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Al Shamal General Directorate of Traffic Truck & Bus

Practice mode· Heavy vehicle skills

Al Shamal General Directorate of Traffic - Qatar Heavy Vehicle Skills Test 1

First set of questions on truck and bus operation: braking distances, load stability, blind spots, turning space and vehicle checks. Master the skills unique to heavy vehicles.

Free sample · 1 of 10Full test: 22 questions, 21 to pass
Q1
Heavy vehicle

When securing a load on a flatbed truck, what is the minimum requirement regarding tie-down points?

An illustration of truck with load.
Pick an answer to see the reason.

The other 12 questions in this test

Read them all. The answer and the reason for each, and the timed 22-question run, are in the Qatar Driving Theory Online Practice Bank.

Unlock the answers - QAR 39
  1. Q11
    Heavy vehicle

    What is the risk of parking a heavy vehicle on a slope without chocking the wheels?

    Kerb parking; white truck A parked.
    • AAir-brake spring pressure can slowly leak, releasing the park brake and allowing the vehicle to roll
    • BThe engine will overheat if the vehicle is parked on a gradient without wheel chocks
    • CWheel chocks are required only for trailers, not rigid trucks
    • DThe vehicle cannot roll once the ignition is off because the transmission locks the wheels

    Answer and explanation in the bank

  2. Q12
    Heavy vehicle

    What is the purpose of the air dryer on a heavy truck's pneumatic brake system?

    Close-up of the car's brake pedal.
    • AIt dries the brake discs and drums after rain to restore braking performance
    • BIt cools the compressed air so it takes up less volume in the storage tanks
    • CIt removes moisture from the compressed air before it enters the brake tanks, preventing water from causing brake valve corrosion and freezing in cold weather
    • DIt filters engine oil mist out of the compressor outlet to prevent contamination of brake components

    Answer and explanation in the bank

  3. Q13
    Heavy vehicle

    What action should a heavy vehicle driver take when approaching a school zone during school arrival or departure times?

    The view through the windscreen from the driver's seat: a school zone with children near the road.
    • ASound the horn continuously to warn children of the truck's presence and continue at normal speed
    • BReduce speed to the school zone limit, be prepared to stop for pedestrians especially children, and do not attempt to overtake stopped vehicles near the school
    • CSchool zones apply only to cars and do not affect the route or speed of commercial vehicles
    • DKeep pace with other traffic; the volume of vehicles provides safety in numbers near schools

    Answer and explanation in the bank

  4. Q14
    Heavy vehicle

    A truck is loaded with steel coils on a flatbed. The coils are chained down but not blocked. What additional risk exists?

    An illustration of truck with load.
    • ASteel coils are heavy enough to remain stationary by gravity alone regardless of how they are secured
    • BRound coils can roll sideways if the chains stretch or the vehicle corners hard, potentially shifting the load and overloading one side
    • CThe main risk is chain corrosion from contact with the metal coils, not load movement
    • DCoils secured by chains cannot roll because the chain links interlock with the coil surface

    Answer and explanation in the bank

  5. Q15
    Heavy vehicle

    When are trucks and buses carrying more than 25 passengers banned from Doha city roads?

    The no goods vehicles road sign.
    • A6 to 8 am, 12 noon to 3 pm, and 5 to 8 pm
    • BAt no time; trucks may use city roads at any hour
    • COnly on Fridays
    • DOnly between midnight and 6 am

    Answer and explanation in the bank

  6. Q16
    Heavy vehicle

    What does a driver check when inspecting the fifth wheel lubrication before departure?

    An illustration of greased fifth-wheel plate.
    • AThat the fifth wheel plate is evenly coated with the correct type of grease and there are no dry spots or contamination with dirt or sand
    • BThat the fifth wheel locking handle is pointing downward to indicate it is locked
    • CThat the fifth wheel height is correct by measuring with a tape measure
    • DThat the fifth wheel plate is completely dry as grease attracts sand in desert conditions

    Answer and explanation in the bank

  7. Q17
    Heavy vehicle

    What is the correct use of a retarder (hydrodynamic or electromagnetic) on a heavy truck?

    Close-up of the car's brake pedal.
    • ATo boost engine power when climbing steep gradients by recovering exhaust energy
    • BTo apply automatic emergency braking if the driver does not respond to a collision warning
    • CTo lock the trailer wheels during coupling to prevent trailer roll-back
    • DTo provide sustained braking force on long descents without using the service brakes, reducing brake fade

    Answer and explanation in the bank

  8. Q18
    Heavy vehicle

    A heavy vehicle driver is held at a weighbridge and found to be 15% over the permitted gross vehicle weight. What is the most likely outcome under Qatar law?

    An illustration of truck with load.
    • AThe vehicle may be prohibited from continuing until the overload is removed, a financial penalty issued, and the driver and operator may face further legal action
    • BThe driver pays a small fee at the weighbridge and is permitted to continue the journey
    • COnly the vehicle owner is penalised; the driver faces no personal liability
    • DThe vehicle is escorted to the destination and a warning note placed on the licence

    Answer and explanation in the bank

  9. Q19
    Heavy vehicle

    What is the primary purpose of an exhaust brake (Jake brake) on a heavy vehicle?

    Close-up of the car's brake pedal.
    • ATo reduce exhaust emissions by burning unburnt fuel in the exhaust system
    • BTo use engine compression to slow the vehicle on descents without using the service brakes
    • CTo automatically apply the parking brake when the engine is switched off
    • DTo prevent the engine from over-revving when the accelerator is pressed too hard

    Answer and explanation in the bank

  10. Q20
    Heavy vehicle

    Before descending a long steep grade, what gear selection technique should a heavy vehicle driver use?

    Close-up of the car's brake pedal.
    • ABegin in a high gear and downshift gradually once the vehicle gains speed
    • BPlace the gearbox in neutral to save fuel and allow free-rolling
    • CUse the highest gear possible to keep engine revs low
    • DSelect a low gear before starting the descent and maintain it throughout

    Answer and explanation in the bank

  11. Q21
    Heavy vehicle

    What happens to braking performance if air pressure in a pneumatic brake system drops below the minimum safe level?

    Close-up of the car's brake pedal.
    • AThe service brakes switch to a hydraulic backup circuit
    • BSpring-loaded park brakes automatically apply, immobilising the vehicle
    • CThe brakes lock permanently until the air tank is refilled at a service station
    • DThe ABS system takes over to compensate for the reduced air pressure

    Answer and explanation in the bank

  12. Q22
    Heavy vehicle

    What is the correct way to test air brakes at the start of a shift?

    Close-up of the car's brake pedal.
    • ABuild air pressure to operating level, then apply the foot brake and check that pressure drops slowly within acceptable limits
    • BDrive at 30 km/h and perform a full emergency stop to confirm brake response
    • CApply and release the brakes five times rapidly to warm the brake linings
    • DOpen the drain valves to release any moisture and then drive normally

    Answer and explanation in the bank

Every answer above, with the rule it comes from, plus the full 22-question timed test.

Get the Qatar Driving Theory Online Practice Bank - QAR 39

What this test covers

Topics include road signs, traffic signals, right of way, roundabouts, speed limits, seat belts, fines and penalties, and the safe-driving rules specific to your vehicle category. Full question-by-question feedback with explanations is shown immediately after you finish the test above.

Frequently asked questions

How many questions is the Al Shamal General Directorate of Traffic truck & bus theory test?

The official General Directorate of Traffic truck & bus theory test in Al Shamal has 40 questions and you need 37 correct (92.5%) to pass. This practice test has 22 questions.

Is this the real exam?

These are practice questions to help you revise, written to the published rules and to what candidates report from the real test. They are not the official Qatar exam and the real question bank, format, fees and pass mark are set by the General Directorate of Traffic (Ministry of Interior) and the driving schools, and can change. Always confirm the current requirements with your driving school or the traffic department (for example via the Metrash service).

Is this practice test free?

The first 10 questions are free, with no signup, and each shows the answer and the reason. The full 22-question test, timed, is in the Qatar Driving Theory Online Practice Bank (QAR 39, one payment), with every question in the bank.

What does the Al Shamal 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.

Qatar driving test guides