Safe Isolation Quiz

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Quiz Questions

1.
How many fatalities due to accidents at work are attributed to electricity between 2017/18 and 2021/22 (including employed and self-employed workers)?
- A.
  37
- B.
  112
- C.
  83
- D.
  51
2.
In accordance with the Health and Safety At Work Act 1974 and the Health and Safety Executive, who could face prosecution or imprisonment due to accidents or fatalities at work? Select all that apply.
- A.
  Directors, whether directly carrying out the work or not
- B.
  Managers, whether directly carrying out the work or not
- C.
  Employees, whether directly carrying out the work or not
- D.
  The person carrying out the work, whether an employee or a contractor
3.
When isolating a system safely, what is the first thing that you should do?
- A.
  Carry out a risk assessment and produce a Method Statement
- B.
  Lock off the circuit with a padlock and unique key
- C.
  Gain permission and permits from the duty holder and authorised person(s)
- D.
  Prove that the circuit and equipment are functioning – or test that they are dead
4.
When carrying out work on a circuit, how can you remain safe and be certain that the circuit is not live?
- A.
  Check the labelling on site and use a multimeter or voltmeter to prove dead
- B.
  Use a voltage indicator and proving unit to prove dead
- C.
  Use a known live source to test the voltage indicator in order to prove dead
- D.
  Ensure that the duty holder and authorised person(s) have confirmed that the circuit is dead
5.
What is the purpose of a proving unit?
- A.
  It proves that the mains supply is live and that power is reaching the equipment or system
- B.
  It proves that the system’s voltage is within a specific range
- C.
  It proves that your voltage indicator is functioning correctly
- D.
  It proves that activity is taking place in line with Health and Safety requirements
6.
Before using it on a live supply, what should you do with a voltage indicator unit? Select all that apply.
- A.
  It should be labelled to ensure others know who is working on the circuit
- B.
  It should be serviced to ensure that it is not faulty
- C.
  It should be tested on another supply
- D.
  It should be proved with a proving unit or known source
7.
Once the point of isolation has been identified, what should you do?
- A.
  Turn the equipment off and place a warning label on it with additional notices nearby, if appropriate
- B.
  Inform the duty holder and authorised person(s) that the equipment is out of bounds and place a warning label on it with additional notices nearby, if appropriate
- C.
  Fit a locking off device and padlock on the circuit, with a completed warning label on it and additional notices nearby, if appropriate
- D.
  Fit a locking off device and warning label to the circuit and notify the duty holder and authorised person(s)
8.
When using locking off devices with padlock(s), what should you do with the keys?
- A.
  Ensure that they are in a convenient location for other workers to be able to access the system at a later date
- B.
  Ensure that there is one nominated person in charge of the key
- C.
  Ensure that each person carrying out work has their own padlock and retains their own unique key
- D.
  Ensure that you keep the key safe and that the system is labelled appropriately for others to see
9.
How can you test that all LEDs on all ranges on your proving device are working correctly?
- A.
  Use a dedicated proving unit that complies with GS38
- B.
  Use any known live source
- C.
  Use a suitable proving unit with a matched GS38-compliant voltage indicator.
- D.
  Use a mains source that is located close to where you are working
10.
Once no voltage is detected and the circuit is dead you should:
- A.
  Commence work as the circuit is dead
- B.
  Re-test the voltage indicator using a known live source
- C.
  Re-test the voltage indicator using a proving unit
- D.
  Use a multimeter to re-confirm that the circuit is dead
11.
If you move away from the circuit or equipment for any period of time, what is the first thing that you should do before re-commencing work on the system?
- A.
  Check that another employee or contractor has not placed any warning labels on the equipment or circuit
- B.
  Carry out a visual inspection to confirm that no one has touched the system and that isolated switches remain in the “OFF” position
- C.
  Confirm that the circuit or equipment is dead using a voltmeter or multimeter
- D.
  Re-test and re-prove the voltage indicator using a proving unit
12.
Before re-energising a system and restoring power, what do you need to do? Select the correct order.
- A.
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  Answer A
- B.
  Image Source
  Answer B
- C.
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  Answer C
13.
When selecting a matched voltage indicator and proving device, why is it important to select the right product? Select all that apply.
- A.
  To ensure compliance with BS EN 61010
- B.
  To ensure that you have your equipment is properly rated for the application and that you avoid dangerous mismatches between supply and proving voltage
- C.
  To avoid risks associated with hazardous transient impulses from the mains supply
- D.
  To ensure that testers, leads and accessories all have safety ratings equivalent to, or higher than, the overvoltage category and voltage rating in order for the location to be safe
14.
You've re-tested the voltage indicator using a proving unit and found that it’s not working correctly, what do you do next?
- A.
  Use a multimeter to crosscheck
- B.
  Find another known live source nearby
- C.
  Select another GS38-compliant voltage indicator and prove it works correctly with a proving unit
- D.
  Advise the duty holder and authorised person(s) that work on the system cannot proceed
15.
After gaining permission from the duty holder or authorised person(s), if you test for dangerous voltages on any circuit to be worked on, whether single or three-phase, and the circuit is not dead, what do you do next:
- A.
  Re-test the circuit once more for dangerous voltages
- B.
  Identify the point of isolation, isolate, lock off and place warning tags on the system
- C.
  Re-prove the voltage indicator
16.
What is the correct order for the following process actions?
- A.
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  Answer A
- B.
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  Answer B
- C.
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  Answer C
17.
In Martindale’s streamlined 5 vital step approach to safe isolation, that must be carried out to prevent loss of life, which step occurs first?
- A.
  Ensure - Prove and re-test the VI against the proving unit to ensure it is functioning before working on the circuit.
- B.
  Approved kit – Make sure your equipment meets all legal safety standards (BS EN61243-3).
- C.
  Initial prove - Test your Voltage Indicator (VI) against the proving unit to make sure it is working properly.
- D.
  Lock out - Identify the point of isolation, lock it off and place warning tags onto the equipment.
- E.
  Voltage test - Use your VI to confirm dangerous voltage levels are not in the circuit you are about to work on.

Quiz Outcomes

1.
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2.
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3.
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4.
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Safe Isolation Quiz

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Quiz Questions

Quiz Outcomes