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Czech Category C heavy-goods theory foundations study materials
Czech Category C heavy-goods theory foundations study resources

Czech Category C heavy-goods theory foundations practice questions

One question at a time. Build your Czech Category C heavy-goods theory foundations understanding.

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Question 1Truck Technology

What type of vehicle is the Czech Category C licence mainly for?

  1. Motorcycles over 125 cm3
  2. Motor vehicles over 3,500 kg that are not Category D1 or D Correct answer.
  3. Passenger cars up to 3,500 kg only
  4. Buses built to carry more than eight passengers

Explanation

Category C is the truck and larger-vehicle category for motor vehicles over 3,500 kg, excluding the bus categories D1 and D. It is not the standard passenger-car category and it is not a motorcycle or bus passenger-carrying category.

Question 2Truck Technology

With a Category C vehicle, what is the maximum permitted mass of a trailer that may be attached without needing Category C+E?

  1. 750 kg Correct answer.
  2. 1,500 kg
  3. 3,500 kg
  4. Any trailer if it is empty

Explanation

Category C covers the truck together with a trailer up to 750 kg maximum permitted mass. A heavier trailer moves the combination into the C+E category, assuming the driver and vehicle meet the other legal requirements.

Question 3Truck Technology

On a long downhill grade, what driving technique protects a truck's service brakes?

  1. Select a suitable lower gear and use engine braking or retarder support where fitted Correct answer.
  2. Coast in neutral to cool the engine
  3. Use continuous light service-brake pressure all the way down
  4. Turn off the engine to reduce fuel use

Explanation

A lower gear, engine braking, and a retarder where fitted help control speed without overheating the service brakes. Continuous braking on a long descent can lead to brake fade and loss of control.

Question 4Truck Technology

Why should a truck with a high load slow well before a curve or exit ramp?

  1. A high center of gravity increases rollover risk Correct answer.
  2. High loads make the steering wheel smaller
  3. A truck can safely corner faster when fully loaded
  4. Rollover risk exists only when the road is icy

Explanation

A high or poorly distributed load raises the center of gravity and increases rollover risk during curves, sudden steering, or evasive maneuvers. The safest control is to reduce speed before the curve, not while already turning sharply.

Question 5Truck Technology

What should a Category C driver remember about blind spots?

  1. Mirrors reduce blind spots but do not eliminate them Correct answer.
  2. Large mirrors eliminate all blind spots
  3. Blind spots matter only when reversing
  4. Cyclists cannot be hidden next to a truck

Explanation

Truck mirrors and cameras help, but blind spots can still exist beside, behind, and in front of the vehicle. The driver must check carefully before turning, lane changing, reversing, and moving off.

Question 6Truck Technology

What is off-tracking in a long truck or truck-trailer combination?

  1. The rear wheels follow a tighter path than the front wheels in a turn Correct answer.
  2. The vehicle automatically keeps itself centered in the lane
  3. The front wheels follow behind the rear wheels
  4. The tachograph loses satellite signal

Explanation

Off-tracking means the rear of a long vehicle cuts inside the path of the front wheels during a turn. The driver must allow enough space so the rear wheels, trailer, and overhang do not hit curbs, cyclists, pedestrians, signs, or adjacent vehicles.

Question 7Truck Technology

Why can air brakes increase total stopping distance compared with a hydraulic-brake passenger car?

  1. Air brakes may have a short application delay before full braking force builds Correct answer.
  2. Air brakes make the truck lighter
  3. Air brakes eliminate reaction time
  4. Air brakes work only below 30 km/h

Explanation

Many heavy vehicles use air brakes, which can have brake lag before the brakes fully apply. The driver must account for perception time, reaction time, brake application delay, and the greater braking distance of a heavy vehicle.

Question 8Truck Technology

Why is load distribution important before starting a trip?

  1. It affects steering, braking, axle load, and rollover risk Correct answer.
  2. It matters only for fuel accounting
  3. It matters only if the truck has a trailer
  4. It is irrelevant if the load is tied down

Explanation

A load that is too high, too far back, too far to one side, or concentrated over one axle can change how the truck steers, stops, and corners. Proper securing is essential, but it does not fix poor weight distribution.

Question 9Truck Technology

If a front tire suddenly fails on a truck at speed, what should the driver do first?

  1. Hold the steering wheel firmly, keep the vehicle straight, and slow down smoothly Correct answer.
  2. Brake hard immediately
  3. Turn sharply onto the shoulder
  4. Shift into reverse

Explanation

A front tire failure can pull the truck toward the failed side, so the first priority is steering control. Smooth deceleration and a controlled move to a safe stopping place are safer than panic braking or abrupt steering.

Question 10Truck Technology

Why can a partly filled liquid tank be harder to control than a full rigid load?

  1. Liquid surge can shift weight and affect braking or cornering Correct answer.
  2. Liquid cargo makes the brakes unnecessary
  3. A partly filled tank has no center of gravity
  4. Liquid surge improves steering grip

Explanation

Liquid cargo can surge forward, backward, or sideways as the vehicle accelerates, brakes, or turns. That moving weight can lengthen stopping distance, destabilize the truck, and increase rollover risk.

Question 11Truck Technology

Before starting a trip, which check is especially important for a Category C truck?

  1. Lights, tires, mirrors, brakes, load security, and visible plates/markings Correct answer.
  2. Only the radio volume
  3. Only whether the driver likes the route
  4. Only the color of the trailer

Explanation

A truck must be roadworthy before it is used in traffic. Lights, tires, mirrors, brakes, steering, load security, registration plates, and required markings all affect safety and legality.

Question 12Truck Technology

What is the purpose of securing cargo with straps, chains, blocking, or other suitable devices?

  1. To prevent movement, falling, instability, and danger to road users Correct answer.
  2. Only to make the cargo look tidy
  3. Only to satisfy the customer
  4. To allow the driver to brake later

Explanation

Cargo restraint keeps the load from shifting, falling, or changing the vehicle's stability. Proper securing also protects other road users from falling objects and helps keep axle loads and vehicle control within safe limits.

Question 13Truck Technology

If an air-pressure warning activates in a truck with air brakes, what should the driver do?

  1. Treat it as serious, stop safely, and do not continue until the brake system is safe Correct answer.
  2. Ignore it if the truck still moves
  3. Pump the brakes rapidly to build pressure while driving
  4. Disconnect the warning buzzer

Explanation

Low air pressure can mean the service brakes may not work properly and spring brakes may apply. The driver should stop safely and have the brake system corrected before continuing.

Question 14Truck Technology

Why are tires on a Category C truck a major safety item?

  1. They carry high loads and provide the grip needed for steering and braking Correct answer.
  2. They are inspected only for appearance
  3. They make speed limits unnecessary
  4. They eliminate the need for load securing

Explanation

Truck tires carry heavy loads and must maintain grip, pressure, tread, and structural condition. A tire failure on a heavy vehicle can cause loss of control, cargo damage, or danger to nearby traffic.

Question 15Truck Technology

A load projects beyond the normal outline of the truck. What must the driver consider before driving?

  1. Whether the projection is lawful, marked as required, and does not endanger or hide required equipment Correct answer.
  2. Only whether the load is profitable
  3. Only whether the driver can still close the cab door
  4. Nothing if the projection is behind the driver

Explanation

Projecting loads can affect width, length, visibility, turning clearance, and the ability of other road users to judge the vehicle. The driver must ensure the projection is lawful, properly marked where required, and securely restrained.

Question 16Truck Technology

What is a key duty when a truck has mandatory mirrors or indirect-vision devices?

  1. Keep them adjusted, clean, and usable before and during the trip Correct answer.
  2. Fold them in during all city driving
  3. Use them only when reversing
  4. Replace mirror checks with a louder horn

Explanation

Mirrors and indirect-vision systems are essential for lane changes, turns, reversing, and detecting vulnerable road users near the truck. They must be adjusted and kept usable, but the driver must still account for blind spots.

Question 17Truck Technology

A defect affects the truck's steering, braking, lighting, or load security. What is the correct decision?

  1. Do not drive in traffic until the vehicle is safe and roadworthy Correct answer.
  2. Drive only at night so the defect is less visible
  3. Drive faster to reach repair sooner
  4. Continue if the delivery is urgent

Explanation

A vehicle used on the road must be technically fit and safe. Defects in steering, brakes, lights, tires, or load security can create immediate danger and cannot be excused by delivery pressure.

Question 18Truck Technology

What does Category C+E add to Category C?

  1. Permission for a Category C vehicle combination with a trailer over 750 kg, subject to the category rules Correct answer.
  2. Permission to drive motorcycles
  3. Permission to carry more than eight passengers in a bus
  4. Permission to ignore truck route restrictions

Explanation

Category C alone allows a trailer up to 750 kg maximum permitted mass. A heavier trailer generally requires the appropriate E category, such as C+E for a Category C towing vehicle.

Question 19Truck Technology

If a truck is subject to tachograph rules, what is a core driver responsibility?

  1. Use the tachograph and driver card correctly and honestly Correct answer.
  2. Use another driver's card to save time
  3. Switch the tachograph off whenever running late
  4. Record only driving done outside cities

Explanation

Tachograph records are used to document driving, breaks, rest, and related activity for vehicles covered by those rules. Misusing a driver card or falsifying records undermines road safety and can lead to serious enforcement consequences.

Question 20Czech Framework

In normal conditions, what is the general maximum speed for a Category C truck inside a built-up area unless signs set a different limit?

  1. 30 km/h
  2. 50 km/h Correct answer.
  3. 80 km/h
  4. 90 km/h

Explanation

The general built-up-area limit is 50 km/h unless a sign or special road rule sets another limit. A Category C driver must still choose a lower speed when traffic, load, visibility, road surface, or vehicle condition requires it.

Question 21Czech Framework

What general maximum speed applies to a Category C truck over 3,500 kg on a Czech motorway outside a built-up area unless a lower sign applies?

  1. 80 km/h Correct answer.
  2. 90 km/h
  3. 110 km/h
  4. 130 km/h

Explanation

A truck over 3,500 kg is generally limited to 80 km/h on Czech roads, including motorways, unless a lower limit or vehicle-specific restriction applies. The higher passenger-car motorway limits do not apply to Category C trucks.

Question 22Czech Framework

A posted speed limit sign shows 60 km/h on a road where a Category C truck could otherwise travel up to 80 km/h. What speed limit must the truck driver obey?

  1. 60 km/h Correct answer.
  2. 70 km/h
  3. 80 km/h
  4. 90 km/h

Explanation

A posted lower speed limit overrides the general vehicle-category limit. The driver may also need to drive below 60 km/h if the truck's load, braking distance, visibility, or road conditions make 60 unsafe.

Question 23Czech Framework

What must a Category C driver do at a STOP sign?

  1. Slow to walking speed and continue if no vehicle is visible
  2. Stop only when another vehicle is approaching
  3. Come to a complete stop at the required place and then yield as required Correct answer.
  4. Flash the headlights and proceed carefully

Explanation

A STOP sign requires a complete stop at the stop line or, if there is no line, at a place with a sufficient view. After stopping, the truck driver must still yield according to the sign and traffic situation.

Question 24Czech Framework

Which action is prohibited while driving a Category C truck?

  1. Listening to normal traffic radio
  2. Holding a phone or similar device in the hand Correct answer.
  3. Using a properly mounted navigation device
  4. Wearing required corrective glasses

Explanation

A driver must not hold a phone or similar communication or recording device while driving. Hands-free or mounted equipment must still be used in a way that does not distract from safe control of the truck.

Question 25Czech Framework

At a railway crossing, the red warning lights are flashing. What must a Category C driver do?

  1. Stop before the crossing and wait until crossing is permitted Correct answer.
  2. Drive across quickly if the truck is heavy
  3. Proceed if no train is visible
  4. Sound the horn and continue

Explanation

Flashing red lights at a railway crossing prohibit entry, and the driver must stop before the crossing. A truck must never enter unless it can cross completely and safely without stopping on the tracks.

Question 26Czech Framework

When joining a motorway from an acceleration lane, what must a Category C driver do?

  1. Give way to vehicles already on the motorway and merge only when safe Correct answer.
  2. Force traffic in the right lane to brake because the acceleration lane is ending
  3. Stop at the end of the acceleration lane in all cases
  4. Use the hazard lights to claim priority

Explanation

Traffic already on the motorway has priority over a vehicle joining from an acceleration lane. A truck driver should build suitable speed within the truck's limits, signal, and merge only when the gap is safe.

Question 27Czech Framework

A Category C truck breaks down on a motorway. What is the correct first response?

  1. Stop as safely as possible, warn traffic, and move people to a safe place Correct answer.
  2. Remain in the traffic lane to inspect the engine
  3. Walk behind the truck without warning devices
  4. Reverse along the motorway to the previous exit

Explanation

The driver should get the vehicle out of traffic if possible, use warning lights and the warning triangle as required, and protect passengers or helpers from moving traffic. A motorway breakdown is a high-risk situation because closing speeds are high.

Question 28Czech Framework

What does a priority road sign tell a Category C driver?

  1. The driver is on a priority road until the priority ends or another control changes it Correct answer.
  2. The truck may ignore traffic lights
  3. The truck may exceed speed limits
  4. The truck has priority over pedestrians on crossings

Explanation

A priority road sign gives priority at intersections according to the signed route until the priority ends or a higher control applies. It does not cancel speed limits, traffic lights, pedestrian duties, or police directions.

Question 29Czech Framework

Why must a Category C driver understand the difference between a motorway sign and a road-for-motor-vehicles sign?

  1. Different road types can have different rules, restrictions, and speed limits Correct answer.
  2. The signs are decorative only
  3. The signs apply only to passenger cars
  4. A truck may ignore both signs if loaded

Explanation

Road classification signs tell the driver which special road rules apply, including entry restrictions, stopping rules, and speed limits. Truck drivers must combine those rules with the vehicle's Category C limits and any posted restrictions.

Question 30Czech Framework

Who issues the official wording of Czech driving theory test questions?

  1. The Ministry of Transport Correct answer.
  2. A private truck manufacturer
  3. The candidate's employer
  4. A fuel station chain

Explanation

The Ministry of Transport issues the official question wording for road-traffic regulations and first aid. eTesty is the official practice portal that uses the Ministry question sets.

Question 31Priority Signs

Outside a built-up area, what extra spacing duty applies to a truck over 3,500 kg when following another vehicle?

  1. It must drive as close as possible to reduce wind resistance
  2. It must keep enough gap so an overtaking vehicle can safely return between vehicles Correct answer.
  3. It may use any gap if the road has a hard shoulder
  4. It must leave exactly 100 meters in every situation

Explanation

Czech rules require heavy vehicles and long combinations outside built-up areas to leave a gap that allows an overtaking vehicle to return safely. This supports safe overtaking on two-way roads and is separate from the driver's normal following-distance duty.

Question 32Priority Signs

Which traffic control has the highest authority at an intersection?

  1. A police officer directing traffic Correct answer.
  2. A traffic light
  3. A priority road sign
  4. The priority-from-the-right rule

Explanation

Directions from a police officer or other authorized traffic controller override signals, signs, markings, and general priority rules. A Category C driver must be especially careful because a heavy vehicle needs more time to start, stop, and clear the intersection.

Question 33Priority Signs

Before changing lanes in a truck, what is the basic legal and safety rule?

  1. Signal only after the truck has entered the new lane
  2. Yield to vehicles already in the target lane and signal the movement Correct answer.
  3. Move first because a larger vehicle has priority
  4. Use the horn instead of the direction indicator

Explanation

The driver must check mirrors and blind spots, signal in time, and give way to vehicles already using the lane being entered. The direction indicator warns others but does not give the truck priority.

Question 34Priority Signs

What must a truck driver do when a pedestrian is already crossing on a marked pedestrian crossing?

  1. Allow the pedestrian to cross safely Correct answer.
  2. Drive around the pedestrian if there is room
  3. Sound the horn and continue at the same speed
  4. Stop only if the pedestrian is on the truck's half of the road

Explanation

Drivers must not endanger pedestrians on a crossing and must allow them to cross safely. A truck's greater width and stopping distance make early speed reduction especially important.

Question 35Priority Signs

An emergency vehicle approaches using blue warning lights and a siren. What should a truck driver do?

  1. Create a clear path and stop safely if necessary Correct answer.
  2. Continue normally unless the emergency vehicle is directly behind
  3. Follow the emergency vehicle through traffic
  4. Stop immediately without checking mirrors

Explanation

Drivers must allow emergency vehicles using warning signals to pass. A truck driver should act predictably, check mirrors, make space, and stop only where it is safe to do so.

Question 36Priority Signs

When turning or changing direction with a truck, when should the driver signal?

  1. Only after the movement is complete
  2. In good time before the movement begins Correct answer.
  3. Only if another vehicle is visible
  4. Only on roads outside built-up areas

Explanation

The direction indicator must be used in good time so other road users can understand the truck's intended movement. A long vehicle may swing wide or track differently, so early and clear signaling is especially important.

Question 37Priority Signs

At a roundabout marked with a Give Way sign, what must a truck driver do before entering?

  1. Yield to vehicles already circulating on the roundabout Correct answer.
  2. Enter first because trucks need more space
  3. Stop every time even when no one is circulating
  4. Yield only to vehicles coming from the right

Explanation

Where the roundabout entry is controlled by a Give Way sign, entering traffic must yield to vehicles already on the roundabout. The driver should also plan the truck's path so the rear wheels and overhang do not endanger cyclists, pedestrians, or adjacent vehicles.

Question 38Priority Signs

When overtaking a cyclist, what should a truck driver plan for?

  1. A very small side gap because the truck is easy to see
  2. A safe lateral clearance, normally at least 1.5 meters where required Correct answer.
  3. Passing only by sounding the horn repeatedly
  4. Forcing the cyclist onto the shoulder

Explanation

Czech rules require a safe lateral distance when overtaking cyclists, with the normal minimum commonly tested as 1.5 meters, subject to the lower-speed exception. A truck creates wind turbulence and has large mirrors, so the driver should leave more room whenever conditions require it.

Question 39Priority Signs

What is the correct approach when a truck enters a tunnel?

  1. Turn off lights to avoid glare
  2. Keep required lights on and maintain a safe distance Correct answer.
  3. Stop in the tunnel to check the load
  4. Change lanes more often to avoid heat buildup

Explanation

In a tunnel, the driver must keep the required lighting on, maintain control, and preserve enough distance for the truck's stopping distance. Stopping is allowed only for traffic, emergency, or other lawful necessity.

Question 40Priority Signs

When reversing a truck where the driver cannot see clearly behind, what is the safest lawful approach?

  1. Reverse quickly before other traffic arrives
  2. Use mirrors only and ignore blind spots
  3. Get help from a competent guide or otherwise ensure the movement is safe Correct answer.
  4. Sound the horn continuously and reverse

Explanation

The driver must not reverse unless the movement can be made safely. With a Category C truck, a guide, camera, or other reliable method may be needed because the rear blind area can be large.

Question 41Priority Signs

What is the hard shoulder of a motorway mainly for?

  1. Regular driving by slow trucks
  2. Emergency stopping and special permitted use, not normal travel Correct answer.
  3. Overtaking on the right
  4. Parking for rest breaks whenever convenient

Explanation

The hard shoulder is not a normal traffic lane. It is used for emergencies, breakdowns, and other specifically permitted situations, so a truck driver must not use it to bypass traffic or rest casually.

Question 42Priority Signs

In a traffic jam on a motorway with several lanes in one direction, where is the emergency corridor formed?

  1. Between the leftmost lane and the lane immediately to its right Correct answer.
  2. Only on the hard shoulder
  3. In the middle of each lane
  4. Behind the last truck in the queue

Explanation

The emergency corridor is created between the leftmost lane and the adjacent lane to its right. Heavy vehicles should form it early because their width and slow maneuvering can otherwise block emergency access.

Question 43Priority Signs

Which vehicle is affected by the Czech holiday driving restriction on motorways and class I roads when the time and exceptions in the law apply?

  1. A bicycle
  2. A passenger car below 3,500 kg
  3. A goods vehicle over 7,500 kg Correct answer.
  4. A moped

Explanation

Czech traffic law includes driving restrictions on motorways and class I roads for heavy goods vehicles, including vehicles over 7,500 kg during specified periods. A Category C driver must know that exceptions exist, but the basic restriction is aimed at heavy goods traffic.

Question 44Priority Signs

What should a truck driver do when a road sign prohibits goods vehicles from entering?

  1. Enter if the truck is empty
  2. Enter only if using hazard lights
  3. Obey the sign unless an additional plate or lawful exception permits entry Correct answer.
  4. Enter if the route is shorter

Explanation

A prohibition sign for goods vehicles applies according to its meaning and any additional plates. Being empty, late, or on a shorter route does not by itself create an exception.

Question 45Priority Signs

In a built-up area, a bus is signaling to leave a bus stop. What should a truck driver approaching from behind do?

  1. Allow the bus to leave the stop safely if this can be done without danger Correct answer.
  2. Accelerate because the truck is on the main lane
  3. Pass the bus at any speed before it moves
  4. Sound the horn so the bus waits

Explanation

Drivers must take account of buses leaving stops in built-up areas and allow them to move out safely when possible. A truck driver should anticipate passengers, pedestrians, and the bus's wider movement from the stop.

Question 46Priority Signs

When a truck turns left across the path of oncoming traffic, what is normally required?

  1. Yield to oncoming vehicles and trams whose path would be crossed Correct answer.
  2. Turn first because the truck needs more time
  3. Yield only to vehicles larger than the truck
  4. Stop only if an oncoming driver flashes headlights

Explanation

A driver turning left normally crosses the path of oncoming traffic and must yield to it. The duty includes trams where the truck's turning path crosses the tram's path.

Question 47Priority Signs

At an uncontrolled intersection with no signs, signals, or police officer, which priority rule applies?

  1. The heaviest vehicle goes first
  2. The vehicle from the right has priority Correct answer.
  3. The vehicle on the wider-looking road always goes first
  4. The fastest vehicle goes first

Explanation

When no higher control applies, the general Czech rule is priority from the right. A truck driver should slow early because stopping a heavy vehicle takes longer if another road user approaches from the right.

Question 48Priority Signs

When is overtaking generally unsafe and unlawful?

  1. When the driver cannot see far enough or cannot return safely without endangering others Correct answer.
  2. Whenever the vehicle ahead is slower
  3. Only when the road is wet
  4. Only in built-up areas

Explanation

A driver may overtake only when it can be done safely, with sufficient visibility and room to return to the lane. A Category C truck needs more distance and time, so marginal overtaking gaps are especially dangerous.

Question 49Priority Signs

On a road where two lanes merge because one lane ends, what should a truck driver do in slow-moving traffic?

  1. Block both lanes early so no one can pass
  2. Use the zipper principle and allow alternate merging when appropriate Correct answer.
  3. Force the smaller vehicles to stop because the truck is larger
  4. Drive on the shoulder until the merge is complete

Explanation

Where lanes merge in slow or queued traffic, drivers should cooperate and use alternate merging when the zipper rule applies. A truck driver should avoid aggressive blocking because the truck's size can magnify the hazard.

Question 50Priority Signs

When may a driver enter an intersection?

  1. Only when the driver can continue without blocking the intersection, except where traffic control requires otherwise Correct answer.
  2. Whenever the signal is green, even if the truck will stop across the junction
  3. Whenever the truck is carrying perishable goods
  4. Only after sounding the horn

Explanation

A driver should not enter an intersection if traffic conditions would force the vehicle to stop and block cross traffic or pedestrian movement. This matters for trucks because their length can block multiple lanes or crossings.