CITB Electrical Safety 3

Question 1

What is the most common cause of fatal electrocution on UK construction sites?

Accepted Answer

Contact with overhead power lines

Answer

Contact with overhead power lines is the most frequent cause of fatal electrocution on UK construction sites, particularly involving plant, equipment, and scaffolding.

Question 2

What is the purpose of a 'goal post' structure erected on a construction site?

Accepted Answer

To warn vehicle drivers of height restrictions near overhead power lines

Answer

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.

Question 3

What is particularly important regarding electrical safety when working in wet conditions?

Accepted Answer

Use equipment rated for wet conditions and ensure RCDs are always in circuit

Answer

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.

Question 4

Who should carry out electrical installation, testing, and repair work on a construction site?

Accepted Answer

A competent and qualified electrician

Answer

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.

Question 5

What should you do if a colleague receives an electric shock and is still in contact with the live electrical source?

Accepted Answer

Switch off the power supply before touching them, or use a non-conductive object to separate them from the source

Answer

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.

CITB HS&E Operatives Practice Test

CITB HS&E Operatives Practice Test

CITB Electrical Safety 3