The colour and voltage to be used for powertools on a construction sites is?
Blue = 400V
Red = 230 V
Yellow = 110 V
d White = 25 V
The safe use of electricity on site is covered by which Regulation?
Electricity at Work Regulations 1988
Electricity at Work Regulations 1989
Electricity at Work Regulations 1990
Electricity at Work Regulations 1991
Electricity on site is normally at a reduced voltage, which reduced voltage is found on site?
When carrying out electricity site safety on tools, checks are carried out on all of the following except which one?
Check the supply frequency.
Check that RCD protection is provided where necessary.
Check for current PAT labels.
Power tools should be double insulated.
Which of the following is a necessary check before using electrical equipment?
Check the tool is the correct colour
Check the cable is not frayed or damaged
Ensure the flex is brown
Check the brand of the tool
To check a circuit is isolated and safe to work on you must?
Check with a reliable voltage indicator
Wet your finger and 'flash' test the conductor.
Check it with a home made lamp and flex
Get somebody else to check it
To check a circuit is isolated and safe to work on you should?
Check with a GS38 voltage indicator
The ABC of resuscitation stands for?
Accident, Bleeding, Causality
Airways, Breathing, Circulation
Accident, Breathing, Causality
Airways, Breaks, Circulation
The first action you should think of in the event of an electric shock to a colleague is?
Isolate the supply.
Remove the plug.
Check for your own safety.
If the casualty is currently suffering from an electric shock and you can not break the electrical supply by pulling a plug or switching off a supply what would be a good material for breaking the contact between casualty and supply?
Use a piece of metal trunking
Use a wooden broom handle.
Use your bare hands.
Use a piece of metal conduit.
How would it be best to check the casualty's response if they were unconscious?
Pinch them hard on the arm.
Slap them hard on the face.
Talk to them and gently shake the casualty.
Ask somebody else if they knew their name.
If the casualty was unconscious and lying on the floor what should you check for next?
Colour of skin.
What is the correct immediate treatment for a burn?
Treat for shock.
Flood the burn with cold water.
Check for pulse.
An electrical installation need to be isolated from the supply before carrying out work on the installation in order to prevent
damage to cables and components
interruption of the local supply system
possible electric shock
damage to appliances
The first action to be taken if a person is found lying unconscious on the floor after receiving an electric shock is to:
check for broken bones
telephone for assistance
check for pulse and breathing
check for cuts and bleeding
In accordance with the Electricity at Work regulations, when considering whether to work live a responsible person should:
do as the client demands
only work live
only work dead
carry out a risk assessment
Test instruments used for working on electrical systems should:
have insulated test probes
have non-insulated test probes
be less than 10 years old
be yellow in colour
Under the Electricity at Work Regulations, live working is considered:
never to be allowed
only to be allowed in exceptional circumstances
to be normally permitted
as entirely acceptable
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
Check between line and neutral
Check between line and earth
Make sure equipment is not working
The nominal single phase voltage in the UK is?
When is live working permissible?
When the person carrying out the work is a competent person
When it is unreasonable in all circumstances for the equipment to be made dead and suitable precautions are taken
When the means of isolation cannot be identified
When the person working on the equipment is wearing rubber gloves
Which of the following is not a requirement of low voltage safe isolation practice?
The conductors are proved to be dead at the point of work
Ensuring that the correct point of isolation is identified
The person carrying out the work is issued with insulating gloves
A caution notice should be applied at the point of isolation
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:
Where mains voltage is used to supply portable equipment on a construction site, what additional protection is required?
Cable avoidance tool
Residual current device (RCD)
What colour cable USUALLY signifies 110 volt power supply on site?
A portable electric generator on site has two power outlets, 110 volts and 230 volts. What colour would the 110 volt outlet be?
The maximum AC voltage which the human body can withstand without long term physiological effects in dry conditions is:
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
Electricity is only dangerous in wet weather
Electricity is only dangerous if you are not wearing wellington boots
Electricity is perfectly safe so long as you wear cotton gloves
What is the most serious effect that electric shock can have if you come into contact with a live part?
electric current can cause the finger muscles to twitch
The electric current can cause the heart to stop, resulting in death
The electric current can cause burn marks on the fingers
The electric current can cause a slight tingling in the fingers
Your job involves you working near to hanging electrical cables which have bare ends. What should you do?
Attempt to push the cables back into the ceiling void so that you can start work
Inform your supervisor and keep well away
Carry on working, as there shouldn't be a problem
Touch the cables to see if they are live
For all live working activities it is necessary to:
keep your fingers crossed
wear rubber gloves only
carry out a risk assessment as required by the EAW Regulations.
The probes of voltage detectors and test instruments used on electrical systems should be:
shaped or have barriers to prevent finger contact with the tips
accompanied by a calibration certificate
manufactured in the UK
which of the following should be used to prove a circuit or equipment is dead after isolation?
A voltage stick
A proprietary test lamp or two-pole voltage detector
A lamp holder with a length of flex attached
What is the recommended maximum voltage for portable hand lamps when working in confined or damp locations?