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100+ Free C&G 2391-52 Practice Questions

Pass your City & Guilds 2391-52 Level 3 Award in Initial Verification and Periodic Inspection & Testing of Electrical Installations exam on the first try — instant access, no signup required.

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2026 Statistics

Key Facts: C&G 2391-52 Exam

100

Practice Questions

OpenExamPrep

60

MCQ Exam Questions

City & Guilds

120 min

MCQ Time Limit

City & Guilds

75%

MCQ Passing Score

City & Guilds

Open book

BS 7671 Permitted

City & Guilds

C1/C2/C3/FI

EICR Codes (GN3)

IET GN3

The City & Guilds 2391-52 Level 3 Award combines initial verification and periodic inspection and testing of electrical installations, covering both new work (Electrical Installation Certificates) and existing installations (Electrical Installation Condition Reports). The qualification is assessed by an open-book online multiple-choice exam of 60 questions over 120 minutes with a 75% pass mark, plus a separate short-written exam and a practical inspection and testing assessment, all aligned to BS 7671:2018+A2:2022 and IET Guidance Note 3. Candidates must master the sequence of tests, continuity, insulation resistance, polarity, earth fault loop impedance (Ze/Zs), prospective fault current, RCD testing and EICR observation coding (C1, C2, C3, FI). This free prep includes 100 research-based practice questions with explanations and an AI tutor.

Sample C&G 2391-52 Practice Questions

Try these sample questions to test your C&G 2391-52 exam readiness. Each question includes a detailed explanation. Start the interactive quiz above for the full 100+ question experience with AI tutoring.

1Which document is the UK national standard for the requirements of electrical installations that the 2391-52 inspector verifies against?
A.The Electricity at Work Regulations 1989
B.BS 7671 Requirements for Electrical Installations (IET Wiring Regulations)
C.IET Guidance Note 3
D.The Building Regulations Part P
Explanation: BS 7671 (the IET Wiring Regulations) is the recognised national standard against which the design, erection, inspection and testing of an electrical installation is verified. Inspection and testing confirms the installation complies with BS 7671.
2Which of the following is a STATUTORY document an inspector must work within?
A.IET On-Site Guide
B.Electricity at Work Regulations 1989
C.Guidance Note 3
D.BS 7671
Explanation: The Electricity at Work Regulations 1989 are statutory (legally enforceable under the Health and Safety at Work etc. Act 1974). BS 7671 and IET guidance are non-statutory but provide a means of complying with the statutory requirements.
3Which IET publication contains the standard model forms and detailed guidance for inspection and testing, including the C1/C2/C3/FI classification table?
A.Guidance Note 1
B.Guidance Note 3: Inspection & Testing
C.Guidance Note 8
D.BS 7671 Appendix 4
Explanation: IET Guidance Note 3 (Inspection & Testing), aligned to BS 7671:2018+A2:2022, gives detailed test procedures and the observation classification codes (C1, C2, C3, FI) in Table 3.5. It is the recognised industry reference for the inspector.
4Which part of BS 7671 deals specifically with inspection and testing?
A.Part 4
B.Part 5
C.Part 6
D.Part 7
Explanation: Part 6 of BS 7671 covers inspection and testing, including initial verification (Chapter 64) and periodic inspection and testing (Chapter 65). The inspector applies Part 6 when verifying an installation.
5The certification document issued on completion of a NEW installation, an addition or an alteration is the:
A.Electrical Installation Condition Report (EICR)
B.Electrical Installation Certificate (EIC)
C.Minor Electrical Installation Works Certificate only
D.PAT test record
Explanation: An Electrical Installation Certificate (EIC) is issued for new work and for additions or alterations that include a new circuit. It confirms initial verification has been carried out and the installation complies with BS 7671 at the time of certification.
6An Electrical Installation Certificate (EIC) must be accompanied by which two schedules?
A.Schedule of Inspections and Schedule of Test Results
B.Schedule of Defects and Schedule of Loads
C.Schedule of Circuits and Schedule of Bonding
D.Schedule of Observations and Schedule of Limitations
Explanation: A valid EIC requires a Schedule of Inspections and a Schedule of Test Results. Without both schedules the certificate is incomplete and does not properly record the initial verification.
7How many signatures (responsible persons) are required on a standard Electrical Installation Certificate for new work?
A.One, for the installer only
B.Two, for design and construction only
C.Up to three, for design, construction and inspection & testing
D.Four, including the client
Explanation: The standard EIC provides for up to three signatures covering design, construction, and inspection & testing. Where one competent person is responsible for all three, a single signature against all sections is acceptable.
8A Minor Electrical Installation Works Certificate (MEIWC) is appropriate for:
A.A complete rewire of a dwelling
B.An addition or alteration that does NOT include a new circuit
C.Installing a new consumer unit
D.Any new final circuit added to an installation
Explanation: A Minor Works Certificate covers additions and alterations that do not extend to the provision of a new circuit, for example adding a socket-outlet to an existing ring final circuit. New circuits require a full EIC.
9Initial verification of a new installation must be carried out:
A.Only after the installation has been energised for a month
B.During erection and on completion, before the installation is put into service
C.Only when requested by the client
D.At least 12 months after commissioning
Explanation: BS 7671 requires initial verification by inspection and testing during erection and on completion, before the installation is put into service. This confirms compliance and that the work is safe to energise and use.
10Before any dead testing begins on an installation, the inspector must FIRST:
A.Carry out an insulation resistance test
B.Safely isolate and prove the circuit is dead using an approved voltage indicator
C.Measure earth fault loop impedance
D.Sign the Electrical Installation Certificate
Explanation: Safe isolation is the essential first step: lock off, prove dead with an approved voltage indicator (GS38), and re-prove the tester on a known source before and after. This protects the inspector before dead tests are performed.

About the C&G 2391-52 Exam

The City & Guilds 2391-52 is the Level 3 Award in Initial Verification and Periodic Inspection & Testing of Electrical Installations, combining the content of the 2391-50 (initial verification) and 2391-51 (periodic inspection). It is assessed by an open-book online multiple-choice exam of 60 questions in 120 minutes (75% to pass), a short-written exam and a practical assessment, all to BS 7671:2018+A2:2022.

Assessment

The online multiple-choice e-volve exam has 60 questions over 120 minutes, open book (BS 7671 permitted), with a 75% pass mark, plus a separate short-written exam and a practical inspection and testing assessment; this practice bank is 100 selected-response items covering the theory

Time Limit

120 minutes (online multiple-choice component)

Passing Score

75% on the online multiple-choice exam (written and practical assessed separately)

Exam Fee

Included in the course fee; typically GBP 700-1,000 for the full course and assessments (varies by provider) (City & Guilds)

C&G 2391-52 Exam Content Outline

18%

Statutory documents, certification (EIC & EICR)

Statutory and non-statutory documents, the Electrical Installation Certificate and schedules, the Minor Works Certificate and the Electrical Installation Condition Report

18%

Initial verification requirements & inspection

Safe isolation, visual inspection, functional testing, additions and alterations and verifying new work against BS 7671 before energising

10%

Sequence of tests & dead testing

Correct order of dead and live tests, why continuity precedes insulation resistance and the use and calibration of test instruments

20%

Continuity, insulation resistance & polarity

Continuity of protective conductors and ring final circuits, main bonding, insulation resistance test voltages and minimum values, and polarity verification

22%

Loop impedance, PFC, RCD & earth electrode

Ze and Zs measurement and limits, disconnection times, prospective fault current, RCD testing to Amendment 2, and earth electrode resistance on TT systems

12%

Periodic inspection & EICR condition reporting

Purpose of periodic inspection, sampling and limitations, observation codes C1/C2/C3/FI, satisfactory/unsatisfactory outcomes and inspection intervals

How to Pass the C&G 2391-52 Exam

What You Need to Know

  • Passing score: 75% on the online multiple-choice exam (written and practical assessed separately)
  • Assessment: The online multiple-choice e-volve exam has 60 questions over 120 minutes, open book (BS 7671 permitted), with a 75% pass mark, plus a separate short-written exam and a practical inspection and testing assessment; this practice bank is 100 selected-response items covering the theory
  • Time limit: 120 minutes (online multiple-choice component)
  • Exam fee: Included in the course fee; typically GBP 700-1,000 for the full course and assessments (varies by provider)

Keys to Passing

  • Complete 500+ practice questions
  • Score 80%+ consistently before scheduling
  • Focus on highest-weighted sections
  • Use our AI tutor for tough concepts

C&G 2391-52 Study Tips from Top Performers

1Practise navigating BS 7671 quickly - the exam is open book and many questions test where to find a regulation or value
2Memorise the dead-test then live-test sequence and know why continuity must precede the insulation resistance test
3Learn the key values: 500 V DC and 1 MOhm minimum insulation resistance, 30 mA RCD trip within 40 ms at 5x, and 50 V touch-voltage limit for TT
4Know the EICR codes cold: only C1, C2 or FI make a report unsatisfactory; C3 alone keeps it satisfactory
5Understand Zs = Ze + (R1 + R2) and the 0.8 rule-of-thumb when comparing a cold measurement against tabulated maximum Zs
6Complete all 100 practice questions and review every miss with the AI tutor before sitting the exam

Frequently Asked Questions

How many questions are on the City & Guilds 2391-52 multiple-choice exam and how long is it?

The online e-volve multiple-choice exam has 60 questions and lasts 120 minutes. It is open book (you may use BS 7671), and you need 75% to pass. There is also a separate short-written exam and a practical assessment.

What score do I need to pass the 2391-52 exam?

You need 75% to pass the online multiple-choice component. The short-written exam and the practical inspection and testing assessment are graded separately, and all three must be completed to achieve the award.

What is the difference between 2391-50, 2391-51 and 2391-52?

The 2391-50 covers initial verification of new work, the 2391-51 covers periodic inspection of existing installations, and the 2391-52 combines both into a single award covering Electrical Installation Certificates and Electrical Installation Condition Reports.

Is the 2391-52 exam open book?

Yes. The multiple-choice exam is open book, so you may refer to BS 7671:2018+A2:2022. Many questions require you to navigate the regulations and apply correct test values, so practising with the standard is essential.

What are the EICR codes C1, C2, C3 and FI?

C1 means danger present (immediate action), C2 means potentially dangerous (urgent action), C3 means improvement recommended (no fail), and FI means further investigation required. Any C1, C2 or FI makes an EICR unsatisfactory.

Is this free 2391-52 practice as good as paid prep?

Our 100 practice questions cover the full 2391-52 theory syllabus with a teaching explanation for every answer, real BS 7671 and GN3 values, plus free daily AI tutor interactions. All content is free forever and updated for 2026.