Who administers the NCT Tester Competence Assessment?

The assessment is administered by Applus+ Ireland, the operator of the National Car Test (NCT) service, on behalf of the Road Safety Authority (RSA).

What is the passing score for the NCT Tester exam?

Candidates must achieve a minimum score of 80% across both the multiple-choice and practical assessment components to pass.

Are there any prerequisites to take the assessment?

Yes, candidates must be qualified mechanics with at least 3 years of relevant experience in light vehicle repair and maintenance, possess a valid driving license, and meet other specific eligibility criteria from the RSA.

Is the assessment only multiple-choice?

No, the assessment includes both a multiple-choice question section and a compulsory practical assessment component, where candidates demonstrate hands-on inspection skills.

Can I take the NCT Tester assessment remotely?

No, due to the practical assessment component involving physical vehicle inspection and equipment use, the assessment must be taken in person at an approved Applus+ assessment center.

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100+ Free NCT Tester Competence Assessment Practice Questions

NCT Vehicle Inspector / VTN Tester Competence Assessment (Ireland) practice questions are available now; exam metadata is being verified.

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2026 Statistics

Key Facts: NCT Tester Competence Assessment Exam

80%

Required Passing Score

RSA / Applus+

2-3 Hours

Approximate Exam Duration

Applus+ Assessment Guidelines

$150

Exam Fee

Applus+ Ireland

Administrator

NCT Website

This assessment qualifies mechanics as NCT Vehicle Inspectors in Ireland, covering light vehicle inspection standards, diagnostics, equipment use, and RSA regulations via MCQ and practical tests.

Sample NCT Tester Competence Assessment Practice Questions

Try these sample questions to test your NCT Tester Competence Assessment exam readiness. Each question includes a detailed explanation. Start the interactive quiz above for the full 100+ question experience with AI tutoring.

1What is the maximum permissible smoke opacity reading for a naturally aspirated diesel engine first registered before July 2008 during an NCT diesel smoke test?

A.0.5 m-1

B.1.5 m-1

C.2.5 m-1

D.3.0 m-1

Explanation: According to the NCT Manual, for naturally aspirated diesel engines registered before July 2008, the maximum permissible smoke opacity reading is 2.5 m-1. Vehicles registered from July 2008 onwards, or turbo/supercharged engines, have stricter limits.

2A light passenger vehicle has a design gross vehicle weight (DGVW) of 1500 kg. During a service brake test, the combined braking force recorded on the rollers is 9750 Newtons. What is the service brake efficiency, and does it pass the NCT requirement?

A.65%, Pass

B.50%, Fail

C.60%, Pass

D.70%, Pass

Explanation: Service brake efficiency is calculated as (Total Braking Force / (DGVW x g)) x 100. Here, (9750 N / (1500 kg x 9.81 m/s²)) x 100 = (9750 / 14715) x 100 ≈ 66.25%. The minimum required service brake efficiency for passenger cars is 50%, so approximately 66% passes (option closest is 65%, Pass).

3What is the primary concern when inspecting the aim of a vehicle's headlights during an NCT?

A.Ensuring the beam is perfectly horizontal

B.Checking for adequate illumination of the road ahead without dazzling oncoming drivers

C.Verifying the headlights match the vehicle's aesthetic design

D.Confirming the bulbs are of the correct wattage

Explanation: The primary concern for headlight aim is road safety. Headlights must illuminate the road sufficiently for the driver while being correctly aimed to prevent dazzling other road users, which is a significant safety hazard.

4Under RSA defect categorization, which of the following scenarios would most likely be classified as a 'Major' defect?

A.A minor stone chip on the windscreen outside the critical vision area

B.A single, slightly corroded brake pipe with no fluid leakage

C.A headlight bulb not emitting light, but the other headlight is fully functional

D.A small tear in the upholstery of a rear passenger seat

Explanation: A headlight bulb not emitting light significantly impairs the driver's visibility at night and makes the vehicle less visible to others, posing a direct safety risk. This is a clear Major defect as it fails to provide the required illumination.

5When checking steering-wheel free play on a vehicle fitted with power-assisted steering, why is only a small amount of free play permitted before it is treated as a defect?

A.Power steering allows more free play because the assistance compensates for slack

B.Excessive free play indicates wear in steering joints or linkage and compromises directional control

C.Free play has no effect on a power-assisted system and is checked only for comfort

D.Free play is only relevant on manual (non-assisted) steering systems

Explanation: On power-assisted steering, only a small amount of free play at the steering wheel is acceptable. Excessive play indicates wear in the steering joints, track-rod ends, or linkage, meaning wheel movement is not faithfully transmitted to the road wheels, which compromises directional control and is a defect.

6What is the minimum legal tread depth requirement for passenger car tyres in Ireland?

A.1.0 mm across the central three-quarters of the tread width

B.1.6 mm across the entire tread width

C.1.6 mm across the central three-quarters of the tread width

D.2.0 mm across the central three-quarters of the tread width

Explanation: The legal minimum tread depth for passenger car tyres in Ireland is 1.6 mm. This measurement must be consistent across the central three-quarters of the tread width and around the entire circumference of the tyre. Tyres failing this standard are a Major defect.

7If a vehicle presented for an NCT has its Malfunction Indicator Lamp (MIL) illuminated and indicating a fault with an emissions-related system, what is the most likely outcome of the test for this specific issue?

A.Advisory notice, but a pass is issued

B.A 'Minor' defect, allowing for a conditional pass

C.A 'Major' defect, resulting in a test failure

D.A 'Critical' defect, requiring immediate immobilisation

Explanation: An illuminated MIL indicating an emissions-related fault is a Major defect. This signifies that the vehicle's emissions control system is not functioning correctly, which can lead to increased pollution and potential damage to components, thus failing the NCT.

8During a visual inspection, if a shock absorber is found to have a significant, active fluid leak, what defect category should be assigned?

A.Minor defect

B.Advisory

C.Major defect

D.No defect, unless handling is affected

Explanation: An active and significant fluid leak from a shock absorber indicates a failure of the damping unit, which seriously impairs the vehicle's suspension performance, handling, and braking stability. This is classified as a Major defect, leading to a test failure.

9When inspecting vehicle bodywork, what level of corrosion on a load-bearing chassis component would typically lead to an NCT failure (Major defect)?

A.Light surface rust that can be wiped off

B.Minor localised pitting that does not affect structural integrity

C.Corrosion that has perforated the material, affecting its structural integrity

D.Cosmetic corrosion on a non-structural panel

Explanation: Corrosion that has perforated or significantly weakened a load-bearing chassis component, affecting its structural integrity, is considered a Major defect. This compromises the vehicle's safety and ability to withstand forces during operation.

10Which of the following conditions regarding a vehicle's safety belt would lead to a Major defect and an NCT failure?

A.Slight fading of the belt material due to sun exposure

B.A fully functional belt that retracts slowly

C.A belt that is frayed or cut, exposing inner fibres

D.A stained belt that is otherwise intact

Explanation: A safety belt that is frayed or cut, exposing inner fibres, has compromised structural integrity. This significantly reduces its ability to restrain an occupant in a collision, posing a serious safety risk and classifying it as a Major defect.

About the NCT Tester Competence Assessment Practice Questions

Verified exam format metadata for NCT Vehicle Inspector / VTN Tester Competence Assessment (Ireland) is pending. The practice questions above remain available while official exam length, timing, passing score, fee, and administrator details are reviewed.