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Free Practice Questions for EAL Level 3 Inspection & Testing

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Key Facts: EAL Level 3 Inspection & Testing Exam

60 Qs

603/2625/6 On-Screen Exam Questions

EAL Qualification Specification, Issue 5

61.5%

603/2625/6 Pass Mark

EAL Qualification Specification, Issue 5

0.8

Zs Temperature Factor

IET Guidance Note 3

EAL's Level 3 Inspection & Testing awards (600/4337/4, 600/4338/6, and the combined 603/2625/6) validate competence under BS 7671:2018+A4:2026 and IET Guidance Note 3 for initial verification and periodic inspection of UK electrical installations. This is an English-language MCQ study adaptation for the official assessment; it does not replace required practical, oral, written, or hands-on performance.

Sample EAL Level 3 Inspection & Testing Practice Questions

Try these sample questions to review concepts for the EAL Level 3 Inspection & Testing exam. Each question includes a detailed explanation. Start the interactive quiz above for the full 100+ question experience with AI tutoring.

1Which UK statutory regulation primary places a legal duty on employers, self-employed persons, and employees to ensure electrical systems are designed, constructed, maintained, and tested safely?
A.BS 7671:2018+A2:2022 (The IET Wiring Regulations)
B.The Electricity at Work Regulations 1989 (EAWR)
C.The Management of Health and Safety at Work Regulations 1999
D.The Provision and Use of Work Equipment Regulations 1998 (PUWER)
Explanation: The Electricity at Work Regulations 1989 (EAWR) is statutory legislation under UK law. Regulation 4 requires all electrical systems to be constructed and maintained to prevent danger. BS 7671 is a non-statutory British Standard, although compliance with BS 7671 is recognized as a primary method of proving compliance with EAWR 1989.
2According to BS 7671, what is the primary purpose of Initial Verification on a new electrical installation?
A.To assess whether an existing installation requires immediate re-wiring or repair
B.To verify that the installation has been designed, constructed, and tested in accordance with BS 7671 prior to being put into service
C.To provide a commercial energy efficiency rating for the property owner
D.To test the mechanical integrity of structural cable tray supports under full thermal load
Explanation: Initial Verification (Chapter 64 of BS 7671) is carried out during and upon completion of a new installation, addition, or alteration to verify that the requirements of BS 7671 have been met and that the installation is safe to be energized and placed into service.
3Under BS 7671 Regulation 643.1, in what sequence must inspection and testing be conducted during Initial Verification?
A.Live testing must precede dead testing to confirm supply polarity first.
B.Inspection must precede testing, and dead testing must precede energization for live testing.
C.Testing must be performed before visual inspection to avoid disturbing installed components.
D.Insulation resistance testing must always be performed after earth fault loop impedance testing.
Explanation: BS 7671 Regulation 643.1 requires visual inspection to precede testing. Furthermore, dead tests (continuity, insulation resistance, polarity) must be completed satisfactorily before the supply is energized to perform live tests (earth fault loop impedance, RCD operation).
4Under BS 7671, what maximum disconnection time is specified for a 230V final circuit not exceeding 32A in a TN system?
A.0.1 seconds
B.0.4 seconds
C.1.0 seconds
D.5.0 seconds
Explanation: BS 7671 Table 41.1 specifies a maximum automatic disconnection time of 0.4 seconds for final circuits not exceeding 32A supplying 230V protective earthing systems (TN systems). For TT systems, the maximum disconnection time for final circuits up to 32A is 0.2 seconds.
5In a TT earthing system, what protective device is generally required to achieve automatic disconnection of supply for final circuits due to high earth fault loop impedance?
A.Type B Miniature Circuit Breaker (MCB)
B.Residual Current Device (RCD)
C.High Rupturing Capacity (HRC) Fuse
D.Semi-enclosed rewireable fuse (BS 3036)
Explanation: In TT systems, earth fault loop impedance (Ze) is typically high (often 20 Ω to 200 Ω) because the earth fault return path is through the general mass of Earth. Overcurrent devices (MCBs/fuses) cannot provide rapid disconnection. An RCD is required to operate on low residual fault currents (RA x IΔn <= 50V).
6Which earthing system uses a combined neutral and protective conductor (PEN) throughout the supply distribution system up to the consumer unit main terminals?
A.TN-S system
B.TN-C-S (PME) system
C.TT system
D.IT system
Explanation: The TN-C-S system (also known as Protective Multiple Earthing or PME) uses a combined neutral and protective earth conductor (PEN conductor) from the supply transformer to the consumer's intake, where it is separated into distinct Neutral and Earth conductors at the main earthing terminal.
7What is the minimum cross-sectional area required for a copper main protective bonding conductor in an installation connected to a TN-C-S (PME) supply with a neutral supply conductor of 25mm²?
A.4mm²
B.6mm²
C.10mm²
D.16mm²
Explanation: Under BS 7671 Table 54.8, for a PME (TN-C-S) supply with a copper neutral conductor up to 35mm², the main protective bonding conductor must have a minimum cross-sectional area of 10mm² copper.
8According to BS 7671 18th Edition Amendment 2, which type of RCD is generally restricted from being specified for general socket-outlet circuits where equipment containing electronic components is installed?
A.Type AC RCD
B.Type A RCD
C.Type F RCD
D.Type B RCD
Explanation: BS 7671:2018+A2:2022 Regulation 531.3.3 states that Type AC RCDs shall only be used to serve equipment where the load current contains no DC components (e.g. simple resistive heating or filament lighting). Type AC RCDs can blind when DC residual currents are present; therefore, Type A or Type F/B RCDs are specified for general power circuits.
9Under Regulation 411.3.3, additional protection by means of a 30mA RCD is mandatory for socket-outlets rated up to what maximum current in general commercial installations?
A.13A
B.20A
C.32A
D.63A
Explanation: BS 7671 18th Edition Amendment 2 Regulation 411.3.3 requires additional protection by an RCD with IΔn not exceeding 30mA for AC socket-outlets with a rated current not exceeding 32A in locations where they are liable to be used by ordinary persons.
10What IP rating is required as a minimum for accessible top surfaces of electrical enclosures containing live parts according to BS 7671?
A.IPXXA / IP1X
B.IPXXB / IP2X
C.IPXXC / IP3X
D.IPXXD / IP4X
Explanation: BS 7671 Regulation 416.2.2 specifies that top surfaces of enclosures that are readily accessible must provide a degree of protection of at least IPXXD or IP4X (protection against access with a 1mm diameter wire). Other accessible enclosure surfaces must meet at least IPXXB or IP2X (finger touch).

About the EAL Level 3 Inspection & Testing Exam

EAL offers this scope through three related Level 3 awards: 600/4337/4 (Initial Verification and Certification), 600/4338/6 (Periodic Inspection, Testing and Certification), and 603/2625/6 (the single combined Inspection, Testing, Certification and Reporting award). Together they certify electrician competence in safe isolation, initial verification of new installations, periodic inspection and testing of existing installations, and issuing BS 7671 certificates and EICR reports. This is an English-language MCQ study adaptation for the official assessment; it does not replace required practical, oral, written, or hands-on performance.

Exam sponsor: EAL (Excellence, Achievement & Learning Ltd). The requirements and fees below concern the certification or admission exam, separate from our free practice resources.

Questions

60 questions

Time Limit

120 minutes

Passing Score

Pass/Fail (notionally 60%; the exact on-screen exam pass mark varies: 62% for 600/4337/4, 61.5% for 603/2625/6, 63%/62.5% for the 600/4338/6 bridging and QCR/001 exams)

Exam / Certification Fees

£47 (600/4337/4), £50 (600/4338/6), or £89 (603/2625/6) — EAL's listed qualification price; training-course tuition is set separately by each approved centre

Exam sponsor website

Fees, eligibility, and exam policies can change. Confirm them with the exam sponsor before applying or paying.

Our practice resources: topics covered

We aim to reflect publicly available exam outlines and topic information in our study resources. Coverage, format, and difficulty may differ from the actual exam, and we cannot guarantee that every detail is accurate or current. Confirm exam requirements, fees, and policies with the official exam sponsor.

7%

Health and Safety

The health and safety requirements that apply when inspecting, testing and commissioning an electrical installation: EAWR 1989 statutory duties, the prove-test-prove safe isolation sequence, lock-off/secure isolation, and GS38-compliant test equipment.

21%

Requirements for Inspecting and Testing

General requirements for inspecting and testing electrical installations: the current edition of BS 7671 and IET Guidance Note 3, certification documents (EIC, MEIWC, Schedule of Inspections, Schedule of Test Results, signatories, departures), and EICR extent/agreed limitations.

20%

Safe Inspection

The requirements for the safe inspection of electrical installations: inspection before testing (Reg 642.1), enclosure IP ratings, concealed-cable safe zones, AFDD requirements, installation notices, and EICR classification coding (C1, C2, C3, FI).

52%

Safe Testing

The requirements for the safe testing of electrical installations: continuity (R1+R2, R2, ring r1/rn/r2), insulation resistance, polarity, Ze/Zs and the 0.8 factor, PFC/PSCC, RCD testing, phase sequence, functional testing, test-instrument requirements, and fault diagnosis.

Preparing for the EAL Level 3 Inspection & Testing Exam

What You Need to Know

  • Passing score: Pass/Fail (notionally 60%; the exact on-screen exam pass mark varies: 62% for 600/4337/4, 61.5% for 603/2625/6, 63%/62.5% for the 600/4338/6 bridging and QCR/001 exams)
  • Exam length: 60 questions
  • Time limit: 120 minutes
  • Exam / certification fees: £47 (600/4337/4), £50 (600/4338/6), or £89 (603/2625/6) — EAL's listed qualification price; training-course tuition is set separately by each approved centre Official sources

Using Our Practice Resources

  • Work through all 100 available questions
  • Review every answer and explanation
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  • Use our AI tutor for tough concepts

EAL Level 3 Inspection & Testing: Suggested Study Strategy

1Memorize the prove-test-prove safe isolation sequence, including checking the voltage indicator on a known live source or proving unit both before and after verifying isolation.
2Practice calculating Zs = Ze + (R1+R2) and applying the 0.8 factor (Zs measured <= 0.8 * Zs max table) across different MCB ratings and types (Type B, C, D).
3Understand the strict order of dead tests under GN3: Continuity of protective conductors, Continuity of ring final conductors, Insulation resistance, Polarity.

Frequently Asked Questions

What is the difference between EAL's Level 3 Inspection & Testing awards and City & Guilds 2391?

They are listed as acceptable alternatives, not identical courses. The EAS Qualifications Guide (June 2025, produced by TESP for the EAS Management Committee) lists EAL 603/2625/6 alongside City & Guilds 2391-52 in both its Initial Verification (Table A4.10) and Periodic Inspection (Table A4.11) tables, EAL 600/4337/4 alongside City & Guilds 2391-50, and EAL 600/4338/6 alongside City & Guilds 2391-51. Assessment format and item counts differ between awarding bodies.

Why is the 0.8 temperature correction factor applied to measured Zs values?

The maximum Zs values published in BS 7671 tables assume conductors are operating at their maximum operating temperature (e.g. 70°C). When testing an unenergized or lightly loaded circuit at ambient temperature (20°C), conductor resistance is lower. Multiplying the maximum table value by 0.8 ensures the circuit will disconnect safely when operating at full load and maximum temperature.

When should an Electrical Installation Condition Report (EICR) be given a Code C1 vs Code C2?

Code C1 indicates immediate danger (e.g., exposed live conductors accessible to touch or wrong polarity on a line conductor), requiring immediate warning and action. Code C2 indicates a potentially dangerous condition that requires urgent remedial action (e.g., absence of main earthing, or Zs exceeding maximum permitted limit preventing automatic disconnection).

Under BS 7671:2018+A4:2026, does an FI code make an EICR unsatisfactory?

No. Amendment 4:2026 changed the FI wording from 'further investigation required without delay' to 'further investigation is advised' and decoupled it from the outcome: only C1 or C2 observations make the overall assessment unsatisfactory, while C3 and FI are recorded in a separate part of the report. Under the withdrawn A2:2022+A3:2024 forms, an FI classification did make the report unsatisfactory.