CSCS Electrical Safety 3

Question 1

Which type of power tool is safest to use in wet conditions or confined spaces where electrical shock risk is highest?

Accepted Answer

Battery-powered or pneumatic tools

Answer

230V mains-powered tools with a long cable

Answer

110V tools connected to a step-down transformer

Answer

Any tool fitted with an RCD adapter

Question 2

How often should portable electrical equipment on a construction site be checked?

Accepted Answer

Before each use by the operator and at formal intervals for PAT testing

Answer

Once every 12 months only

Answer

Only when the equipment appears to be faulty

Answer

Every five years in line with major service schedules

Question 3

What is the purpose of a 'permit to work' system in relation to electrical work on site?

Accepted Answer

To formally control high-risk electrical work and ensure equipment is safely isolated before work begins

Answer

To allow any worker to carry out electrical repairs without supervision

Answer

To record the results of routine PAT testing

Answer

To authorize the purchase of electrical equipment from approved suppliers

Question 4

What does 'safe isolation' of an electrical circuit mean before maintenance work begins?

Accepted Answer

Switching off the supply, locking off the isolator, and confirming the circuit is dead with a voltage indicator

Answer

Storing electrical tools in a locked cabinet

Answer

Moving electrical equipment to a safer area of the site

Answer

Wrapping exposed cable joints with insulation tape

Question 5

Under the Electricity at Work Regulations 1989, what is the employer's primary legal duty regarding electrical systems?

Accepted Answer

To ensure all electrical systems and equipment are constructed and maintained so as to prevent danger

Answer

To inspect all electrical systems once every ten years

Answer

To employ a full-time electrician on every construction site

Answer

To replace all electrical equipment that is more than five years old

Question 6

What is the correct immediate action if you witness a colleague receiving an electric shock?

Accepted Answer

Do not touch them; switch off the power supply first, then call for emergency help

Answer

Grab the person and pull them away from the equipment immediately

Answer

Throw water onto them to conduct the current away

Answer

Wait until they collapse before attempting to assist

Question 7

How is a 'competent person' for electrical work on a construction site best described?

Accepted Answer

A person with sufficient training, knowledge, and experience to prevent danger from electrical hazards

Answer

Any worker who has been on a construction site for more than five years

Answer

Any site manager who holds a valid CSCS card

Answer

A person who has completed the standard two-day site induction