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Know electrical safety requirement when working in the building services industry

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2 Health and Safety Quiz on Know electrical safety requirement when working in the building services industry, created by Vito Martino on 30/10/2014.
Vito Martino
Quiz by Vito Martino, updated more than 1 year ago More Less
Vito Martino
Created by Vito Martino over 9 years ago
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Resource summary

Question 1

Question
The colour and voltage to be used for powertools on a construction sites is?
Answer
  • Blue = 400V
  • Red = 230 V
  • Yellow = 110 V
  • d White = 25 V

Question 2

Question
The safe use of electricity on site is covered by which Regulation?
Answer
  • Electricity at Work Regulations 1988
  • Electricity at Work Regulations 1989
  • Electricity at Work Regulations 1990
  • Electricity at Work Regulations 1991

Question 3

Question
Electricity on site is normally at a reduced voltage, which reduced voltage is found on site?
Answer
  • 24 Volts.
  • 110 Volts.
  • 400 Volts.
  • 230 Volts

Question 4

Question
When carrying out electricity site safety on tools, checks are carried out on all of the following except which one?
Answer
  • Check the supply frequency.
  • Check that RCD protection is provided where necessary.
  • Check for current PAT labels.
  • Power tools should be double insulated.

Question 5

Question
Which of the following is a necessary check before using electrical equipment?
Answer
  • 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

Question 6

Question
To check a circuit is isolated and safe to work on you must?
Answer
  • 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

Question 7

Question
To check a circuit is isolated and safe to work on you should?
Answer
  • Get somebody else to check it
  • Check it with a home made lamp and flex
  • Wet your finger and 'flash' test the conductor.
  • Check with a GS38 voltage indicator

Question 8

Question
The ABC of resuscitation stands for?
Answer
  • Accident, Bleeding, Causality
  • Airways, Breathing, Circulation
  • Accident, Breathing, Causality
  • Airways, Breaks, Circulation

Question 9

Question
The first action you should think of in the event of an electric shock to a colleague is?
Answer
  • Isolate the supply.
  • Remove the plug.
  • Check for your own safety.
  • Get help.

Question 10

Question
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?
Answer
  • Use a piece of metal trunking
  • Use a wooden broom handle.
  • Use your bare hands.
  • Use a piece of metal conduit.

Question 11

Question
How would it be best to check the casualty's response if they were unconscious?
Answer
  • 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.

Question 12

Question
If the casualty was unconscious and lying on the floor what should you check for next?
Answer
  • Breathing
  • Bleeding.
  • Pulse.
  • Colour of skin.

Question 13

Question
What is the correct immediate treatment for a burn?
Answer
  • Treat for shock.
  • Flood the burn with cold water.
  • Check for pulse.
  • Remove clothing.

Question 14

Question
An electrical installation need to be isolated from the supply before carrying out work on the installation in order to prevent
Answer
  • damage to cables and components
  • interruption of the local supply system
  • possible electric shock
  • damage to appliances

Question 15

Question
The first action to be taken if a person is found lying unconscious on the floor after receiving an electric shock is to:
Answer
  • check for broken bones
  • telephone for assistance
  • check for pulse and breathing
  • check for cuts and bleeding

Question 16

Question
In accordance with the Electricity at Work regulations, when considering whether to work live a responsible person should:
Answer
  • do as the client demands
  • only work live
  • only work dead
  • carry out a risk assessment

Question 17

Question
Test instruments used for working on electrical systems should:
Answer
  • have insulated test probes
  • have non-insulated test probes
  • be less than 10 years old
  • be yellow in colour

Question 18

Question
Under the Electricity at Work Regulations, live working is considered:
Answer
  • never to be allowed
  • only to be allowed in exceptional circumstances
  • to be normally permitted
  • as entirely acceptable

Question 19

Question
To prove a circuit or equipment is dead after isolation what is the FIRST activity in the sequence of events?
Answer
  • 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

Question 20

Question
The nominal single phase voltage in the UK is?
Answer
  • 400 volts
  • 415 volts
  • 240 volts
  • 230 volts

Question 21

Question
When is live working permissible?
Answer
  • 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

Question 22

Question
Which of the following is not a requirement of low voltage safe isolation practice?
Answer
  • 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

Question 23

Question
The specific effects on the human body of a major electric shock are one of the following:
Answer
  • broken bones
  • chest pains
  • burns and cardiac arrest
  • dermatitis

Question 24

Question
The lowest level of electrical current which can harm the human body is normally measured in:
Answer
  • microamps
  • kiloamps
  • amps
  • milliamps

Question 25

Question
Where mains voltage is used to supply portable equipment on a construction site, what additional protection is required?
Answer
  • Cable avoidance tool
  • Residual current device (RCD)
  • Step-down generator
  • Step-down transformer

Question 26

Question
What colour cable USUALLY signifies 110 volt power supply on site?
Answer
  • Yellow
  • Blue
  • Red
  • Black

Question 27

Question
A portable electric generator on site has two power outlets, 110 volts and 230 volts. What colour would the 110 volt outlet be?
Answer
  • Red
  • Blue
  • Yellow
  • Black

Question 28

Question
The maximum AC voltage which the human body can withstand without long term physiological effects in dry conditions is:
Answer
  • 230 volts
  • 400 volts
  • 50 volts
  • 110 volts

Question 29

Question
Which of the following statements is true with regard to the dangers of electricity?
Answer
  • 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

Question 30

Question
What is the most serious effect that electric shock can have if you come into contact with a live part?
Answer
  • 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

Question 31

Question
Your job involves you working near to hanging electrical cables which have bare ends. What should you do?
Answer
  • 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

Question 32

Question
For all live working activities it is necessary to:
Answer
  • keep your fingers crossed
  • be accompanied
  • wear rubber gloves only
  • carry out a risk assessment as required by the EAW Regulations.

Question 33

Question
The probes of voltage detectors and test instruments used on electrical systems should be:
Answer
  • coloured red
  • shaped or have barriers to prevent finger contact with the tips
  • accompanied by a calibration certificate
  • manufactured in the UK

Question 34

Question
which of the following should be used to prove a circuit or equipment is dead after isolation?
Answer
  • A voltage stick
  • A multimeter
  • A proprietary test lamp or two-pole voltage detector
  • A lamp holder with a length of flex attached

Question 35

Question
What is the recommended maximum voltage for portable hand lamps when working in confined or damp locations?
Answer
  • 400 volts
  • 230 volts
  • 110 volts
  • 50 volts
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