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 wire is coloured brown?

Live.
Neutral.
Earth.
Mains.


Question 2. What is the normal potential difference of the neutral wire?

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


Question 3. How does an RCCB protect us?

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


Question 4. What is the earth wire connected to inside the appliance?

The metal case or body of the appliance.
The live components of the appliance.
The neutral power connection of the appliance.
The power switch of the appliance.


Question 5. How does a fuse protect us?

It predicts large currents, then disables the device.
It detects when a large current flows, switching off the power.
It melts when a large current flows, breaking the circuit.
It limits large currents, only allowing a set amount of current to flow.


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