Free mock exam
Safe Isolation — AM2 Online Knowledge Test Practice
Free topic-focused mock exam: all 20 questions on Safe Isolation, 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
- 20
- Time limit
- 35 min
- Pass mark
- 70% · 14/20
- Question bank
- 20
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 correct sequence for safe isolation according to GS38?
- AProve dead, isolate, secure, identify circuit, then apply labels
- BIdentify circuit, prove dead, isolate, secure, then test the indicator
- CIsolate, prove dead, secure, identify circuit, then re-test indicator
- DIdentify circuit, isolate, secure, test voltage indicator, prove dead, re-test indicator
Why: GS38 procedure: identify circuit, isolate, secure against re-energisation, test voltage indicator on known live source, prove circuit dead, re-test indicator on live source.
02Why must a voltage indicator be tested before and after proving dead?
- ATo record the readings on the test certificate
- BTo calibrate the indicator against the supply voltage
- CTo confirm the tester is working correctly and hasn't failed during use
- DTo discharge any stored energy in the indicator
Why: Testing before proves it works, testing after confirms it didn't fail during the proving dead test - this validates the dead reading.
03What is a proving unit used for?
- ADischarging capacitors before working on equipment
- BMeasuring the earth fault loop impedance of a circuit
- CLocating a hidden cable behind a wall
- DProviding a known voltage to test that the voltage indicator works
Why: A proving unit provides a known voltage source to test that voltage indicators are functioning correctly before and after use.
Common questions
Is the Safe Isolation 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.
