312 - Electrical circuits and components

What are the typical electrical circuits found in a modern dwelling?

• Ring main, Lighting, Power circuit (radial)

• Solar panel, Wind turbine, Battery storage

• Generator, Transformer, Inverter

• Circuit breaker, Fuse, Resistor

How many ring mains are typically found in a modern dwelling?

• 1

• 2

• 3

• 4

Where are the lighting circuits typically located in a modern dwelling?

• Both upstairs and downstairs

• Only in the kitchen

• Only in the living room

• Only in the basement

What might the power circuits in a modern dwelling be used for?

• Cooker, central heating, and alarm

• Television, radio, and computer

• Refrigerator, microwave, and dishwasher

• Washing machine, dryer, and vacuum cleaner

What do consumer units house for radial and ring final circuits?

• Individual MCBs

• Circuit breakers

• Fuses

• Transformers

What is incorporated in consumer units to provide protection against earth leakage?

• RCD

• Fuse

• Circuit breaker

• Transformer

As of 2019, what material must all newly installed consumer units be made of?

• Metallic

• Plastic

• Wood

• Ceramic

What protects the consumer unit in a circuit protective device setup?

• Single pole isolator

• Double pole main isolator

• Circuit breaker

• Fuse

How are the MCBs split in the circuit protective device setup?

• In a single bank

• In three banks

• In two banks

• Randomly

What does each bank of MCBs have for protection?

• Its own fuse

• Its own RCD

• Its own circuit breaker

• Its own isolator