106+ Free Inspection & Testing (ET105) Practice Questions

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2026 Statistics

Key Facts: Inspection & Testing (ET105) Exam

100

Practice Questions

OpenExamPrep

5 years

QC V&C Renewal Cycle

CRU Criteria Document

City & Guilds 2407

V&C Qualification

Safe Electric

1 MΩ

Min IR at 500 V DC (LV)

I.S. 10101 Chapter 6

300 ms / 40 ms

30 mA RCD Trip at 1× / 5×

I.S. 10101

I.S. 10101:2020

National Wiring Rules

NSAI

<50 kVA

Certificate No. 1 Threshold

Safe Electric

NFQ Level 6

Minimum Entry Qualification

CRU / V&C providers

Ireland's Safe Electric Verification and Certification course (City & Guilds 2407) qualifies electricians to inspect, test and certify installations to I.S. 10101:2020. Candidates need an NFQ Level 6 electrical craft certificate, pass written and practical assessments at a CRU-approved centre, and renew every five years. QCs issue Completion Certificates No. 1–3 and Periodic Inspection Reports through the Safe Electric scheme overseen by the CRU. Course fees at major providers range from about €399 for a 2-day experienced course to €749 for a 4-day standard programme. This free prep includes 100 research-based practice questions with explanations and an AI tutor.

Sample Inspection & Testing (ET105) Practice Questions

Try these sample questions to test your Inspection & Testing (ET105) exam readiness. Each question includes a detailed explanation. Start the interactive quiz above for the full 106+ question experience with AI tutoring.

1Under the Electricity Regulation Act 1999, who regulates electrical contractors in Ireland with respect to safety?

A.The Commission for Regulation of Utilities (CRU), with Safe Electric as the Electrical Safety Supervisory Body

B.The National Standards Authority of Ireland (NSAI) only

C.ESB Networks as the Distribution System Operator

D.The Health and Safety Authority (HSA) as sole regulator

Explanation: The CRU regulates electrical contractor safety under the Electricity Regulation Act 1999. Safe Electric (operated by RECI) is the designated Electrical Safety Supervisory Body that inspects work, validates certificates and maintains the register of contractors.

2What qualification must a Named Qualified Certifier (QC) hold before certifying electrical works for a Registered Electrical Contractor?

A.Successfully complete a CRU-recognised Verification and Certification of Electrical Installations course (e.g. City & Guilds 2407)

B.A SOLAS Phase 1 electrical apprenticeship record only

C.An NSAI standards-sales certificate for I.S. 10101

D.A Safe Pass card alone

Explanation: The CRU Electrical Safety Supervisory Criteria Document requires each REC to nominate a QC who holds at least a Level 6 NFQ electrical craft qualification and has passed a recognised Verification and Certification (V&C) course covering inspection, testing and completion certification to I.S. 10101.

3How often must Qualified Certifiers in the Safe Electric scheme normally renew their Verification and Certification training?

A.Every five years

B.Every year

C.Every ten years

D.Only once at initial registration with no renewal

Explanation: The CRU Criteria Document requires all QCs to complete the mandatory V&C course once every five years. Training providers such as Electrical Skills issue City & Guilds 2407 qualifications valid for five years before re-assessment is required.

4Which Irish standard currently defines the national rules for electrical installations that completion certificates must confirm compliance with?

A.I.S. 10101:2020 (National Rules for Electrical Installations)

B.BS 7671:2018 (UK Wiring Regulations) as the primary Irish rule book

C.ET 105:2011 (Potentially Explosive Atmospheres) for all domestic works

D.IEC 60364-1 without any Irish national deviations

Explanation: I.S. 10101:2020 replaced ET 101:2008 as Ireland's National Rules for Electrical Installations. Safe Electric completion certificates confirm that controlled works were inspected and tested in accordance with this standard.

5Who is legally permitted to issue a Safe Electric Completion Certificate for controlled electrical works?

A.Only the REC's named Qualified Certifier on behalf of the Registered Electrical Contractor

B.Any electrician employed by the REC regardless of QC status

C.The customer after the REC provides test results

D.ESB Networks when energising a new supply

Explanation: Only the REC's nominated QC may certify controlled works. The QC confirms that inspection and testing were completed to I.S. 10101 and that post-connection tests are recorded on the certificate and test record sheet.

6A Registered Electrical Contractor (REC) must issue a Completion Certificate for:

A.All electrical works except minor works (unless the customer requests certification of minor works)

B.Only new-build houses above 50 kVA

C.Only works above €5,000 in value

D.No works — certification is optional throughout Ireland

Explanation: The Electricity Regulation Act 1999 makes completion certification mandatory for controlled works. Minor works need not be certified unless the customer requests it, but all other REC-controlled works require a completion certificate and test record sheet.

7Safe Electric Inspectors primarily verify that REC installations comply with:

A.I.S. 10101 and the Safe Electric regulatory requirements including correct certification

B.BS 7671 Amendment 2 only

C.Manufacturer equipment manuals without reference to national rules

D.Local authority planning permissions only

Explanation: Safe Electric inspectors audit REC processes and inspect sample installations to confirm compliance with I.S. 10101 and scheme rules, including valid qualifications, possession of current wiring rules, and correctly completed certificates and test records.

8The City & Guilds qualification commonly awarded on successful completion of an Irish V&C course is:

A.2407 Electrical Testing and Verification of Electrical Installations (Ireland)

B.2382 Requirements for Electrical Installations (BS 7671)

C.2391 Inspection and Testing (UK-only legacy reference)

D.2377 Portable Appliance Testing only

Explanation: Irish V&C courses recognised by Safe Electric typically award City & Guilds 2407, covering visual inspection, initial verification, periodic testing and completion documentation to I.S. 10101.

9Before enrolling on a Verification and Certification course, a candidate typically must hold:

A.An electrical Advanced Craft Certificate (NFQ Level 6) or equivalent qualification

B.A Junior Certificate school leaver record only

C.A Safe Electric customer complaint reference number

D.An ESB Networks connection application only

Explanation: Access to V&C training is restricted to qualified electricians. Providers require a National Craft Certificate or equivalent Level 6 electrical award, because the course assumes competence in installation work before teaching verification and certification procedures.

10Safe Electric routinely inspects each Registered Electrical Contractor at least:

A.Once per year

B.Once every five years only

C.Only at initial registration and never again if no faults are found

D.Monthly for all contractors regardless of performance

Explanation: The Safe Electric inspection guideline states every REC shall be inspected at least once annually. Higher-risk contractors with poor audit scores may be inspected more frequently under the risk-based inspection programme.

About the Inspection & Testing (ET105) Exam

Ireland's Verification and Certification (V&C) qualification authorises Qualified Certifiers to inspect, test and issue Safe Electric completion certificates confirming compliance with I.S. 10101:2020. The course covers visual inspection, initial verification dead and live tests, periodic inspection reporting, and completion documentation for Certificates No. 1–3. It is mandatory for REC-nominated QCs and must be renewed every five years.

Assessment

CRU-recognised Verification and Certification course with visual inspection, initial verification, periodic testing modules, written exam and practical assessment. Successful candidates receive City & Guilds 2407, valid five years for QC registration.

Time Limit

2-day (experienced testers) or 4-day (standard) course; written exam duration set by provider

Passing Score

Pass the provider's written assessment and practical verification exercises (City & Guilds 2407)

Exam Fee

€399–€749 at approved training providers (fees vary; contact centre for current pricing) (Commission for Regulation of Utilities (CRU) with courses delivered by approved centres and QC registration through Safe Electric (RECI))

Inspection & Testing (ET105) Exam Content Outline

18%

Safe Electric Regulation & QC

CRU, REC/QC roles, V&C renewal, City & Guilds 2407, controlled works, inspector audits

18%

Certification & Documentation

Certs No. 1–3, pre/post-connection, test record sheets, PIR, NoHz, agricultural/interim certs

12%

Visual Inspection

Board checks, bonding, special locations, EV/PV, defects, safe isolation

18%

Dead Tests

Continuity, ring finals, insulation resistance, polarity, R1+R2

15%

Live Tests

Ze/Zs, RCD trip times, PFC, phase rotation, functional testing

10%

Periodic Verification

PIR coding, inspection frequency, workplace duties, remedial follow-up

Calculations & Integration

Loop impedance maths, fault current, certificate selection, full verification sequence

How to Pass the Inspection & Testing (ET105) Exam

What You Need to Know

Passing score: Pass the provider's written assessment and practical verification exercises (City & Guilds 2407)
Assessment: CRU-recognised Verification and Certification course with visual inspection, initial verification, periodic testing modules, written exam and practical assessment. Successful candidates receive City & Guilds 2407, valid five years for QC registration.
Time limit: 2-day (experienced testers) or 4-day (standard) course; written exam duration set by provider
Exam fee: €399–€749 at approved training providers (fees vary; contact centre for current pricing)

Keys to Passing

Work through all 106 available questions
Review every answer and explanation
Track weak areas and revisit them
Use our AI tutor for tough concepts

Inspection & Testing (ET105) Study Tips from Top Performers

1Learn which certificate applies: Cert No. 1 (<50 kVA new DSO), Cert No. 2 (≥50 kVA new DSO), Cert No. 3 (alterations), PIR (periodic condition)

2Memorise the dead-test sequence: continuity → insulation resistance → polarity, then live tests after energisation

3Know RCD trip limits: 300 ms at 1× IΔn and 40 ms at 5× IΔn for 30 mA additional protection

4Understand Zs ≈ Ze + (R1+R2) and minimum insulation resistance of 1 MΩ at 500 V DC for LV circuits

5Review Safe Electric pre-connection and post-connection workflow for Cert No. 1 and No. 2

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

Frequently Asked Questions

What is the ET105 inspection and testing exam in Ireland?

In Irish electrical training, inspection and testing competence is assessed through the CRU-recognised Verification and Certification (V&C) course, typically awarding City & Guilds 2407. It covers I.S. 10101 Chapter 6 inspection and testing procedures and Safe Electric completion certification—not the withdrawn ET 105:2011 explosive atmospheres standard.

Who needs the Verification and Certification course?

Every Qualified Certifier (QC) nominated by a Registered Electrical Contractor must complete the V&C course before certifying controlled works. The QC inspects and tests installations and issues Safe Electric completion certificates and test record sheets.

How often must QCs renew V&C training?

The CRU Electrical Safety Supervisory Criteria Document requires QCs to complete the mandatory V&C course once every five years. City & Guilds 2407 qualifications issued by approved centres follow the same renewal cycle.

What is the difference between Certificate No. 1 and Certificate No. 3?

Certificate No. 1 covers new installations under 50 kVA requiring DSO connection with pre- and post-connection tests. Certificate No. 3 covers alterations, additions and extensions to existing installations that do not require a new DSO connection.

What tests are required at initial verification?

I.S. 10101 Chapter 6 requires visual inspection, dead tests (continuity, insulation resistance, polarity), then after energisation live tests including earth fault loop impedance and RCD operation where installed. Results are recorded on the test record sheet.

Is this free inspection and testing practice enough to pass the V&C course?

Our 100 practice questions cover Safe Electric certification, I.S. 10101 Chapter 6 procedures and common test values with teaching explanations plus free daily AI tutor interactions. Practical instrument skills are also assessed at the training centre—use this bank to reinforce theory before and after your course.