Free mock exam
Safe Isolation — AM2 Online Knowledge Test Practice
Free topic-focused mock exam: all 25 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
- 25
- Time limit
- 35 min
- Pass mark
- 70% · 18/25
- Question bank
- 25
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 of steps for safely isolating a circuit before work begins?
- 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, inform, isolate and lock off with a notice, prove the indicator, test all combinations, re-prove
Why: NET’s six steps: identify the point of isolation; inform the customer you are isolating; operate the isolator, lock it off and fit a warning notice (key kept on you); select an approved tester and prove it; test all combinations on the outgoing side of the isolator; re-prove the tester. Proving dead before isolating, or isolating before identifying the circuit, proves nothing.
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, 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.