100+ Free IE F-Gas Category IV Practice Questions

Prepare for the QQI Level 5 Special Purpose Certificate in F-gas Non-Intrusive Leak Detection in RACHPT&T Systems (Category IV) exam with instant access — no signup required.

✓ No registration✓ No credit card✓ No hidden fees✓ Start practicing immediately

100+ Questions

100% Free

Loading practice questions...

Same family resources

Explore More Ireland F-Gas Refrigerant Certification

Continue into nearby exams from the same family. Each card keeps practice questions, study guides, flashcards, videos, and articles in one place.

2026 Statistics

Key Facts: IE F-Gas Category IV Exam

Leak check only

Category IV Activity Scope

EPA Ireland

No circuit break-in

Key Restriction

EPA Ireland / EU 2015/2067

Any charge size

Non-Intrusive Check Limit

EPA Ireland

QQI Level 5

Award Class (Special Purpose)

QQI Award Standard

5N0102

QQI Component Code

F-Gas Registration Ltd

100

Free Practice Questions

OpenExamPrep

Ireland's F-Gas Category IV certificate (QQI Level 5 Special Purpose Certificate in F-gas Non-Intrusive Leak Detection in RACHPT&T Systems, component 5N0102) is a leak-check-only qualification aligned with Commission Implementing Regulation (EU) 2015/2067 Annex I. Certificate holders may carry out leak checks on stationary RACHP and truck/trailer equipment without breaking into the refrigerant circuit — on any charge size — but may not install, service, recover, repair or decommission systems. Assessment is a centre-set theory test plus a practical skills demonstration on direct and indirect leak detection, graded Pass/Fail. Training is delivered by QQI-approved providers; EPA Ireland enforces F-gas compliance and F-Gas Registration Ltd maintains the Irish company certification register. This free prep includes 100 research-based practice questions on scope, regulations, detection methods, CO2e thresholds, records, safety and environmental impact, with explanations and an AI tutor.

Sample IE F-Gas Category IV Practice Questions

Try these sample questions to test your IE F-Gas Category IV exam readiness. Each question includes a detailed explanation. Start the interactive quiz above for the full 100+ question experience with AI tutoring.

1Under EPA Ireland guidance, what is the primary activity permitted by an F-Gas Category IV personal certificate?

A.Recovery of fluorinated greenhouse gases from end-of-life domestic fridges

B.Installation and commissioning of split systems of any charge size

C.Leak checking of stationary refrigeration, air-conditioning and heat-pump equipment without breaking into the refrigerant circuit

D.Compressor replacement requiring access to the pressurised circuit

Explanation: EPA Ireland states Category IV certificate holders may carry out leak checks provided the work does not entail breaking into the refrigeration circuit containing F-gases. Recovery is Category III; intrusive servicing requires Category I or II.

2Which activity is NOT permitted under an Ireland F-Gas Category IV certificate?

A.Using an electronic leak detector at external joints without opening service valves

B.Reviewing operating pressures and temperatures as an indirect leak-check method

C.Recovering refrigerant into a recovery cylinder before equipment disposal

D.Recording leak-check results for the equipment operator

Explanation: Category IV authorises leak checking without circuit break-in. Recovery, installation, servicing, repair and decommissioning require other categories.

3A Category IV holder may leak-check a commercial chiller with a 40 kg R-410A charge without opening the circuit. Is this within scope in Ireland?

A.No — charges above 3 kg always require Category I

B.Yes — Category IV is activity-limited, not limited by refrigerant charge size for non-intrusive checks

C.No — Category IV applies only to domestic fridges

D.Yes, but only if they also hold Category III

Explanation: Unlike Category II and III, Category IV is defined by the activity (non-intrusive leak checking) rather than a 3 kg charge ceiling. EPA Ireland permits leak checks on any plant if the circuit is not broken into.

4Compared with Category II, Category IV certification in Ireland is:

A.Broader — Category IV includes recovery from any charge size

B.Identical — both categories cover the same intrusive servicing tasks

C.Narrower for handling work — leak checking only without circuit access, with no installation or recovery authority

D.Limited to hermetically sealed domestic units only

Explanation: Category II covers installation, servicing, recovery and non-intrusive leak checks within charge limits. Category IV covers only non-intrusive leak checking on any size.

5A facilities manager wants annual leak checks on rooftop packaged units without opening service ports. Which personal certificate is sufficient?

A.F-Gas Category III (recovery only)

B.No personal certificate is required for external visual checks only

C.Only a company F-Gas certificate — personal certification is optional

D.F-Gas Category IV (non-intrusive leak detection)

Explanation: Statutory leak checks must be carried out by certified natural persons. Category IV qualifies personnel for leak checking without breaking into the circuit.

6Opening a service valve to attach gauge hoses for a pressure reading would:

A.Break into the refrigeration circuit and exceed Category IV authority unless the holder also holds Category I or II

B.Always be permitted under Category IV on any system

C.Be exempt because gauge hoses are not part of the circuit

D.Require only Category III certification

Explanation: Breaking into the pressurised refrigerant circuit — including opening service valves to connect gauges — is not Category IV work. Non-intrusive methods must avoid circuit access.

7The QQI award title for Ireland F-Gas Category IV is:

A.Level 5 Special Purpose Certificate in F-gas Recovery from Small RACHPT&T Systems Category III

B.Level 5 Special Purpose Certificate in F-gas Non-Intrusive Leak Detection in RACHPT&T Systems Category IV

C.Level 6 Craft Certificate in Refrigeration

D.Level 5 MAC Vehicle Air-Conditioning Attestation

Explanation: QQI's validated award standard uses this exact title for Category IV training aligned with Commission Implementing Regulation (EU) 2015/2067 Annex I Category IV.

8F-Gas Registration Ltd lists the QQI component code for Category IV as:

A.5N0102

B.5N0105

C.5N0104

D.5S0108

Explanation: F-Gas Registration Ltd's certification booklet identifies Category IV as QQI 5N0102 (Special Purpose Certificate) for leak testing of equipment.

9Category II and Category IV both allow non-intrusive leak checking. The key difference is:

A.Category IV may break into the circuit on large systems

B.Category II also authorises installation, servicing and recovery within charge limits; Category IV authorises leak checking only

C.Category II cannot perform any leak checking

D.Category IV is limited to systems under 3 kg charge

Explanation: EPA Ireland permits Category II holders to leak-check without circuit break-in on any size, but Category IV is a standalone leak-check-only qualification without other handling rights.

10Refrigeration units of refrigerated trucks and trailers are included in the Category IV QQI standard. This means:

A.Category IV holders may recover refrigerant from any truck unit

B.Truck units are exempt from all F-Gas leak-check rules

C.Truck units always require the separate MAC vehicle attestation

D.Category IV holders may perform non-intrusive leak checks on qualifying truck/trailer units without circuit break-in

Explanation: The QQI Category IV standard covers stationary RACHP and truck/trailer refrigeration units for non-intrusive leak detection, aligned with EU 2015/2067.

About the IE F-Gas Category IV Exam

Ireland's F-Gas Category IV personal certificate (QQI Level 5 Special Purpose Certificate in F-gas Non-Intrusive Leak Detection in RACHPT&T Systems) authorises leak checking of stationary refrigeration, air-conditioning, heat-pump equipment and refrigerated truck/trailer units — provided the work does not entail breaking into the refrigerant circuit. Unlike Categories II and III, Category IV is activity-limited rather than charge-limited: holders may perform non-intrusive leak checks on any plant size but may not install, service, recover, repair or decommission equipment. It suits facilities maintenance staff, energy auditors and others monitoring F-gas systems for compliance.

Assessment

QQI-validated programme: theory-based test per EU 2015/2067 Annex I Category IV plus a skills demonstration on direct and indirect non-intrusive leak detection. This practice bank is 100 selected-response items for self-study.

Time Limit

Set by the approved training provider (no single national MCQ paper)

Passing Score

Pass/Fail on theory and practical assessments (centre-assessed)

Exam Fee

Varies by QQI-approved training provider (Quality and Qualifications Ireland (QQI) through approved training providers; EPA Ireland oversees compliance)

IE F-Gas Category IV Exam Content Outline

18%

Category IV Scope & Permissions

Leak-check-only authority, no circuit break-in, comparison with other categories, QQI award and mutual recognition

18%

F-Gas Regulations (Ireland & EU)

EU 517/2014, EPA Ireland, EU 2015/2067, company certification, operator duties and records

22%

Leak Detection Methods

Direct vs indirect methods, detector sensitivity, survey technique and escalation to intrusive repair

15%

Leak-Check Frequency & CO2e Thresholds

5 / 50 / 500 tonne CO2e bands, fixed leak detection, hermetic exemptions and calculations

12%

Records & Operator Duties

Documentation, retention, post-repair follow-up, contractor reports and enforcement

10%

Safety & PPE

Work at height, confined spaces, flammable refrigerants, SDS and Chemical Agents Regulations

Environmental Impact & Refrigerants

GWP/CO2e, HFC phase-down, R-32 A2L and emission-prevention purpose

How to Pass the IE F-Gas Category IV Exam

What You Need to Know

Passing score: Pass/Fail on theory and practical assessments (centre-assessed)
Assessment: QQI-validated programme: theory-based test per EU 2015/2067 Annex I Category IV plus a skills demonstration on direct and indirect non-intrusive leak detection. This practice bank is 100 selected-response items for self-study.
Time limit: Set by the approved training provider (no single national MCQ paper)
Exam fee: Varies by QQI-approved training provider

Keys to Passing

Work through all 100 available questions
Review every answer and explanation
Track weak areas and revisit them
Use our AI tutor for tough concepts

IE F-Gas Category IV Study Tips from Top Performers

1Category IV = leak checking only — no opening service valves, no recovery, no repair

2Unlike Cat II/III, there is no 3 kg limit for non-intrusive leak checks under Category IV

3Know direct methods (sniffer, bubbles, UV dye) vs indirect (pressures, temperatures, levels)

4Memorise CO2e bands: 5 t = 12 months, 50 t = 6 months, 500 t = 3 months; fixed detector doubles each

5Electronic detectors must sense leaks down to about 5 grams per year

6Complete all 100 practice questions and review every miss with the AI tutor before your centre assessment

Frequently Asked Questions

What can an Ireland F-Gas Category IV certificate holder do?

Category IV authorises leak checking of stationary refrigeration, air-conditioning, heat-pump equipment and refrigerated truck/trailer units, provided the work does not entail breaking into the refrigerant circuit containing F-gases. It does not permit installation, servicing, recovery, repair or decommissioning.

Is Category IV limited to systems under 3 kg charge?

No. Unlike Category II and III, Category IV is defined by the activity (non-intrusive leak checking) rather than a 3 kg charge ceiling. EPA Ireland permits leak checks on any plant size if the circuit is not broken into.

Who awards the Ireland F-Gas Category IV certificate?

QQI (Quality and Qualifications Ireland) validates the training programme and award standard. Learners complete training and assessment at a QQI-approved provider and receive the Level 5 Special Purpose Certificate in F-gas Non-Intrusive Leak Detection in RACHPT&T Systems Category IV.

How is the Category IV exam assessed?

Assessment comprises a theory-based test covering EU 2015/2067 Annex I Category IV knowledge requirements and a skills demonstration on non-intrusive leak detection using direct and indirect methods. Both must be passed; the qualification is graded Pass/Fail by the approved centre.

What is the difference between Category II and Category IV leak checking?

Both may perform non-intrusive leak checks without circuit break-in. Category II also authorises installation, servicing and recovery within charge limits. Category IV is a standalone leak-check-only qualification with no other handling authority.

Is this free Category IV practice test enough to pass?

Our 100 practice questions cover theory on scope, leak detection methods, CO2e thresholds, regulations, records and safety, with teaching explanations and a free AI tutor. You must still complete the QQI-approved practical skills demonstration at an accredited training centre.