Al Khor General Directorate of Traffic Truck & Bus
Practice mode· Heavy vehicle skillsAl Khor 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.
A bridge sign shows a 10-tonne maximum weight limit. Your fully loaded truck weighs 14 tonnes. What must you do?
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.
- Q11Heavy vehicle
When are trucks and buses carrying more than 25 passengers banned from Doha city roads?
- 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
- Q12Heavy vehicle
What does a driver check when inspecting the fifth wheel lubrication before departure?
- 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
- Q13Heavy vehicle
What is the correct use of a retarder (hydrodynamic or electromagnetic) on a heavy truck?
- 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
- Q14Heavy 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?
- 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
- Q15Heavy vehicle
When securing a load on a flatbed truck, what is the minimum requirement regarding tie-down points?
- AOne tie-down strap at each end of the load is always sufficient regardless of weight
- BOnly fragile goods require tie-downs; dense cargo is held by gravity alone
- CTie-downs are only required when travelling on highways above 100 km/h
- DThe combined rating of all tie-down straps or chains must equal at least the total weight of the cargo being secured
Answer and explanation in the bank
- Q16Heavy vehicle
Where should the heaviest items be placed when loading a rigid truck to optimise stability?
- AAs low as possible and centred over the drive axles
- BAt the very rear of the load bed to improve steering response
- CAs high as possible to keep them away from road spray
- DOn the right side of the load bed to counteract the driver's weight
Answer and explanation in the bank
- Q17Heavy vehicle
A truck's front steering axle has a maximum allowed axle weight of 6 tonnes. The axle is currently carrying 7.5 tonnes. What is the most likely consequence?
- AThe front axle overload will automatically transfer weight rearward through the suspension
- BThe vehicle's ABS system compensates and maintains normal steering feel
- COverloading only affects fuel consumption and has no safety consequence
- DOverloaded steering axle causes tyre overload, reduced steering control, and potential tyre failure
Answer and explanation in the bank
- Q18Heavy vehicle
Before loading a truck, where do you find the most weight it may legally carry?
- AIt is the same for every truck, 30 tonnes
- BOn the vehicle's registration documents and the manufacturer's plate, and you must not exceed it
- CThere is no limit as long as the tyres are not flat
- DOnly the driving school can tell you
Answer and explanation in the bank
- Q19Heavy vehicle
A large truck has a blind spot directly in front of the cab extending several metres ahead. What should the driver do before moving off from a stop?
- ASound the horn twice and move off slowly; this is sufficient warning
- BWalk around the vehicle to check for children, animals, or obstacles before climbing into the cab and moving off
- CUse only the side mirrors; the front blind spot cannot be managed on commercial vehicles
- DRoll forward a few centimetres, pause, then continue; this allows time for pedestrians to move
Answer and explanation in the bank
- Q20Heavy vehicle
What is tail swing, and why is it dangerous when a truck makes a sharp right turn?
- AThe rear of the trailer swings left as the front turns right, potentially striking pedestrians or vehicles on the left side
- BThe drive axle loses traction and the rear of the truck slides forward
- CThe trailer hitch swings upward when the truck accelerates out of a turn
- DThe steering wheel swings back to centre after a turn, causing loss of directional control
Answer and explanation in the bank
- Q21Heavy vehicle
Why do articulated trucks need extra road width when making tight turns?
- AThe trailer's rear wheels follow a smaller radius than the tractor's front wheels, cutting the corner inward
- BThe long wheelbase makes the steering wheel difficult to turn quickly
- CThe fifth wheel joint allows the trailer to slide outward beyond the tractor's path
- DWide tyres on the drive axle increase the turning radius on both sides equally
Answer and explanation in the bank
- Q22Heavy vehicle
Which combination of conditions most increases rollover risk for a high-sided curtain-sided trailer?
- ALow speed, gradual steering, and a uniformly distributed load
- BHigh speed, sudden steering input, and a raised centre of gravity from a top-heavy load
- CFull air-tank pressure and a fully loaded trailer on a straight motorway
- DUsing engine braking on a downhill gradient with a lightly loaded trailer
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 39What 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 Khor General Directorate of Traffic truck & bus theory test?
The official General Directorate of Traffic truck & bus theory test in Al Khor 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 Khor 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.