checking the fuel level and tyre pressure gauge in the cab only

Answer

Reviewing the delivery paperwork and GPS route before departure

Question 13

What must a driver do if they discover a safety defect during a pre-trip inspection?

Accepted Answer

Report the defect and not drive the vehicle until the defect is repaired and the vehicle is cleared as roadworthy. Driving a vehicle with a known safety defect is illegal and dangerous. The driver must report the defect to the responsible manager or workshop, record it in the defect report system, and not move the vehicle until it is repaired and declared roadworthy. A verbal approval from a dispatcher does not override the legal requirement.

Answer

Note the defect in the logbook and proceed; minor defects are allowed if the journey is short

Answer

Drive to the nearest workshop and have it repaired during the journey

Answer

Inform the dispatcher verbally and then depart if the dispatcher approves

Question 14

A heavy vehicle driver has been awake for 22 hours due to a loading delay. What should the driver do?

Accepted Answer

Refuse to drive; the driver is severely fatigued, and driving in this state is as dangerous as drink-driving. Research shows that 17 to 19 hours of wakefulness impairs driving performance to a level equivalent to a blood alcohol concentration above the legal limit. At 22 hours of wakefulness the impairment is extreme. Energy drinks, cold air, and music provide only a brief and unreliable illusion of alertness. The only safe option is sleep before driving.

Answer

Take two energy drinks before departing to boost alertness for the journey

Answer

Drive slowly on minor roads to reduce risk while still completing the delivery

Answer

Drive with a window open and the air conditioning on full; this will keep the driver alert

Question 15

An articulated truck driver is reversing into a narrow loading bay. The banksman signals them to stop, but the driver has lost sight of the banksman in the mirrors. What must the driver do?

Accepted Answer

Stop immediately and do not move until the banksman is visible again or alternative guidance is established. The rule is absolute: if you lose sight of your banksman, stop. The banksman may have had to step into the path of the vehicle for any reason. Continuing to reverse blind is one of the most common causes of fatal reversing accidents. The driver must not move again until the banksman is visible and gives a clear proceed signal.

Answer

Continue reversing slowly because the banksman would have raised an alarm if there was a hazard

Answer

Sound the horn to signal the banksman to move to a visible position and continue reversing

Answer

Reverse until the vehicle touches something solid, as this indicates the bay is full

Question 16

What is the main difference between the spring-applied parking brake and the service brake on a truck with air brakes?

Accepted Answer

The parking brake is held off by air pressure and springs on automatically when pressure is lost; the service brake is applied by air pressure when the driver presses the pedal. In an air brake system the parking brake chambers contain strong springs that apply the brakes when air pressure is removed. They are held in the released position by compressed air during normal driving. The service brake is applied positively by air pressure when the pedal is pressed. This dual-circuit design is why air brake vehicles are fail-safe.

Answer

The parking brake is hydraulic and the service brake is pneumatic; they are completely separate systems

Answer

Both operate by the same air pressure, but the parking brake applies only to the drive axle and the service brake applies to all axles

Answer

The parking brake is mechanical cable-operated and only holds the vehicle on gradients up to 10 degrees

Question 17

What is the primary purpose of marker lights on a heavy vehicle?

Accepted Answer

To indicate the vehicle's width and length to other road users, especially at night and in low visibility. Marker lights define the outer dimensions of a heavy vehicle for other road users. At night or in dust and fog, a driver may underestimate the width of a truck and attempt to pass with insufficient clearance. Correct, functioning marker lights are a legal requirement on heavy vehicles in Oman.

Answer

To comply with tax and registration requirements and have no road safety function

Answer

To warn following drivers that the vehicle is braking

Answer

To indicate the vehicle's speed class to weigh-station operators

Question 18

A truck driver feels the vehicle pulling to one side when braking. What is the most likely cause and what should the driver do?

Accepted Answer

A brake imbalance or a seized brake on one side; the driver should stop safely and report the defect for inspection before continuing. Brake pull during braking indicates that braking force is uneven between the left and right sides. This could be a seized caliper, worn or contaminated brake lining, or imbalanced air pressure. It will worsen under heavy braking and can cause a spin or loss of control. The driver must stop and have the vehicle inspected.

Answer

The road is cambered; the driver should steer harder into the pull and continue

Answer

The load has shifted to one side; redistribute the load and continue the journey

Answer

The ABS is functioning normally; pulling during braking is expected on wet roads

Question 19

What is the main hazard when driving a high-sided truck through a narrow mountain pass in strong gusting wind?

Accepted Answer

Sudden lateral gusts can push the vehicle toward the edge of the road or into oncoming traffic. A high-sided vehicle in a mountain pass acts like a sail. A sudden strong gust can apply hundreds of kilograms of lateral force to the vehicle side, pushing it toward the cliff edge, a rockface, or an oncoming vehicle. Drivers must reduce speed, keep both hands firmly on the wheel, and be prepared for sudden gusts emerging from gaps in the terrain.

Answer

The wind creates a vacuum under the vehicle that reduces tyre grip on the road surface

Answer

Gusting wind slows the vehicle significantly, causing following vehicles to run into the rear

Answer

Wind noise makes it impossible to hear warning horns from oncoming vehicles in the pass

Question 20

What does a flashing amber light on top of a slow-moving oversize load vehicle indicate to other drivers?

Accepted Answer

The vehicle is an abnormal load or slow-moving vehicle that requires extra caution and may occupy more than one lane. Amber (yellow) rotating or flashing beacons are used on slow-moving, abnormal, or wide-load vehicles to warn other drivers to approach carefully. Other drivers should slow down, not attempt to squeeze past, and follow at a safe distance until it is safe to overtake. In Oman, oversize load movements often occur at night or dawn to reduce disruption.

Answer

The vehicle is a police or emergency vehicle that has priority over all other traffic

Answer

The driver is signalling that they intend to change lanes immediately

Answer

The vehicle is experiencing a mechanical fault and must be passed with caution

Question 21

Why is it important to check the truck's engine oil, coolant, and power-steering fluid levels before a long journey across Oman's desert interior?

Accepted Answer

High ambient temperatures increase fluid consumption and the risk of overheating; a breakdown in a remote desert location is life-threatening. Oman's extreme heat puts additional stress on the cooling system and increases evaporation of fluids. An overheating engine or sudden loss of power steering in a remote area of the desert interior can leave a driver stranded in dangerous heat. Pre-trip fluid checks are part of the legal roadworthiness requirement and are essential for driver survival in remote regions.

Answer

Desert dust enters the engine more quickly and dilutes these fluids within a few hours of driving

Answer

Fluid checks are only needed before journeys over 1000 kilometres

Answer

These checks are only necessary for new vehicles; established fleets are checked by mechanics weekly

Question 22

A driver of a multi-axle heavy vehicle approaches a weak-bridge sign showing '16.5t'. The vehicle's front axle is 7t, drive axle is 10t, and the rear trailer axle group is 18t. What should the driver do?

Accepted Answer

Not cross the bridge; the trailer axle group alone exceeds the 16.5t limit and the total GVW is also above the limit. A bridge weight restriction applies to the vehicle's total gross weight unless the sign specifically shows an axle or bogie limit. With axle loads of 7t + 10t + 18t the total GVW is 35 tonnes, more than double the 16.5-tonne limit. The vehicle must not cross; an alternative route must be found.

Answer

Cross slowly because the weight limit only applies if all axles are on the bridge simultaneously

Answer

Cross because only the gross vehicle weight matters and the front axle at 7t is below the limit

Answer

Cross because the weight limit applies to the heaviest single axle, and no single axle exceeds 18t

Al Dakhiliyah Royal Oman Police - Oman Heavy Vehicle Skills Test 2

Al Dakhiliyah Royal Oman Police - Oman Heavy Vehicle Skills Test 2

What this test covers

Frequently asked questions