1) Roughly how many people die from electrical shock or burns at work each year? a) 0 b) 50 c) 20 d) 100 2) What does isolation mean? a) Your boss leaving you to work on your own b) Cutting off part/all of the installation from the supply c) Turning on all switches d) Removing the circuit breaker 3) What is the first step in the isolation procedure ? a) Lock-off b) Test for ‘dead’ c) Identify the correct isolation point/device 4) When you lock off, the lock must have a unique key or code. a) True b) False 5) What must a voltage detector comply with? a) GA01 b) GS38 c) SG83 d) 10AG 6) When you test for ‘dead’ and voltage is present, you should… a) Continue b) Give up and tell the customer you can’t fix it c) Re-Check Isolation d) Isolate the circuit 7) How many possible tests are there during three-phase isolation? a) 3 b) 8 c) 10 d) 12 8) Currents greater than 75 mA cause… a) Only muscle paralysis b) Just a slight tingle c) Rapid, ineffective heartbeat d) Shortness of breath 9) What is the final step in the isolation procedure? a) Ensure your voltage indicator still works b) Ask for payment c) Make sure you had permission to switch off d) Open the circuit 10) Which of the below is NOT necessary for isolation? a) Voltage indicator only b) Warning Notices and PPE c) Lock/multi-lock system only d) A colleague stood by the supply unit at all times

Safe Isolation

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