Electrical Safety Quiz

1. Which of the following is NOT a hazard associated with electrical safety in the home?

• A. Damp conditions near electrical appliances
• B. Overheating cables due to overloading
• C. Using appliances with a higher power rating than necessary
• D. Damaged insulation on cables and plugs

2. In a mains circuit, which wire must a switch always be connected to?

• A. The neutral wire
• B. The earth wire
• C. The live wire
• D. Any of the three wires

3. What is the primary function of a fuse in an electrical circuit?

• A. To prevent the neutral wire from becoming live
• B. To protect the circuit and cabling by breaking the circuit if current becomes excessive
• C. To earth the appliance and prevent electric shock
• D. To reduce the voltage supplied to the appliance

4. A double-insulated appliance does not require an earth wire. Explain why a fuse is still necessary in the circuit supplying a double-insulated appliance.

• A. The fuse provides an alternative path to earth in case of a fault
• B. The fuse protects the circuit and cabling from excess current, even though the appliance itself does not need earthing
• C. The fuse ensures that the neutral wire remains safe
• D. The fuse allows the appliance to function at higher power levels

5. A homeowner needs to choose between a fuse rated at 3 A and one rated at 13 A for an appliance with a power rating of 2400 W at 230 V. Which fuse should be selected and why?

• A. The 13 A fuse, because it provides greater protection for high-power appliances
• B. The 3 A fuse, because the calculated current is approximately 10 A, so a 3 A fuse would be appropriate
• C. The 3 A fuse, because the calculated current is approximately 10.4 A, and a fuse should be rated slightly above the normal operating current
• D. Neither fuse is suitable; a fuse rated at 10 A should be used instead