Northern Borders General Dept. of Traffic Truck & Bus
Practice mode· Heavy vehicle skillsNorthern Borders General Dept. of Traffic - Saudi 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.
Why is correct load distribution important in a heavy truck or trailer?
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 Saudi Driving Theory Online Practice Bank.
- Q11Heavy vehicle
What precaution must a bus driver take at an unsupervised bus stop when children are boarding or alighting?
- ASound the horn twice to signal that children should move and then drive away slowly
- BBegin moving as soon as the doors have closed, regardless of children's position
- CWait until all children have moved clear of the bus and onto the pavement before moving off, and check mirrors thoroughly for children who may be in blind spots
- DOnly the last child off the bus must be seen in the mirror before moving
Answer and explanation in the bank
- Q12Heavy vehicle
A bus driver discovers that the emergency exit door at the rear of the bus is jammed and will not open. What should the driver do?
- AContinue operating the route because the front door provides an alternative exit
- BInform passengers of the problem verbally and ask them to use the front door only in an emergency
- CTake the bus out of service immediately and not carry passengers until the emergency exit is repaired and functioning correctly
- DBlock the rear seats off and continue operating with the reduced passenger capacity
Answer and explanation in the bank
- Q13Heavy vehicle
A bus driver is involved in a minor collision that damages the front bumper. The bus is otherwise driveable and passengers are uninjured. What is the correct procedure?
- AStop, secure the vehicle, check all passengers for injury, call the emergency services and the operator to report the incident, and follow official instructions before moving
- BContinue to the next stop and report the damage at the depot at the end of the shift
- CAsk passengers if they are okay and, if they say yes, continue the route without reporting
- DExchange details with the other driver and continue immediately without reporting to the operator
Answer and explanation in the bank
- Q14Heavy vehicle
What marking system identifies a heavy vehicle carrying dangerous goods on Saudi roads?
- AA single red flag attached to the rear of the vehicle
- BA yellow flashing light on the roof of the cab is the only requirement
- CNo special markings are required if the cargo is in sealed containers
- DOrange-coloured hazard identification number panels and UN number plates on the front and rear, plus diamond-shaped hazard warning labels on the sides and ends of the tank or container
Answer and explanation in the bank
- Q15Heavy vehicle
What document must a driver of a dangerous-goods vehicle carry at all times during transport?
- AOnly the vehicle registration and driving licence are required, the same as for any other truck
- BA letter from the loading company confirming that the cargo has been checked
- CA certificate of insurance covering the dangerous goods
- DA transport document listing the UN number, proper shipping name, hazard class, packing group, and emergency response information for each dangerous good carried
Answer and explanation in the bank
- Q16Heavy vehicle
A truck carrying flammable liquids is involved in an accident and the tank begins to leak. What is the driver's immediate priority?
- AMove away from the vehicle, warn other road users, call the emergency services, provide the transport document to rescuers, and prevent ignition sources from approaching
- BAttempt to repair the leak using tools from the cab to prevent spillage
- CDrive the vehicle to the nearest fire station at reduced speed
- DCover the leak with a tarpaulin and wait for the operator to send a recovery vehicle
Answer and explanation in the bank
- Q17Heavy vehicle
Which dangerous goods class covers compressed gases such as LPG and oxygen cylinders carried on a heavy truck?
- AClass 2, which covers compressed, liquefied, or dissolved gases including flammable, non-flammable, and toxic gases
- BClass 3, which covers flammable liquids
- CClass 5, which covers oxidising substances and organic peroxides
- DClass 8, which covers corrosive substances
Answer and explanation in the bank
- Q18Heavy vehicle
What is the purpose of the range-change (hi/lo) splitter on a heavy truck gearbox?
- AIt selects four-wheel drive for off-road driving conditions
- BIt controls the differential lock on the rear axle
- CIt changes the fuel map between economy and power modes
- DIt doubles the number of available gear ratios by providing a high and low range for each main gearbox position, giving the driver finer control of engine speed and tractive effort
Answer and explanation in the bank
- Q19Heavy vehicle
When should a heavy truck driver engage the differential lock on the drive axle?
- AOn all motorway driving to improve stability at high speed
- BWhen descending steep hills to improve braking
- CWhenever the vehicle is loaded to maximum gross weight
- DOnly when one or more drive wheels are spinning on a slippery or soft surface and the vehicle cannot move; it must be disengaged as soon as traction is regained
Answer and explanation in the bank
- Q20Heavy vehicle
A driver is climbing a steep grade in a split gearbox truck and needs to change from 5-Hi to 6-Lo. What is the correct sequence?
- AFirst move the range switch to Lo, then wait for the gearbox to change range automatically before moving the main lever
- BFully depress the clutch, select neutral, change the range switch, release the clutch, then re-depress the clutch and select 6
- CRange changes should never be made on uphill gradients; pull over and stop first
- DAt the correct engine rev for the upshift, move the main lever to position 6 while simultaneously pre-selecting Lo on the range switch; the change completes cleanly mid-shift
Answer and explanation in the bank
- Q21Heavy vehicle
What is the kingpin on an articulated trailer?
- AThe central locking pin that holds the trailer's cargo doors shut during transit
- BA safety pin that prevents the landing legs from accidentally folding while the trailer is coupled
- CThe pin that connects the service brake air line to the trailer brake system
- DA steel pin on the underside of the trailer's front skid plate that locks into the fifth wheel of the tractor unit to form the articulation joint
Answer and explanation in the bank
- Q22Heavy vehicle
A driver notices that the kingpin has visible wear and cracks after coupling. What action must be taken?
- ADrive only at low speed to the nearest workshop, because the kingpin is unlikely to fail completely on a short journey
- BLubricate the kingpin with grease and tighten the fifth wheel jaw to compensate for the wear
- CDo not move the vehicle; the trailer must be taken out of service for inspection and repair of the kingpin before it is used
- DComplete the current delivery and report the condition at the next scheduled maintenance
Answer and explanation in the bank
Every answer above, with the rule it comes from, plus the full 22-question timed test.
Get the Saudi Driving Theory Online Practice Bank - SAR 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 Northern Borders General Dept. of Traffic truck & bus theory test?
The official General Dept. of Traffic truck & bus theory test in Northern Borders has 35 questions and you need 22 correct (63%) 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 Saudi exam and the real question bank, format, fees and pass mark are set by the General Department of Traffic (Moroor) and the driving schools, and can change. Always confirm the current requirements with your driving school or the traffic department.
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 Saudi Driving Theory Online Practice Bank (SAR 39, one payment), with every question in the bank.
What does the Northern Borders 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.