Free mock exam
Fault finding — Industrial Electrical Practice
Free topic-focused mock exam: all 30 questions on Fault finding, 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
- 30
- Time limit
- 35 min
- Pass mark
- 70% · 21/30
- Question bank
- 30
Free, no sign-up. Retake as many times as you like — the questions are reshuffled, with the answer order changed.
Sample questions
01You have isolated a pump starter at its isolator and fitted your own lock. Which EAWR regulation is about making sure it cannot become charged again while you work on it?
- ARegulation 13, keeping it dead for work
- BRegulation 14, the live work conditions
- CRegulation 12, the means of isolation
- DRegulation 16, competence for the work
Why: Regulation 13 requires adequate precautions so that equipment made dead for work cannot become charged during that work, which in practice means a locked-off isolator with your own lock and key. Regulation 12 is tempting because you have just used the isolator, but it is about there being a suitable means of cutting off the supply and isolating. Regulation 14 covers live work, and regulation 16 covers knowledge, experience and supervision.
02A live test in a control panel has been justified. HSG85 says you will usually need a second person with you. What is that person there to do?
- ASign a live-work permit before the panel opens
- BSwitch off, make the system safe and help you
- CHold the test probes while you read the meter
- DKeep production updated on how the job is going
Why: HSG85 says justified live work will usually need an accompanying person who can switch off, make the system safe and give help. Holding the probes is tempting, but it puts a second pair of hands near live parts and is not what accompaniment is for. A signature on a form does not stop anyone being hurt, and keeping production informed does nothing for your safety.
03You have locked off the main isolator of a packaging machine panel. The drawing shows the PLC is also fed from a UPS fitted inside the panel. What do you do before treating the panel as dead?
- AIsolate the UPS output too, then prove dead at the point of work
- BRely on the main isolator, as a UPS only feeds the PLC logic side
- CProve dead at the main isolator’s outgoing terminals, then start
- DSwitch the PLC to stop mode, as that removes the UPS supply too
Why: Industrial panels often have more than one source, and a UPS feeding a PLC is a common example. Every source has to be found and isolated, then the parts you will touch proved dead at the point of work. Proving dead at the isolator’s outgoing terminals is tempting, but it only proves that one supply. Stop mode halts the program; it does not remove any supply.
Common questions
Is the Fault finding mock exam free?
Yes, it is free with 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 as a qualification?
No. This is independent practice material and does not award a qualification, card or certificate. Where a subject has a formal qualification or card, you gain it through an approved provider.