Exams / HS&E MAP / Electrical safety / Question 3
HS&E MAP practice question: Electrical safety (3 of 4)
C. General safety A free question from our original HS&E MAP practice exam. Try it, then open the answer to see why each option is right or wrong.
Last verified against HSE guidance and the law ·How we write our questions
A worker says the RCD on their extension lead means they don't need to check the tool's cable.
What does HSE say?
Choose one answer.
- AA. RCDs only work on 110 volt supplies
- BB. An RCD is only a back-up
- CC. The RCD makes any damage safe
- DD. RCDs don't need testing
Show the answer and explanation
Answer: B
- A. Wrong: Wrong. RCDs are used on 230 volt supplies as a back-up.
- B. Right: Right. HSE says an RCD is a secondary safeguard. Tools, plugs and cables still need checking.
- C. Wrong: Wrong. A damaged cable can still cause a shock or fire.
- D. Wrong: Wrong. Test plug-in or socket RCDs with the test button before use.
Explanation
RCDs are a back-up, not a replacement for checking equipment. Test them before use.
Study
Keep practicing
Answer questions with a score at the end, or practice just this topic with the explanation after each one. No sign-up needed.