Electrical Safety Flashcards
7 cards from real CITB practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Electrical Safety flashcards as text
What is the most common cause of fatal electrocution on UK construction sites?
Answer: Contact with overhead power lines
Contact with overhead power lines is the most frequent cause of fatal electrocution on UK construction sites, particularly involving plant, equipment, and scaffolding.
What is the purpose of a 'goal post' structure erected on a construction site?
Answer: To warn vehicle drivers of height restrictions near overhead power lines
Goal post structures are erected across access routes near overhead power lines to warn drivers of maximum height restrictions and prevent contact with the lines.
What is particularly important regarding electrical safety when working in wet conditions?
Answer: Use equipment rated for wet conditions and ensure RCDs are always in circuit
Water greatly increases the risk of electric shock, so all electrical equipment used in wet conditions must be rated as suitable and RCDs must always be in circuit.
Who should carry out electrical installation, testing, and repair work on a construction site?
Answer: A competent and qualified electrician
Electrical installation, testing, and repair must only be performed by a competent and qualified electrician to ensure safety and comply with the Electricity at Work Regulations 1989.
What should you do if a colleague receives an electric shock and is still in contact with the live electrical source?
Answer: Switch off the power supply before touching them, or use a non-conductive object to separate them from the source
Touching a person in contact with live electricity will cause you to receive a shock too — you must isolate the power first or use a non-conductive object to break contact.
What does 'dead working' mean in the context of electrical safety?
Answer: Working on electrical systems that have been safely isolated from the supply and proved dead
'Dead working' means carrying out work on electrical equipment that has been safely isolated from all sources of supply and tested to confirm it is de-energised.
How often should RCDs be tested on a construction site?
Answer: Daily, before use
RCDs should be tested every day before use by pressing the built-in test button to confirm they will operate correctly if a fault occurs.