CITB Electrical Safety

Question 1

What voltage is recommended for portable electrical tools on UK construction sites?

Accepted Answer

110V AC

Answer

230V AC

Answer

415V AC

Answer

24V DC

Question 2

What colour are 110V transformer leads typically on a UK construction site?

Accepted Answer

Yellow

Answer

Blue

Answer

Red

Answer

Black

Question 3

What device should be used with 230V equipment on a construction site to provide protection against electric shock?

Accepted Answer

Residual Current Device (RCD)

Answer

Fuse box

Answer

Standard circuit breaker

Answer

Step-down transformer

Question 4

What is the minimum safe approach distance from overhead power lines of unknown voltage?

Accepted Answer

6 metres

Answer

1 metre

Answer

3 metres

Answer

10 metres

Question 5

What is the first thing you should do if you find a damaged electrical cable on site?

Accepted Answer

Stop using it and report it to your supervisor immediately

Answer

Repair it with insulating tape

Answer

Continue working and report it at the end of the shift

Answer

Cover it with a warning cone and carry on working

Question 6

What should you do before using a portable electrical tool?

Accepted Answer

Visually inspect the cable, plug, and casing for damage

Answer

Run it at full power to check it works

Answer

Ensure it is connected to a 230V supply

Answer

Remove the RCD to prevent nuisance tripping

Question 7

Which regulation specifically covers the safe use of electrical systems and equipment in UK workplaces?

Accepted Answer

Electricity at Work Regulations 1989

Answer

COSHH Regulations 2002

Answer

Provision and Use of Work Equipment Regulations 1998

Answer

Manual Handling Operations Regulations 1992