2391 Inspection & Testing Pro

Pass the City & Guilds 2391-52 with 556 exam-standard questions, real exam-format mock tests, and the field tools you will actually use on site.

Built against BS 7671:2018+A4:2026 Part 6 (Inspection and Testing).

EXAM PREP — OPEN BOOK & CLOSED BOOK
The 2391-52 is sat in two parts, so the question bank is organised the same way. Work through the full open-book syllabus, then switch to Closed Book to drill the topics you must know without the regs in front of you.

• Initial Verification — 132 questions
• Periodic Inspection — 133 questions
• Test Procedures — 78 questions
• Certification and Reporting — 63 questions
• Fault Coding — 67 questions
• Safe Isolation and GS38 — 47 questions
• Statutory Requirements — 36 questions

Every question carries a worked explanation, and diagrams are drawn to scale for test sequences, schedules and certificate extracts.

MOCK TEST THAT MATCHES THE REAL THING
60 questions in 120 minutes, weighted across topics exactly as the real 2391-52 paper is. Questions and answer options are shuffled on every attempt, so you learn the subject rather than the position of the right answer.

SEVEN ON-SITE CALCULATORS
• Max Zs — 0.8 x tabulated rule of thumb
• R1+R2 — predict the continuity reading before you measure it
• Zs from Components — Ze + (R1+R2), checked against the tabulated limit
• Prospective Fault Current — the Ipf figure the certificate asks for
• Ring Final — (r1+r2)/4 continuity check
• Adiabatic — S = the square root of (I squared x t) / k
• Voltage Drop — mV/A/m x Ib x L

QUICK REFERENCE
26 reference cards across test and limiting values, classification and reporting, safe isolation and GS38, test sequence and procedure, and wiring identification and colours. Bookmark the ones you keep coming back to.

FIELD TOOLS
• Digital Certificates — build EIC, Minor Works and EICR / Condition Reports, then export a clean PDF
• Visual Inspection — full Schedule of Inspection, tickable on site
• Dead Testing and Live Testing — Schedule of Test Results, step by step
• EICR Coding Guide — C1, C2, C3 and FI, with the reasoning behind each
• Fault Coding Trainer — classify real EICR observations and check yourself against the correct code

ALSO INCLUDED
• Flash cards for rapid revision
• Voice-over in UK English, so you can revise hands-free
• Progress history and per-topic scoring to show where you are weak
• Choose 1 to 100 questions per practice session
• Exam date reminders

Free to start. A subscription unlocks the full 556-question bank, unlimited mock exams, all calculators and Quick Reference, the fault coding trainer, and certificate export.

Subscriptions renew automatically unless cancelled at least 24 hours before the end of the current period. Manage or cancel in your Google Play account settings.

This is an independent exam-preparation app and is not affiliated with or endorsed by City & Guilds or the IET.

Source link for the statutory material referenced: https://www.legislation.gov.uk/uksi/1989/635/contents

Recent changes:
Lifetime Access: one payment unlocks everything, forever. Pick it beneath the subscription plans on the upgrade screen.

Also in this update: clearer flash card buttons, read-aloud uses a voice that matches the app language, help search results stay visible above the keyboard, and the upgrade screen closes once your purchase goes through, plus reliability fixes.