Lighting Circuits Quiz

What are the typical cable sizes used for wiring domestic lighting circuits?

• 0.5mm² or 1.0mm²

• 1.0mm² or 1.5mm²

• 1.5mm² or 2.0mm²

• 2.0mm² or 2.5mm²

Answer explanation

The typical cable sizes for domestic lighting circuits are 1.0mm² or 1.5mm². These sizes are suitable for the current load and ensure safety and efficiency in lighting installations.

Which of the following is NOT mentioned as a requirement for lighting circuits?

• Earthing terminal

• CPC

• Light dimmer

• Protective devices

Answer explanation

The requirement for lighting circuits includes earthing terminal, CPC, and protective devices. A light dimmer, while useful, is not a mandatory requirement, making it the correct choice for what is NOT mentioned.

What is the function of a 5/6 amp protective device in lighting circuits?

• To increase voltage

• To protect the circuit

• To enhance brightness

• To reduce power consumption

Answer explanation

The function of a 5/6 amp protective device in lighting circuits is to protect the circuit from overloads and short circuits, ensuring safety and preventing damage to the electrical system.

What color is typically used for the neutral wire?

• Red

• Green

• Blue

• Yellow

Answer explanation

The neutral wire is typically represented by the color blue in electrical wiring. This color coding helps to identify the function of each wire, ensuring safety and proper connections.

Which wire connects directly to the lamp in the circuit?

• Line wire

• Neutral wire

• Switch wire

• Earth wire

Answer explanation

The switch wire connects directly to the lamp, allowing it to be turned on or off. The line wire provides power, the neutral wire completes the circuit, and the earth wire is for safety.

What is the function of the intermediate switch in a lighting circuit?

• To control the brightness

• To allow control from multiple locations

• To increase the voltage

• To decrease the current

Answer explanation

The intermediate switch allows control of the same light fixture from multiple locations, making it ideal for hallways or large rooms. This is why the correct answer is 'To allow control from multiple locations'.

What component is labeled as "Feed" in the diagram?

• The switch

• The lamp

• The cable

• The protective device

Answer explanation

In the diagram, the component labeled as 'Feed' refers to the cable, which supplies power to the circuit. The other options, such as the switch, lamp, and protective device, serve different functions in the system.

What is the function of the ceiling rose in the circuit?

• To support the lamp

• To connect the switch

• To house the protective device

• To connect the loop-in cable

Answer explanation

The ceiling rose serves primarily to support the lamp, providing a secure mounting point. It is not designed to connect the switch, house protective devices, or connect loop-in cables.

What type of lighting circuit is shown in the diagram?

• Two-way lighting circuit

• Single-way lighting circuit

• Three-way lighting circuit

• Four-way lighting circuit

Answer explanation

A two-way lighting circuit allows control of a single light from two different switches. The diagram likely shows this setup, distinguishing it from single-way, three-way, or four-way circuits.

What is the role of the loop-in cable in a lighting circuit?

• To provide power to the light

• To ground the circuit

• To increase the current

Answer explanation

The loop-in cable's primary role is to provide power to the light, ensuring it functions properly. Other options like connecting multiple lights or grounding are not its main functions.