Prerequisite Quiz - Domestic Electricity Basics

Which of the following is the main purpose of a fuse in a household electrical circuit?

• To increase the voltage

• To protect the circuit from excessive current

• To reduce the resistance

• To store electrical energy

What is the standard voltage supplied to homes in Great Britain?

• 110 V

• 230 V

• 400 V

• 12 V

Which of the following is a safety measure when using electrical appliances?

• Using wet hands to plug in devices

• Keeping appliances away from water

• Overloading sockets

• Using damaged cables

What is the unit of electrical current?

• Volt

• Ohm

• Ampere

• Watt

Which type of circuit allows electricity to flow through more than one path?

• Series circuit

• Parallel circuit

• Open circuit

• Short circuit

What does a circuit breaker do in a domestic electrical system?

• Increases the current

• Automatically switches off the circuit if there is a fault

• Stores electrical energy

• Reduces the voltage

Which wire in a British plug is coloured green and yellow?

• Live wire

• Neutral wire

• Earth wire

• Fuse wire

What is the main function of the earth wire in a plug?

• To supply current to the appliance

• To prevent electric shock by providing a path to the ground

• To increase resistance

• To reduce voltage

Which household appliance converts electrical energy into heat energy?

• Television

• Electric kettle

• Refrigerator

• Radio