For an Irish truck mock, answer 100 category C questions in 120 minutes and reach 74 correct; Citizens Information sets the format, and the runner explains each answer. Source: Citizens Information, page edited 6 May 2026, checked on 15 September 2026.
A countdown runs for the full time allowed, so you practise your pace as well as your answers.
Flag and come back
Mark any question you are unsure of and jump back to it from the question grid before you finish.
Results by topic
Your score is broken down by study area, with a link to the lesson for each one you need to revisit.
Every answer explained
Review each question afterwards with the explanation and the Irish law it comes from.
Official format
The official format
Question count, time limit and pass mark come from the official test description.
Theory test formats
Test
Questions
Minutes
Correct to pass
Truck (C)
100
120
74
Source: Truck (C), 2026-05-06, checked on 2026-09-15
On the day
What the test screen lets you do
Timing display
A built-in countdown timer and progress tracking are shown on screen
Source: Prometric Ireland Ltd (Driver Theory Test Service), Accessibility and support options, dated 2026-06-11, checked on 2026-09-15
Skipping and flagging questions
Questions can be skipped or marked and returned to at any stage within the test time
Source: Prometric Ireland Ltd (Driver Theory Test Service), Driver Theory Test FAQs, dated 2026-08-14, checked on 2026-09-15
Changing and reviewing answers
An answer can be cancelled and another selected, and all answers can be reviewed and changed before finishing
Source: Prometric Ireland Ltd (Driver Theory Test Service), Driver Theory Test FAQs, dated 2026-08-14, checked on 2026-09-15
How questions are drawn
Questions are selected at random from the question bank for the relevant test sections
Source: Prometric Ireland Ltd (Driver Theory Test Service), Driver Theory Test FAQs, dated 2026-08-14, checked on 2026-09-15
Try it now
Sample questions and answers
1 of 20
Question 1
A third country national drives goods internationally for a haulier in the Community. How may the driver prove the CPC qualification?
ABy the driving licence alone
BBy a driver attestation bearing code 95Correct answer
CBy a letter from the employer confirming the driver experience
DBy a tachograph printout covering the last working week
Show the answerHide the answer
Correct answer: B
A third country driver carrying goods may prove the qualification by a driver attestation bearing code 95. This is Article 10(2) and (3) of Directive (EU) 2022/2561.
Heavy snow closes the motorway and the driver cannot reach a safe place to stop within the allowed driving time. What may the driver do?
ANothing, because the driving limits have no exceptions of any kind
BDepart from the rules as far as needed to reach a suitable stopping place and ensure the safety of persons, the vehicle or its loadCorrect answer
CContinue to the original destination, because weather never justifies a change
DStop on the hard shoulder and remain there until the road reopens
Show the answerHide the answer
Correct answer: B
Provided road safety is not jeopardised, a driver may depart from Articles 6 to 9 as far as necessary to reach a suitable stopping place and to ensure the safety of persons, the vehicle or its load. This is the first paragraph of Article 12 of Regulation (EC) No 561/2006.
The two axles of a tandem on your goods vehicle are less than 1.0 metre apart. What is the tandem weight limit?
A16 tonnes
B18 tonnes
C19 tonnes
D11.5 tonnesCorrect answer
Show the answerHide the answer
Correct answer: D
A tandem axle under 1.0 metre apart is limited to 11.5 tonnes. 16 tonnes is the next spacing band, 18 tonnes is the band from 1.3 metres to under 1.8 metres, and 19 tonnes needs extra driving-axle conditions. This is the tandem axle weight rule in regulation 6 of the Road Traffic (Construction and Use of Vehicles) Regulations 2003, as substituted by the Road Traffic (Construction and Use of Vehicles) (Amendment) (No. 2) Regulations 2014.
A new category C truck has been built but not yet put into service, and it is being driven on a test run. Are the driver CPC regulations applied to it?
ANo, a new vehicle not yet in service is outside the regulationsCorrect answer
BYes, all category C vehicles are covered
CYes, unless the driver already holds a driver CPC
DYes, because the vehicle is on a public road
Show the answerHide the answer
Correct answer: A
The regulations do not apply to a vehicle undergoing road tests for technical development, repair or maintenance, or to a new or rebuilt vehicle that has not yet been put into service. This is Regulation 6(2)(c) and (d) of S.I. No. 359 of 2008.
How many hours of periodic Driver CPC training must you complete in each training period?
AAt least 28 hours
BAt least 40 hours
CAt least 35 hoursCorrect answer
DAt least 7 hours
Show the answerHide the answer
Correct answer: C
Periodic training is a total of at least 35 hours in each training period. Seven hours is the size of each block, not the full total, and 28 or 40 hours are the wrong totals. This is the periodic training rule in the European Communities (Vehicle Drivers Certificate of Professional Competence) (No. 2) Regulations 2008.
You are approaching the entrance to a road tunnel and see this sign. What does this sign tell you not to do?
ADrive past in a car with passengers
BRide past on a motorcycle
CDrive past in a lorry carrying timber
DDrive past in a van carrying explosive materialCorrect answer
Show the answerHide the answer
Correct answer: D
Regulation 20 of the Road Traffic (Traffic Signs) Regulations 2025 provides that, at or near the entrance to a road tunnel, the driver of a vehicle carrying explosive material must not go past this sign. A load of timber, passengers or a motorcycle on its own is not caught by it.
Your articulated goods vehicle must be able to be driven within which pair of concentric circles, without any part projecting outside?
A15 metres and 6 metres
BCircles of 12.50 metres and 5.30 metresCorrect answer
C10 metres and 4 metres
D12 metres and 2.04 metres
Show the answerHide the answer
Correct answer: B
A mechanically propelled vehicle, articulated vehicle or combination must be able to be driven within concentric circles of 12.50 metres and 5.30 metres without any part projecting outside. 15 and 6, 10 and 4, and 12 and 2.04 are not that pair. This is the turning-circle rule in regulation 45 of the Road Traffic (Construction and Use of Vehicles) Regulations 2003, as amended by the Road Traffic (Construction and Use of Vehicles) (Amendment) Regulations 2017.
BA space only for electric vehicles that are rechargingCorrect answer
CA speed limit of 120 km/h
DA shared zone for pedestrians, cyclists and vehicles
Show the answerHide the answer
Correct answer: B
You are looking at the electric vehicle recharging only sign. Part 2 of Schedule 2 to the Road Traffic (Traffic Signs) Regulations 2025 lists it among the restrictive signs made under Regulation 22. It keeps the space for electric vehicles while they recharge.
A driver is working abroad for a haulier based in the State. Where must the driver be able to return to, under the four week rule?
AAny depot of the undertaking in any Member State
BThe employer operational centre in the establishment State, or the driver place of residenceCorrect answer
CThe place where the driver first took charge of the vehicle
DThe head office of the customer the driver serves most often
Show the answerHide the answer
Correct answer: B
The return is to the employer operational centre in the establishment State, or to the driver place of residence, so that a qualifying weekly rest can be spent there. This is Article 8(8a) of Regulation (EC) No 561/2006.
A goods vehicle is modified so that it has more than four axles. Besides the 36 tonne cap, what else must it have?
AABS or EBS, and air suspensionCorrect answer
BA second steering axle only
CA drawbar trailer on every run
DA speed limiter set below the ordinary goods figure
Show the answerHide the answer
Correct answer: A
A vehicle modified to more than four axles has the same 36 tonne cap and needs ABS or EBS and air suspension. A second steering axle, a drawbar trailer, or a lower speed limiter setting is not that condition. This is the extra-axle rigid weight rule in regulations 11A and 11B of the Road Traffic (Construction and Use of Vehicles) Regulations 2003, as inserted by the Road Traffic (Construction and Use of Vehicles) (Amendment) Regulations 2018.
Does the commercial vehicle roadworthiness test apply to goods trailers of categories O3 and O4?
ANo, trailers are outside the test
BYes, but only where the design speed is under 25 km/h
CYes, among other vehicles, where the design speed exceeds 25 km/hCorrect answer
DNo, only the drawing vehicle is tested
Show the answerHide the answer
Correct answer: C
Goods trailers of categories O3 and O4 sit inside the test, among other vehicles, where the design speed exceeds 25 km/h. Trailers are not outside it, the speed condition is not under 25 km/h, and the drawing vehicle is not the only unit tested. This is the testing scope rule in regulation 4 of the Commercial Vehicle Roadworthiness (Vehicle Testing) (No. 2) Regulations 2013, as substituted by the Commercial Vehicle Roadworthiness (Vehicle Testing) (Amendment) Regulations 2018.
BA track shared by pedestrians and cyclistsCorrect answer
CTurn right at the junction ahead
DA speed limit of 100 km/h
Show the answerHide the answer
Correct answer: B
You are looking at the shared track sign. Regulation 6 of the Road Traffic (Traffic Signs) Regulations 2025 provides that, with the matching road markings, it indicates a track shared by pedestrians and people on pedal cycles, e-mopeds or electric scooters.
What is the general laden weight limit for a four-axle rigid goods vehicle or trailer?
A30 tonnesCorrect answer
B32 tonnes in every case
C26 tonnes
D36 tonnes
Show the answerHide the answer
Correct answer: A
A four-axle rigid vehicle or trailer is limited to 30 tonnes laden as the general rule. 32 tonnes needs twin tyres and air suspension on each driving axle, or twin tyres and two driving axles neither exceeding 9.5 tonnes. 26 tonnes is a three-axle figure and 36 tonnes is an extra-axle cap. This is the four-axle rigid laden weight rule in regulation 11 of the Road Traffic (Construction and Use of Vehicles) Regulations 2003.
One of these signs marks a track shared by pedestrians and cyclists. Which one?
ASign A
BSign B
CSign CCorrect answer
DSign D
Show the answerHide the answer
Correct answer: C
Sign C is the shared track sign. Regulation 6 of the Road Traffic (Traffic Signs) Regulations 2025 provides that, with the matching road markings, it indicates a track shared by pedestrians and people on pedal cycles, e-mopeds or electric scooters.
Your driver qualification card has expired, your driving licence is valid but does not bear code 95, and you have finished your periodic training. May you drive a category C truck while you wait for the new card?
AYes, because the periodic training is complete
BYes, because the driving licence remains valid
CNo, the duty is to hold a valid driver CPC, and driving without one is an offenceCorrect answer
DYes, for up to one month after the card expires
Show the answerHide the answer
Correct answer: C
The duty is to hold a valid driver CPC, and a person must not drive a relevant vehicle without one. The card expiring does not end the duty, and driving in the meantime is an offence. This is Regulation 23(1)(a) and (b) of S.I. No. 359 of 2008, as substituted by S.I. No. 594 of 2025.
What is the general laden weight limit for a five-axle articulated goods vehicle?
A42 tonnes in every case
B44 tonnes in every case
C38 tonnes
D40 tonnesCorrect answer
Show the answerHide the answer
Correct answer: D
A five-axle articulated vehicle is limited to 40 tonnes laden as the general rule. 42 tonnes is for an appropriate motor vehicle with a two-axle appropriate semi-trailer, 44 tonnes is the 40 foot ISO container intermodal figure, and 38 tonnes is a four-axle articulated figure. This is the five-axle articulated weight rule in regulation 14 of the Road Traffic (Construction and Use of Vehicles) Regulations 2003, as amended by the Road Traffic (Construction and Use of Vehicles) (Amendment) Regulations 2013.
AOn any goods vehicle over 7.5 tonnes, with no further condition
BOn a goods vehicle under 2,540 kilograms unladen or with a rim under 405 millimetres, or where the recutting has cut or exposed the ply or cordCorrect answer
COn a trailer only
DOn a vehicle with air suspension only
Show the answerHide the answer
Correct answer: B
A recut tyre must not be fitted to a goods vehicle under 2,540 kilograms unladen or with a rim under 405 millimetres, nor where the recutting has cut or exposed the ply or cord. A blanket ban over 7.5 tonnes, a trailer-only ban, or an air-suspension ban is not the rule. This is the recut tyre rule in regulation 56 of the Road Traffic (Construction and Use of Vehicles) Regulations 2003.
At what rear overhang must a load carry a red warning flag or marker by day?
AOnce the overhang passes 2 metres
BOnce the overhang passes 1 metreCorrect answer
COnce the overhang passes 3 metres
DAn amber marker is enough at any overhang
Show the answerHide the answer
Correct answer: B
A load that projects more than one metre to the rear must carry a red warning flag or marker by day. Waiting until 2 metres or 3 metres is too late, and an amber marker is not the day marker this rule requires. This is the load overhang rule in the Road Traffic (Construction and Use of Vehicles) Regulations 2003.
Your two-axle rigid has 3 metres or more from the front axle to the rear axle. What is the greatest laden weight?
A16 tonnes
B20 tonnes
C18 tonnesCorrect answer
D22 tonnes
Show the answerHide the answer
Correct answer: C
At 3 metres or more from front to rear axle a two-axle vehicle is limited to 18 tonnes laden. 16 tonnes is the under 3 metre figure, and 20 and 22 tonnes are not that two-axle figure. This is the two-axle laden weight rule in regulation 9 of the Road Traffic (Construction and Use of Vehicles) Regulations 2003, as substituted by the Road Traffic (Construction and Use of Vehicles) (Amendment) Regulations 2017.
What is an indivisible load for that EU oversize rule?
AAny load over 20 tonnes, whatever its shape
BAny container, because a container cannot be opened on the road
CAny load that the customer asks to keep in one piece
DA load that cannot be divided into two or more loads for carriage by road without undue expense or risk of damage, and that cannot be carried by a vehicle or combination that complies with the Directive in all respectsCorrect answer
Show the answerHide the answer
Correct answer: D
An indivisible load cannot be divided into two or more loads for carriage by road without undue expense or risk of damage, and cannot be carried by a vehicle or combination complying with the Directive in all respects. Weight alone, a container, or the customer's wish is not the definition. This is the indivisible load definition in Article 2 of Council Directive 96/53/EC.
