In accordance with the Electricity at Work regulations, when considering whether to work live a responsible person should:
Carry out a risk assessment
The normal procedure for working on electrical equipment should be which one of the following?
Dead working
Test instruments used for working on electrical systems should:
Have insulated test probes
Under the Electricity at Work Regulations, live working is considered:
Only to be allowed in exceptional circumstances
Which of the following would you use to replace the fuse in a plug if fuses were NOT available?
None of the options listed
To prove a circuit or equipment is dead after isolation what is the FIRST activity in the sequence of events?
Check that the voltage detector is working on a proving
device, known live source or in built test feature
The nominal single phase voltage in the UK is?
230 volts
When is live working permissible?
When it is unreasonable in all circumstances for the
equipment to be made dead and suitable precautions
are taken
Which of the following is NOT a requirement of low voltage safe isolation practice?
The person carrying out the work is issued with
insulating gloves
The specific effects on the human body of a major electric shock are one of the following:
Burns and cardiac arrest
The lowest level of electrical current which can harm the human body is normally measured in:
Milliamps
With regard to the effect of electrical current on the human body, one of the following is correct:
A 30 mA Residual Current Device (RCD) should prevent
a person receiving a fatal electric shock
Where mains voltage is used to supply portable equipment on a construction site, what additional protection is required?
Residual current device (RCD)
What colour cable USUALLY signifies 110 volt power supply on site?
Yellow
A portable electric generator on site has two power outlets, 110 volts and 230 volts. What colour would the 110 volt
outlet be?
Yellow
Where there is no local means of isolation for equipment or circuits to be worked on, which of the following is the
preferred method of isolation?
Use a suitable device such as a circuit breaker
What action should you take if a workmate gets an electric shock?
Cut off the power and call for help
A residual current device is designed to operate in the event of one of the following:
Earth fault
Electrical installations on construction sites should be periodically inspected and tested:
Every 3 months
The maximum AC voltage which the human body can withstand without long term physiological effects in dry conditions is:
50 volts
Which of the following statements is true with regard to the dangers of electricity?
Electricity is dangerous at any time because you cannot
tell by looking at a cable whether or not it is live
What is the most serious effect that electric shock can have if you come into contact with a live part?
The electric current can cause the heart to stop,
resulting in death
Your job involves you working near to hanging electrical cables which have bare ends. What should you do?
Inform your supervisor and keep well away
For all live working activities it is necessary to:
Carry out a risk assessment as required by the EAW
Regulations.
