Free mock exam
BS 7671 Selection & Erection — AM2 Online Knowledge Test Practice
Free topic-focused mock exam: 30 random questions from a pool of 48 on BS 7671 Selection & Erection, drawn from the wider AM2 Online Knowledge Test bank. 35-minute timer, 70% to pass, worked explanation on every question. Use this when you've taken the full mock once and want to drill the topics you got wrong.
- Questions
- 30
- Time limit
- 35 min
- Pass mark
- 70% · 21/30
- Question bank
- 48
Free, no sign-up. Retake as many times as you like — different questions each time.
Sample questions
01Which group of factors determines the current-carrying capacity of a cable?
- AThe supply voltage, the supply frequency and the type of earthing system
- BInstallation method, ambient temperature, grouping, thermal insulation
- CThe protective device type, and its breaking capacity at the board
- DConductor colour, the overall cable length and the number of cores fitted
Why: Current-carrying capacity depends on installation method (Appendix 4), ambient temperature (Ca), grouping (Cg), and thermal insulation (Ci).
02What is the minimum copper conductor cross-sectional area permitted for a lighting circuit?
- A1.0mm²
- B2.5mm²
- C0.5mm²
- D1.5mm²
Why: The minimum conductor size for lighting circuits is generally 1.0mm² for copper conductors.
03What is the minimum copper conductor cross-sectional area for a ring final circuit wired in thermoplastic twin-and-cpc cable?
- A1.0mm²
- B2.5mm²
- C4.0mm²
- D1.5mm²
Why: Ring final circuits are typically wired in 2.5mm² cable, protected by a 32A device.
Common questions
Is the BS 7671 Selection & Erection mock exam free?
Yes — 100% free, no sign-up needed. Questions are pulled at random from a substantial bank, with a worked explanation on every question after you submit.
Can I retake the mock exam?
Yes. Every attempt picks a different random selection and reshuffles the options, so each retake gives you genuinely new questions. No limit on retakes.
Does this count towards the real qualification?
No — this is independent practice material. To gain the actual qualification you need to sit the official assessment through an approved provider.
