Snapquiz - Household Electrical Safety

This is the Snapquiz on Household Electrical Safety. Click here or use the embedded video if you haven't watched the lesson yet.


Question 1. Which pin in a UK plug should connect to the blue wire?

Top centre.
Bottom left.
Any - it doesn't matter.
Bottom right.


Question 2. If an appliance draws a 4A current which standard fuse value (for the UK) should be used in its plug?

4A.
13A.
5A.
3A.


Question 3. Why might an appliance not need to use the earth wire?

It uses an AC supply.
It only needs a 3A fuse.
It's double-insulated (non-conductive body) and low power.
It would cost more to use an earth connection.


Question 4. What is the normal potential difference of the neutral wire?

230V.
50Hz.
110V.
0V.


Question 5. How does an RCCB protect us?

It compares the live and neutral currents and triggers if they're different.
It compares the live and earth currents and triggers if they're the same.
It compares the live and neutral currents and triggers if they're the same.
It compares the live and earth currents and triggers if they're different.


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