I85PREP
⌘ K
Finland Category C lorry theory foundations study materials
Finland Category C lorry theory foundations study resources

Finland Category C lorry theory foundations practice questions

One question at a time. Build your Finland Category C lorry theory foundations understanding.

First 50 of 190 questions. Each one lists the choices, the correct answer, and an explanation. The checker at the top of this page saves progress in this browser when it is available.

Continue in the practice tool above to load more questions, 50 at a time.

Question 1Incident Environment

What should you do if your vehicle breaks down on a high-speed road?

  1. Move as far from traffic as safely possible, make the vehicle visible, and get people to a safe place Correct answer.
  2. Stay seated without lights because help will see you
  3. Stand behind the car in the traffic lane
  4. Try to repair the car in the lane

Explanation

A breakdown on a high-speed road creates major secondary-crash risk. Make the vehicle visible, protect occupants, and call for help from a safe location away from traffic.

Question 2Finnish Framework

What training topic does Traficom specifically mention for lorry driving instruction?

  1. Anticipation: identifying and avoiding dangerous situations Correct answer.
  2. Learning to ignore tachograph information
  3. Using maximum speed in all conditions
  4. Memorising leaked official test images

Explanation

Traficom describes lorry instruction as including responsible, safe, economical, and flexible driving, with anticipation to identify and avoid dangerous situations. This is directly relevant to the risk-identification part of the theory test.

Question 3Finnish Framework

Which statement about commercial lorry transport is correct?

  1. Commercial lorry drivers also need valid professional competence Correct answer.
  2. A category C licence alone always replaces professional competence
  3. Professional competence is only for motorcycle couriers
  4. Professional competence is checked only after age 68

Explanation

Traficom's lorry page states that all lorry drivers working in commercial transport must also have valid professional competence. The driving licence and professional qualification are separate requirements.

Question 4Truck Technology

Why must a truck driver check mirrors before moving off?

  1. Large blind spots can hide pedestrians, cyclists, or vehicles close to the cab Correct answer.
  2. Mirrors replace the need to signal
  3. A truck has no blind spots if it has ABS
  4. The rear view is only needed on motorways

Explanation

A category C vehicle is wide, long, and high, so areas around the front, sides, and rear can be hidden. Moving off safely requires mirror use, blind-spot checks, and slow predictable control.

Question 5Truck Technology

Which vehicle-condition check is most important before a dark winter drive?

  1. Lights, reflectors, mirrors, windows, tyres, and visible load markings Correct answer.
  2. Only the radio volume
  3. Only the colour of the cab
  4. Whether the route looks short on navigation

Explanation

Dark winter conditions make visibility and grip critical. A truck driver should confirm that lights and reflectors work, mirrors and windows are clear, tyres are suitable, and any load markings are visible.

Question 6Truck Technology

What should you do if your lorry's warning light indicates a serious brake-system fault before departure?

  1. Do not drive until the fault is resolved or professionally assessed Correct answer.
  2. Drive only on small roads
  3. Cover the warning light and continue
  4. Carry a lighter load and ignore the fault

Explanation

Braking is a critical safety system in a heavy vehicle. A serious brake warning must be treated as a stop-and-check issue before entering traffic.

Question 7Truck Technology

Why should loose snow and ice be removed from a lorry before departure?

  1. They can block the driver's view, hide lights, or fall onto other road users Correct answer.
  2. They improve traction by adding weight
  3. They are useful warning markers for following traffic
  4. They are only a cosmetic issue

Explanation

Snow and ice on a large vehicle can reduce visibility and become dangerous falling debris. Clearing windows, mirrors, lights, steps, and loose roof snow is part of safe winter preparation.

Question 8Truck Technology

You approach a low bridge with an unfamiliar truck body and load. What should you do?

  1. Know the vehicle's height and route restrictions before entering; stop safely if clearance is uncertain Correct answer.
  2. Rely on the bridge being high enough for all traffic
  3. Drive through slowly and listen for contact
  4. Use hazard lights to make the bridge taller

Explanation

Truck drivers must know the dimensions of their vehicle and load. If clearance is uncertain, the safe response is to stop before the hazard and choose a legal route or verify clearance.

Question 9Truck Technology

A road sign prohibits lorries beyond a stated mass. What must a category C driver do?

  1. Obey the sign and choose a permitted route if the lorry or combination exceeds the limit Correct answer.
  2. Ignore it because category C drivers are trained
  3. Proceed if the road looks wide
  4. Unload only after crossing the restricted road

Explanation

Regulatory signs and weight restrictions are designed to protect roads, bridges, and traffic safety. A lorry driver must know the vehicle's mass and comply before entering the restricted section.

Question 10Truck Technology

Why should a truck driver avoid unnecessary lane changes in dense traffic?

  1. Blind spots, vehicle length, and slower acceleration make each lane change higher risk Correct answer.
  2. Lane changes cool the brakes
  3. Heavy vehicles are invisible to traffic cameras
  4. Other drivers always predict the truck's path

Explanation

A category C vehicle has large blind spots and needs more time and space to change lanes. Planning the lane early reduces sudden decisions and side-swipe risk.

Question 11Truck Technology

You approach a roundabout in a high-sided loaded lorry. Which technique is safest?

  1. Reduce speed before entry, choose the correct lane early, and steer smoothly Correct answer.
  2. Enter fast so the truck spends less time in the roundabout
  3. Brake hard while turning if the load leans
  4. Use the wrong lane if it avoids slowing

Explanation

Roundabouts combine turning forces, lane discipline, and vulnerable-user conflicts. A high or heavy load needs slower entry and smooth steering to reduce rollover and side-swipe risk.

Question 12Truck Technology

What should you do when descending a long hill in a heavy lorry?

  1. Select a suitable low gear or retarder strategy before the descent and avoid overheating the service brakes Correct answer.
  2. Coast in neutral to save fuel
  3. Use only repeated hard service-brake applications near the bottom
  4. Turn off engine braking to make the vehicle quieter

Explanation

A long descent can overheat service brakes if speed is not controlled early. Heavy-vehicle driving requires planning the gear and auxiliary braking before speed builds.

Question 13Truck Technology

Why should you avoid resting your foot on the brake pedal during normal driving?

  1. It can overheat brakes, confuse following drivers, and reduce braking reserve Correct answer.
  2. It keeps the brake system fully charged
  3. It makes the load more stable
  4. It replaces the need for following distance

Explanation

Dragging the brakes creates heat and may show brake lights when you are not actually slowing. In a heavy vehicle, conserving braking capacity is essential for genuine hazards.

Question 14Truck Technology

What is the main hazard when reversing a lorry in a yard?

  1. People or vehicles may be hidden in blind spots behind and beside the lorry Correct answer.
  2. Reversing always has priority over pedestrians
  3. The lorry becomes shorter when reversing
  4. Mirrors show every area directly behind the vehicle

Explanation

Reversing a large vehicle has severe blind-spot risk. The driver should use available assistance, check the route, reverse slowly, and stop if any person or obstacle is uncertain.

Question 15Truck Technology

When parking a lorry for loading or unloading, what is the safest basic principle?

  1. Choose a legal place where the vehicle is visible and does not block sight lines, crossings, or traffic flow Correct answer.
  2. Park partly on a crossing to shorten the carry distance
  3. Leave the engine running and doors open in any traffic lane
  4. Stop wherever hazard lights are visible

Explanation

Loading and unloading must be planned so the lorry does not create a new hazard. Visibility, legal parking rules, pedestrian paths, and traffic flow all matter.

Question 16Truck Technology

A loading dock worker signals you back, but you lose sight of them in the mirror. What should you do?

  1. Stop immediately until you regain clear communication Correct answer.
  2. Continue because the signal was valid a moment ago
  3. Accelerate to complete the manoeuvre quickly
  4. Use the horn and keep reversing

Explanation

If the guide disappears from view, the situation is no longer controlled. Stop, re-establish communication, and continue only when the path is confirmed clear.

Question 17Truck Technology

Why must a truck driver secure doors, tail lifts, and side curtains before moving?

  1. Loose equipment can open, strike people, shed cargo, or change vehicle width Correct answer.
  2. They close automatically at 50 km/h
  3. It matters only for international trips
  4. It is optional if the route is under one kilometre

Explanation

A lorry's bodywork and loading equipment are part of safe roadworthiness. Unsecured doors or curtains can create immediate danger in traffic or yards.

Question 18Truck Technology

Why should a lorry driver plan routes before entering an unfamiliar city centre?

  1. To avoid unsuitable bridges, narrow streets, mass restrictions, delivery-time limits, and difficult turns Correct answer.
  2. To avoid having to use mirrors
  3. Because navigation instructions override traffic signs
  4. To make legal restrictions optional

Explanation

Heavy vehicles face restrictions that may not affect passenger cars. Route planning reduces illegal entry, reversing in public streets, bridge strikes, and conflicts with vulnerable road users.

Question 19Truck Technology

A lorry's tyres are unevenly worn before a trip. Why is this serious?

  1. Tyre condition affects braking, steering, stability, and risk of blowout Correct answer.
  2. Tyres matter only during the driving test
  3. Uneven wear improves grip on snow
  4. A heavy load hides tyre defects

Explanation

Tyres are the contact between the heavy vehicle and the road. Uneven wear may indicate mechanical faults and can reduce grip or cause failure under load.

Question 20Truck Technology

What should you do if a mirror is cracked or wrongly adjusted before departure?

  1. Correct or repair it before driving because observation depends on it Correct answer.
  2. Drive only on roads with no cyclists
  3. Use the passenger to shout if someone is nearby
  4. Rely only on the central interior mirror

Explanation

Category C vehicles depend heavily on external mirrors for side and rear observation. A defective or badly adjusted mirror increases blind-spot risk during turns, lane changes, and reversing.

Question 21Truck Technology

What should a category C driver consider when entering a tunnel?

  1. Height restrictions, lane signals, lights, following distance, and whether there is space ahead Correct answer.
  2. Only radio reception
  3. Whether the tunnel will clean the vehicle
  4. That all tunnels allow every heavy vehicle

Explanation

Tunnels reduce escape options and may have restrictions or lane-control signals. A lorry driver should use correct lights, keep distance, and avoid entering if traffic ahead may trap the vehicle in a poor position.

Question 22Truck Technology

You are driving a loaded lorry downhill on an icy road and see a queue beyond a bend. What is the best risk-control sequence?

  1. Reduce speed before the bend, use suitable low gear or auxiliary braking, increase distance, and brake smoothly before the queue Correct answer.
  2. Enter the bend at the limit and brake hard after seeing the queue
  3. Coast in neutral to avoid wheel slip
  4. Move into the opposite lane before checking oncoming traffic

Explanation

This combines low grip, limited sight distance, heavy mass, and brake-management risk. The safest answer controls speed before the bend and preserves steering and braking grip.

Question 23Truck Technology

You must reverse into a loading bay across a footpath. What is the safest approach?

  1. Stop, assess the route, use a competent guide if needed, reverse slowly, and stop whenever a person enters the danger area Correct answer.
  2. Reverse steadily because pedestrians must avoid workplaces
  3. Keep reversing if the reversing alarm is sounding
  4. Start the manoeuvre without checking behind to avoid delaying traffic

Explanation

Reversing across a footpath combines blind spots and vulnerable-road-user risk. Warning devices help, but the driver remains responsible for ensuring the path is clear.

Question 24Truck Technology

A lorry enters a narrow street with parked cars on both sides and an oncoming bus. What is the best decision-making principle?

  1. Slow or stop early where there is room, communicate predictably, and avoid squeezing through a gap that may close Correct answer.
  2. Continue because larger vehicles decide priority by size
  3. Mount the pavement to maintain progress
  4. Force the oncoming bus to reverse by moving into the gap

Explanation

Narrow streets create side-swipe, mirror-strike, and vulnerable-user risks. A professional driver should choose a controlled meeting point and avoid making pedestrians or cyclists use unsafe space.

Question 25Truck Technology

A route includes a steep hill, a roundabout at the bottom, and a high centre-of-gravity load. What is the safest planning answer?

  1. Control speed before the descent, preserve brakes, approach the roundabout slowly, and steer smoothly Correct answer.
  2. Let the lorry accelerate downhill and brake in the roundabout
  3. Choose a higher gear to increase speed before the turn
  4. Rely on the load straps to prevent rollover

Explanation

This scenario combines brake fade risk, speed management, and rollover risk. Load straps secure cargo but do not cancel physics from a high centre of gravity and excessive entry speed.

Question 26Truck Technology

A category C lorry has a tachograph, but the driver is taking only a short local trip. What is the safest theory-test attitude toward the equipment?

  1. Treat required equipment as part of the vehicle's operating condition and follow applicable rules Correct answer.
  2. Ignore it because short trips are never recorded
  3. Remove the card or device to avoid errors
  4. Use the tachograph screen instead of mirrors

Explanation

Traficom lists a tachograph as required equipment for a category C examination lorry, and real professional operation may involve tachograph obligations. A driver should understand and follow the applicable rules rather than treating equipment as decoration.

Question 27Truck Technology

A lorry is partly loaded, and the driver feels the vehicle pull to one side under braking. What should the driver suspect first?

  1. A vehicle defect, uneven braking, tyre problem, or load-distribution issue requiring a safe stop and check Correct answer.
  2. Normal behaviour of every loaded lorry
  3. A sign that braking distance is shorter
  4. Proof that the road is always at fault

Explanation

Pulling under braking is a warning of possible mechanical or loading problems. A heavy vehicle should not continue normally until the cause is assessed because the next braking event may be more severe.

Question 28Priority Signs

What is the safest basic response when a pedestrian is near a crossing in front of your lorry?

  1. Slow early and be prepared to stop smoothly Correct answer.
  2. Maintain speed because the lorry is heavier
  3. Sound the horn so the pedestrian waits
  4. Look only at traffic behind you

Explanation

A heavy vehicle needs more stopping space, and a pedestrian crossing is a high-risk area. Early smooth braking protects the pedestrian and also gives following traffic time to react.

Question 29Priority Signs

What should a truck driver do before a right turn in city traffic?

  1. Check mirrors and blind spots for cyclists and pedestrians before and during the turn Correct answer.
  2. Swing right as fast as possible to shorten the turn
  3. Trust that cyclists will always stay behind the truck
  4. Use hazard lights instead of turn signals

Explanation

Right turns with a large vehicle create side-swipe and run-over risks for cyclists and pedestrians near the cab and along the side. The driver must signal early, slow down, and keep checking mirrors and blind spots.

Question 30Priority Signs

What does a red octagonal sign mean?

  1. Stop Correct answer.
  2. Give way without stopping
  3. No parking
  4. Priority road

Explanation

The red octagonal sign is the stop sign. A truck driver must stop fully where required and only proceed after checking that the large vehicle can enter safely.

Question 31Priority Signs

What does an inverted give-way triangle require?

  1. Yield to traffic on the road you are entering or crossing Correct answer.
  2. Accelerate because you have priority
  3. Stop only if police are present
  4. Ignore pedestrians because it applies only to cars

Explanation

A give-way sign means you must yield to traffic on the road you are entering or crossing. With a lorry, you should judge whether the whole vehicle can clear the conflict area without forcing others to brake.

Question 32Priority Signs

What is the best eco-driving habit for a category C vehicle?

  1. Anticipate early so you can keep speed steady and avoid unnecessary braking Correct answer.
  2. Accelerate hard between every traffic light
  3. Idle for long periods to keep the cab ready
  4. Ignore tyre pressure because the engine is powerful

Explanation

Traficom links lorry instruction with safe, economical, and flexible driving. Anticipation, steady speed, correct gear use, and avoiding unnecessary stops reduce fuel use and risk.

Question 33Priority Signs

At an equal-priority intersection, a van approaches from your right while you drive a lorry. What is the rule-based action?

  1. Give way to traffic from the right and slow early enough for the lorry's braking distance Correct answer.
  2. Continue because heavier vehicles have priority
  3. Stop only if the van is also a lorry
  4. Use the horn to claim priority

Explanation

At an equal-priority intersection, traffic from the right normally has priority. A lorry driver must apply the rule with extra anticipation because stopping and restarting take more time and space.

Question 34Priority Signs

A cyclist is riding beside your lorry near the rear wheels as you approach a right turn. What is the safest plan?

  1. Slow, keep the cyclist in view, and do not turn across their path Correct answer.
  2. Turn immediately because the cyclist should stop
  3. Move closer to the kerb to squeeze the cyclist out
  4. Ignore the cyclist once your signal is on

Explanation

A cyclist beside a truck may be hidden in mirrors or trapped by the turn. The driver must avoid cutting across the cyclist's path and should wait if the cyclist's position is uncertain.

Question 35Priority Signs

Why are children near a stopped bus especially important in a truck theory image?

  1. They may run into the road from hidden positions and are hard to see from a high cab Correct answer.
  2. They always wait for the truck to pass
  3. They are protected by the bus from every direction
  4. The truck's height makes children easier to see directly in front

Explanation

Children can be hidden by the bus, parked vehicles, snowbanks, or the truck's own blind spots. A heavy vehicle driver should slow early and be ready to stop.

Question 36Priority Signs

Which action best protects the environment and safety when approaching a red light in a lorry?

  1. Ease off early, use engine braking where appropriate, and avoid harsh stop-start driving Correct answer.
  2. Accelerate toward the light and brake late
  3. Shift to neutral and coast with poor control
  4. Keep the engine at high revs while waiting

Explanation

Early anticipation reduces fuel consumption, brake wear, and rear-end risk. A lorry driver should keep control while making smooth speed changes.

Question 37Priority Signs

A navigation app suggests a shortcut through a residential area with a lorry restriction sign. What should you do?

  1. Follow the road sign, not the app, and choose a permitted route Correct answer.
  2. Follow the app because it has current traffic data
  3. Enter slowly because restrictions apply only at rush hour
  4. Ask a passenger to remove the sign from the route

Explanation

Drivers are responsible for obeying current signs, signals, and restrictions. Navigation is a support tool, not a legal authority.

Question 38Priority Signs

A truck is sprayed with slush and its rear lights become dirty. What should the driver do at the next safe opportunity?

  1. Clean lights and reflectors so the lorry remains visible Correct answer.
  2. Ignore it because rear lights are optional in daylight
  3. Drive faster to blow the slush off
  4. Use high beams as a substitute for rear visibility

Explanation

Dirty lights and reflectors make a large vehicle harder to see, especially in winter darkness or spray. Cleaning them is a simple safety control during breaks or safe stops.

Question 39Priority Signs

You approach roadworks with temporary signals that conflict with your usual route priority. What should guide you?

  1. Follow temporary signs, signals, and authorised directions at the worksite Correct answer.
  2. Follow only the permanent priority-road sign
  3. Drive through if your delivery is late
  4. Use the horn so workers move aside

Explanation

Roadworks change the normal traffic environment and can introduce workers, narrowed lanes, temporary signals, and altered priorities. The driver must slow and follow the current controls.

Question 40Priority Signs

At a railway level crossing with warning lights operating, what must a lorry driver do?

  1. Stop and wait until it is clearly permitted and safe to cross Correct answer.
  2. Cross quickly because the lorry is high
  3. Stop on the tracks if traffic ahead is slow
  4. Follow a smaller car onto the crossing without checking exit space

Explanation

A level crossing requires strict compliance with warning signals and enough space beyond the crossing before entering. A long or slow lorry must never be trapped on the tracks.

Question 41Priority Signs

Why should you leave extra side clearance when passing a cyclist with a lorry?

  1. Air movement, vehicle width, and minor steering corrections can endanger the cyclist Correct answer.
  2. Cyclists are required to move into the ditch
  3. The lorry's mirrors make side clearance irrelevant
  4. A horn blast replaces physical clearance

Explanation

A large vehicle can unsettle a cyclist through air turbulence and limited space. The driver should wait for a safe passing opportunity with generous clearance.

Question 42Priority Signs

A pedestrian is hidden by a parked van near a crossing. What clue should a truck driver treat as important?

  1. The parked van blocks sight lines, so someone may step out late Correct answer.
  2. The crossing is safe because the pedestrian is not visible
  3. The truck's height removes all blind areas
  4. Only vehicles matter in image questions

Explanation

Obstructed sight lines are a classic developing hazard. A category C driver should reduce speed early because the lorry cannot stop instantly if a pedestrian appears.

Question 43Priority Signs

What is the safest way to handle a tailgater behind your lorry on a slippery road?

  1. Maintain a safe speed, increase space ahead, and brake early and smoothly Correct answer.
  2. Brake hard to teach them to keep distance
  3. Speed up beyond conditions to escape them
  4. Focus only on the tailgater and ignore the road ahead

Explanation

You cannot control the following driver's behaviour, but you can create more time ahead and avoid abrupt braking. Smooth early deceleration reduces rear-end risk on low grip.

Question 44Priority Signs

What is the correct response when an emergency vehicle approaches with blue lights and siren?

  1. Create space and give free passage safely and predictably Correct answer.
  2. Stop immediately wherever you are, including blocking a junction
  3. Race ahead of it to clear the lane
  4. Ignore it unless it is directly behind your lorry

Explanation

A lorry driver must help the emergency vehicle pass without creating a new obstruction. The best action depends on the road, but it must be calm, visible, and predictable.

Question 45Priority Signs

Why should a driver keep both hands available for steering a heavy lorry in complex traffic?

  1. Large vehicles require precise control and quick smooth corrections when hazards develop Correct answer.
  2. One hand is enough because power steering does everything
  3. Hands are needed only above 80 km/h
  4. Steering matters less than changing radio channels

Explanation

Complex traffic can require smooth steering while braking and observing mirrors. Distraction or poor hand position reduces control of a vehicle with large mass and dimensions.

Question 46Priority Signs

A traffic image shows a priority road sign for your route, but you are turning right across a cycle path with a cyclist approaching from behind on your right. What controls your action?

  1. Your priority-road status does not remove the need to check the blind spot and avoid cutting off the cyclist Correct answer.
  2. Priority road means every cyclist must yield to the truck
  3. The cyclist is irrelevant once your signal is on
  4. A heavy vehicle may turn first because stopping is difficult

Explanation

Priority signs help with vehicle conflicts at intersections, but they do not make a blind right turn safe. A truck driver must scan for cyclists and pedestrians and yield or wait when the turn would endanger them.

Question 47Priority Signs

A truck driver sees a green traffic light, but traffic beyond the junction is stopped. What should the driver do?

  1. Wait before the junction unless there is enough space for the whole lorry to clear it Correct answer.
  2. Enter because green always allows blocking the junction
  3. Stop with the trailer or rear body across the pedestrian crossing
  4. Move forward until the cab clears and ignore the rear overhang

Explanation

A lorry must not enter a junction unless it can clear the conflict area safely. Blocking a junction or crossing can trap vulnerable users and cross traffic.

Question 48Priority Signs

A lorry approaches a bus stop where the bus has its indicator on and passengers are close to the kerb. What is the safest combined judgement?

  1. Prepare to give way where required and watch for passengers stepping into the road around the bus Correct answer.
  2. Pass close before the bus moves
  3. Focus only on the bus mirror and ignore pedestrians
  4. Accelerate because the bus is slower

Explanation

Bus stops combine priority interaction and vulnerable-road-user risk. Passengers may step out unexpectedly, and a heavy vehicle needs enough room to slow or stop smoothly.

Question 49Hazards Fitness

What is the correct approach to icy roads in a category C vehicle?

  1. Reduce speed early, increase distance, and make smooth steering and braking inputs Correct answer.
  2. Use cruise control to hold the posted speed exactly
  3. Brake hard at the last moment to test grip
  4. Follow another vehicle closely to copy its tracks

Explanation

Ice sharply reduces tyre grip and makes a heavy vehicle harder to slow or steer. Early speed reduction and smooth inputs are essential risk controls.

Question 50Hazards Fitness

What is the safest rule for alcohol or drugs before driving a lorry?

  1. Do not drive if impaired or over the legal limit; wait until fully fit and legal Correct answer.
  2. Drive slowly if the route is familiar
  3. Use coffee to cancel impairment
  4. Drive only when the load is light

Explanation

Alcohol and drugs reduce judgement, coordination, and reaction time. In a category C vehicle, impairment creates severe risk because of the vehicle's size and mass.