Free mock exam
Distribution Systems — Industrial Electrical Practice
Free topic-focused mock exam: all 15 questions on Distribution Systems, drawn from the wider Industrial Electrical 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
- 15
- Time limit
- 35 min
- Pass mark
- 70% · 11/15
- Question bank
- 15
Free, no sign-up. Retake as many times as you like — the questions are reshuffled, with the answer order changed.
Sample questions
01What is the standard three-phase voltage in UK industrial installations?
- A415V
- B400V
- C440V
- D230V
Why: UK three-phase industrial voltage is 400V line-to-line (230V line-to-neutral) since harmonisation.
02What does HV (High Voltage) typically refer to in UK industrial settings?
- AAbove 400V
- BAbove 11kV
- CAbove 230V
- DAbove 1000V AC
Why: High Voltage in the UK is defined as exceeding 1000V AC or 1500V DC.
03What is the purpose of a main LV switchboard in an industrial installation?
- ACorrecting the power factor of the installation
- BDistribution of power to sub-circuits
- CStepping the incoming HV supply down to 400V
- DSuppressing voltage transients on the supply
Why: The main LV switchboard receives incoming supply and distributes power to various sub-circuits throughout the facility.
Common questions
Is the Distribution Systems 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.
