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Germany Category C theory foundations study materials
Germany Category C theory foundations study resources

Germany Category C theory foundations practice questions

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Question 1Priority Signs

What does a red X over a lane mean?

  1. The lane must not be used Correct answer.
  2. Drive at 30 km/h until a pedestrian steps onto the road
  3. Use hazard lights instead of normal indicators
  4. Maintain urban speed because deliveries are work traffic

Explanation

A truck should leave a closed lane early and smoothly. This is a Class C safety issue because truck mass and size reduce the margin for error.

Question 2Priority Signs

What must a right-turning truck do for a straight-ahead cyclist?

  1. Yield and avoid endangering the cyclist Correct answer.
  2. Turn if the indicator was on before the cyclist arrived
  3. Move closer to the kerb to block cyclists from passing
  4. Sound the horn once and begin turning slowly

Explanation

Cyclists can be hidden in the right-side blind spot. This is a Class C safety issue because truck mass and size reduce the margin for error.

Question 3Priority Signs

What if traffic beyond an intersection is blocked?

  1. Wait before entering until there is room beyond it Correct answer.
  2. Enter on green even if the truck blocks cross traffic
  3. Stop diagonally in the junction to reserve space
  4. Use hazard lights while waiting in the intersection

Explanation

A long truck must not block the junction. This is a Class C safety issue because truck mass and size reduce the margin for error.

Question 4Priority Signs

How should you treat a bus signalling from a marked stop?

  1. Let it pull out when this is safe Correct answer.
  2. Pass immediately before the bus moves
  3. Block the bus because trucks are harder to stop
  4. Use the right shoulder to pass the bus

Explanation

Drivers should facilitate buses leaving marked stops. This is a Class C safety issue because truck mass and size reduce the margin for error.

Question 5Priority Signs

What must you avoid at a level crossing in a queue?

  1. Entering unless you can clear the crossing completely Correct answer.
  2. Enter if no train is currently visible
  3. Stop on the tracks only when barriers are open
  4. Follow the vehicle ahead closely so the queue keeps moving

Explanation

A truck trapped on tracks creates extreme danger. This is a Class C safety issue because truck mass and size reduce the margin for error.

Question 6Speed Distance

What is the fog visibility rule below 50 m?

  1. Do not exceed 50 km/h, and go slower if needed Correct answer.
  2. 80 km/h for trucks with winter tyres
  3. The posted limit because fog does not change it
  4. Walking speed until visibility returns to 100 m

Explanation

StVO section 3 sets this maximum for fog, snow, or rain visibility below 50 m.

Question 7Speed Distance

What Autobahn following distance applies to trucks over 3.5 t above 50 km/h?

  1. At least 50 m Correct answer.
  2. 25 m
  3. Two vehicle lengths at any speed
  4. The same gap as urban car traffic

Explanation

StVO section 4 requires this distance. This is a Class C safety issue because truck mass and size reduce the margin for error.

Question 8Speed Distance

What is the visible-distance speed principle?

  1. Drive only so fast that you can stop within the visible distance Correct answer.
  2. Follow the posted limit even if the truck cannot stop in sight
  3. Match the speed of the vehicle ahead if its lights are visible
  4. Use cruise control whenever the road is dry

Explanation

This is central to StVO section 3. This is a Class C safety issue because truck mass and size reduce the margin for error.

Question 9Speed Distance

What should you do when congestion appears suddenly?

  1. Brake early and warn following traffic when appropriate Correct answer.
  2. Maintain speed until the truck ahead brakes sharply
  3. Move onto the hard shoulder without mirror checks
  4. Stop across two lanes to protect the queue

Explanation

Progressive braking helps prevent rear-end collisions. This is a Class C safety issue because truck mass and size reduce the margin for error.

Question 10Heavy Vehicle

Which tyre defect should stop departure?

  1. Visible cord or serious tyre damage Correct answer.
  2. Dust on the sidewall after a dry loading yard
  3. A different brand on the spare wheel
  4. A missing decorative valve-cap cover

Explanation

Such damage can fail under truck loads. This is a Class C safety issue because truck mass and size reduce the margin for error.

Question 11Heavy Vehicle

Why inspect wheel nuts and rims?

  1. Loose or damaged wheels can separate or fail Correct answer.
  2. It proves the truck has an emissions sticker
  3. It determines whether the tachograph records driving
  4. It is needed only before international journeys

Explanation

Movement marks or cracks are serious warning signs. This is a Class C safety issue because truck mass and size reduce the margin for error.

Question 12Heavy Vehicle

What if a low air-pressure warning appears?

  1. Stop safely and do not continue until brakes are safe Correct answer.
  2. Drive slowly to keep pressure from falling further
  3. Release the parking brake repeatedly to rebuild air
  4. Disconnect the warning buzzer and report it later

Explanation

Low air pressure may compromise brake operation. This is a Class C safety issue because truck mass and size reduce the margin for error.

Question 13Heavy Vehicle

Why manage air-system moisture?

  1. Water can freeze or impair brake components Correct answer.
  2. Moisture increases braking force on descents
  3. Water in the tank proves the compressor works
  4. Moisture affects only the horn circuit

Explanation

Compressed-air systems can be affected by moisture. This is a Class C safety issue because truck mass and size reduce the margin for error.

Question 14Heavy Vehicle

What if ABS or EBS warnings remain active?

  1. Treat them as brake-control defects and follow vehicle instructions Correct answer.
  2. Continue normally because service brakes always work
  3. Cover the warning lamp if the truck brakes in the yard
  4. Drive only below 50 km/h until the next inspection

Explanation

These systems affect braking stability and control. This is a Class C safety issue because truck mass and size reduce the margin for error.

Question 15Heavy Vehicle

Why is underrun protection important?

  1. It reduces injury risk for vulnerable users and smaller vehicles Correct answer.
  2. They are mainly aerodynamic side panels
  3. They replace the need for side marker lights
  4. They allow use of narrower roadworks lanes

Explanation

Damaged guards can worsen collisions. This is a Class C safety issue because truck mass and size reduce the margin for error.

Question 16Heavy Vehicle

What should you do before a long descent?

  1. Select a suitable lower gear and auxiliary braking early Correct answer.
  2. Coast in neutral until reaching the posted limit
  3. Use the parking brake lightly to save the service brakes
  4. Wait for brake fade before downshifting

Explanation

Control speed before service brakes overheat. This is a Class C safety issue because truck mass and size reduce the margin for error.

Question 17Heavy Vehicle

What is a retarder or engine brake for?

  1. Helping control speed without relying only on service brakes Correct answer.
  2. Replacing correct load distribution
  3. Permitting a higher legal rural speed
  4. Securing the truck automatically when parked

Explanation

Auxiliary braking reduces service-brake heat. This is a Class C safety issue because truck mass and size reduce the margin for error.

Question 18Heavy Vehicle

Why avoid abrupt steering at speed?

  1. High mass and load height can cause sway or rollover Correct answer.
  2. The steering disconnects above 80 km/h
  3. Sudden steering releases the parking brake
  4. The tachograph treats it as rest time

Explanation

Lateral forces are dangerous in tall heavy vehicles. This is a Class C safety issue because truck mass and size reduce the margin for error.

Question 19Heavy Vehicle

Why avoid neutral coasting downhill?

  1. It removes engine or auxiliary braking and reduces control Correct answer.
  2. It makes the compressor produce too much air
  3. It stops the tachograph recording distance
  4. It increases steering response on wet roads

Explanation

Speed can build quickly without drivetrain braking. This is a Class C safety issue because truck mass and size reduce the margin for error.

Question 20Heavy Vehicle

Why check load securing after harsh braking?

  1. Straps may loosen and freight may shift Correct answer.
  2. Emergency braking permanently tightens all straps
  3. The load becomes legally lighter after a near miss
  4. The tachograph confirms the freight is secure

Explanation

Emergency forces can weaken the securing system. This is a Class C safety issue because truck mass and size reduce the margin for error.

Question 21Heavy Vehicle

Why are right turns high risk in trucks?

  1. Blind spots and off-tracking can trap cyclists or pedestrians Correct answer.
  2. The right indicator gives trucks priority over cyclists
  3. The rear wheels follow exactly the front wheels
  4. Pedestrians are not allowed near delivery turns

Explanation

The rear wheels cut inside the front path. This is a Class C safety issue because truck mass and size reduce the margin for error.

Question 22Heavy Vehicle

Before reversing at a loading bay, what is essential?

  1. Check the area using mirrors, cameras, and a guide if needed Correct answer.
  2. Reverse immediately because loading bays are private
  3. Rely only on the audible reversing alarm
  4. Steer from outside the cab with the door open

Explanation

Reversing has large blind areas. This is a Class C safety issue because truck mass and size reduce the margin for error.

Question 23Heavy Vehicle

What if you lose sight of a reversing guide?

  1. Stop until communication is restored Correct answer.
  2. Continue slowly because the guide will move
  3. Sound the horn twice and keep reversing
  4. Switch to the camera and ignore the guide

Explanation

Continuing without contact is unsafe. This is a Class C safety issue because truck mass and size reduce the margin for error.

Question 24Heavy Vehicle

What if a cyclist filters up on your right before a right turn?

  1. Wait until the cyclist clears Correct answer.
  2. Turn because your indicator was on first
  3. Move closer to the kerb to block more cyclists
  4. Open the passenger door to warn the cyclist

Explanation

Signalling does not remove the duty to avoid danger. This is a Class C safety issue because truck mass and size reduce the margin for error.

Question 25Heavy Vehicle

Why is high cab seating not enough?

  1. It can hide close pedestrians and cyclists around the cab Correct answer.
  2. It removes the need for front and side mirrors
  3. It makes the truck visible from every blind spot
  4. It lets the driver judge rear overhang unaided

Explanation

A high view still leaves close-in blind areas. This is a Class C safety issue because truck mass and size reduce the margin for error.

Question 26Heavy Vehicle

What is safest near children at the roadside?

  1. Reduce speed and be ready to brake Correct answer.
  2. Maintain the speed limit to avoid confusing them
  3. Move closer to the kerb to show your path
  4. Use the horn until the children move away

Explanation

StVO requires special care toward children. This is a Class C safety issue because truck mass and size reduce the margin for error.

Question 27Heavy Vehicle

How should you pass an unsteady cyclist near a narrowing?

  1. Wait until sufficient side clearance is available Correct answer.
  2. Squeeze past before the narrowing
  3. Use the air horn so the cyclist rides straight
  4. Pass partly on the pavement to create room

Explanation

A truck should not squeeze past vulnerable users. This is a Class C safety issue because truck mass and size reduce the margin for error.

Question 28Heavy Vehicle

Why check side clearance beside parked vehicles?

  1. Doors may open and pedestrians may step out Correct answer.
  2. Parked vehicles legally lose protection from trucks
  3. Truck mirrors are designed to bend around parked cars
  4. Side clearance matters only when loaded

Explanation

Truck width and mirrors need extra margin. This is a Class C safety issue because truck mass and size reduce the margin for error.

Question 29Vehicle Load

What should you do with a frayed load strap?

  1. Replace it or use sound rated equipment Correct answer.
  2. Axle loads matter only for buses
  3. Axle loads are checked only at borders
  4. The tachograph calculates axle loads automatically

Explanation

Damaged securing gear may not hold its rated force. This is a Class C safety issue because truck mass and size reduce the margin for error.

Question 30Vehicle Load

What if a curtain side bulges outward?

  1. Stop and correct the load or curtain before driving Correct answer.
  2. Drive with hazard lights until the cargo settles
  3. Use only the right lane because the bulge is on the side
  4. Continue if the delivery point is less than 10 km away

Explanation

A bulge can indicate unsafe cargo or excessive width. This is a Class C safety issue because truck mass and size reduce the margin for error.

Question 31Vehicle Load

Why is truck route planning essential?

  1. Height, width, weight, turning, and environmental limits can block routes Correct answer.
  2. Truck drivers may ignore route signs with a delivery note
  3. Cars have stricter bridge limits than trucks
  4. A route is valid whenever navigation gives the shortest time

Explanation

A car route may be unsuitable or illegal for a truck. This is a Class C safety issue because truck mass and size reduce the margin for error.

Question 32Environment Emergencies

What is safest during aquaplaning?

  1. Ease off, hold steering steady, and avoid abrupt inputs Correct answer.
  2. Brake hard until tyres cut through the water
  3. Accelerate to transfer weight rearward
  4. Apply the parking brake briefly

Explanation

Smooth control helps tyres regain contact. This is a Class C safety issue because truck mass and size reduce the margin for error.

Question 33Environment Emergencies

Why remove roof snow or ice where safe equipment is available?

  1. It can fall onto traffic or the windscreen Correct answer.
  2. It improves braking by increasing roof mass
  3. It matters only before motorway trips
  4. It applies only to refrigerated vehicles

Explanation

A high truck roof can shed dangerous ice sheets. This is a Class C safety issue because truck mass and size reduce the margin for error.

Question 34Environment Emergencies

Why are crosswinds risky for high-sided trucks?

  1. They can push the vehicle sideways or destabilise it Correct answer.
  2. They increase tyre grip by pressing sideways
  3. They affect motorcycles but not heavy vehicles
  4. They reduce the legal following distance on bridges

Explanation

Large side area catches wind. This is a Class C safety issue because truck mass and size reduce the margin for error.

Question 35Environment Emergencies

After an Autobahn breakdown, what should you do first?

  1. Warn and secure the scene, then move people to safety Correct answer.
  2. Stay seated in the cab without warning traffic
  3. Stand behind the truck and wave traffic around
  4. Begin repairs in the live lane before warning others

Explanation

Life protection comes before repairs. This is a Class C safety issue because truck mass and size reduce the margin for error.

Question 36Environment Emergencies

What if cargo spills onto the carriageway?

  1. Warn traffic, secure the scene, and notify help Correct answer.
  2. Continue to destination and report the shortage
  3. Move the cargo to the centre line for visibility
  4. Ask following drivers to clear it while you wait

Explanation

Lost cargo is an immediate road hazard. This is a Class C safety issue because truck mass and size reduce the margin for error.

Question 37Environment Emergencies

Why increase following distance in rain?

  1. Wet roads lengthen stopping distance and reduce visibility Correct answer.
  2. Rain cools brakes and allows shorter gaps
  3. The 50 m motorway rule is suspended in rain
  4. Water makes loaded trucks stop more quickly

Explanation

Heavy vehicles need extra margin on wet roads. This is a Class C safety issue because truck mass and size reduce the margin for error.

Question 38Environment Emergencies

How should you react to glare?

  1. Reduce speed and increase distance Correct answer.
  2. Maintain speed because the road layout is unchanged
  3. Use main beam headlights at oncoming traffic
  4. Drive closer to the centre line for a better view

Explanation

Glare reduces hazard detection. This is a Class C safety issue because truck mass and size reduce the margin for error.

Question 39Environment Emergencies

What should you do if the truck starts to skid on ice?

  1. Ease off and avoid abrupt steering or braking Correct answer.
  2. Accelerate hard to pull the vehicle straight
  3. Apply the parking brake to lock rear wheels
  4. Steer sharply while braking

Explanation

Smooth inputs are essential on ice. This is a Class C safety issue because truck mass and size reduce the margin for error.

Question 40Hazards Fitness

Why is fatigue serious in truck driving?

  1. Attention failures in heavy vehicles can have severe consequences Correct answer.
  2. Fatigue affects only motorcycle riders
  3. Coffee removes the safety risk completely
  4. The tachograph prevents a tired driver from reacting late

Explanation

Fatigue slows reaction and judgement. This is a Class C safety issue because truck mass and size reduce the margin for error.

Question 41Hazards Fitness

What if medication makes you drowsy?

  1. Do not drive until fit and the medication is compatible with driving Correct answer.
  2. Drive only on familiar routes
  3. Use coffee to cancel the warning
  4. Drive empty but refuse loaded trips

Explanation

A driver must be fit before operating a heavy vehicle. This is a Class C safety issue because truck mass and size reduce the margin for error.

Question 42Hazards Fitness

What about cannabis or impairing drugs?

  1. Do not drive while impaired or above legal limits Correct answer.
  2. Cannabis is safe if used the previous evening
  3. Drug impairment matters only after a collision
  4. Category C drivers are tested only for alcohol, not drugs

Explanation

Drug impairment has safety and licensing consequences. This is a Class C safety issue because truck mass and size reduce the margin for error.

Question 43Priority Signs

What does the red octagonal Stop sign require from a C1 driver?

  1. Stop and give priority to traffic on the other road Correct answer.
  2. Slow down only if another vehicle is visible
  3. Stop only when carrying a load
  4. Continue if your vehicle is heavier than cross traffic

Explanation

The Stop sign requires a full stop and giving priority. A C1 vehicle's size never creates priority; the driver must stop where visibility allows safe entry if no stop line is present.

Question 44Priority Signs

A downward-pointing triangular sign means what?

  1. Priority road begins
  2. Give way to traffic with priority Correct answer.
  3. No goods vehicles
  4. End of all restrictions

Explanation

The downward triangle is the German Give way sign. A C1 driver must approach slowly enough to avoid endangering or substantially hindering traffic that has priority.

Question 45Priority Signs

A yellow diamond priority-road sign is followed by a supplementary diagram showing the priority road bends left. You want to go straight. What must you expect?

  1. You remain on the priority road automatically
  2. Traffic following the marked priority-road bend can have priority over you Correct answer.
  3. The sign applies only to vehicles under 3.5 t
  4. All vehicles must stop because the priority road bends

Explanation

A supplementary plate can show the actual course of the priority road. If you leave that course by going straight, you must apply the signed priority situation, signal correctly where required, and watch for vehicles following the priority path.

Question 46Priority Signs

At an unmarked intersection with no signs or signals, which rule normally applies?

  1. The heavier vehicle has priority
  2. The faster road has priority
  3. Right-before-left applies Correct answer.
  4. Goods vehicles must always stop

Explanation

Where no sign, signal, or special rule changes priority, the general rule is right-before-left. A C1 vehicle must be ready to yield to traffic coming from the right, even if the other vehicle is smaller.

Question 47Priority Signs

You are turning right in a C1 vehicle and a cyclist is continuing straight on a cycle lane beside you. What is the safest legal response?

  1. Turn first because your vehicle is larger
  2. Signal and turn quickly before the cyclist reaches you
  3. Let the cyclist continue and turn only when no danger is created Correct answer.
  4. Move left first so the cyclist cannot pass

Explanation

StVO turning rules require turning drivers to let cyclists travelling in the same direction on or beside the road pass. In a C1 vehicle this also demands special blind-spot checks and a slow, controlled turn.

Question 48Priority Signs

A police officer gives a clear hand signal that conflicts with a traffic light. What should a C1 driver follow?

  1. The police officer's signal Correct answer.
  2. The traffic light only
  3. The road sign only
  4. The rule that goods vehicles go last

Explanation

Police directions take precedence over traffic signals and signs. A C1 driver should obey the officer, but still move carefully because of the vehicle's size and stopping distance.

Question 49Priority Signs

What does a round red-bordered sign showing a truck usually prohibit?

  1. All motor vehicles
  2. Goods vehicles of the indicated type or above the indicated mass if a plate is used Correct answer.
  3. Only buses
  4. Only vehicles carrying dangerous goods

Explanation

A truck prohibition sign restricts goods vehicles, and supplementary plates can define mass thresholds or exceptions. A C1 driver must read both the symbol and any plate before entering.

Question 50Priority Signs

What does a sign showing a vehicle height limit of 3.8 m mean for a 3.95 m high C1 vehicle?

  1. You may proceed slowly if no bridge is visible
  2. You may proceed if the vehicle is empty
  3. You must not enter because the vehicle exceeds the posted height Correct answer.
  4. You may proceed only in the middle of the road

Explanation

A posted height restriction is a binding maximum. Load state does not make a 3.95 m vehicle shorter for the sign, and ignoring the limit can cause bridge strikes and serious traffic danger.