Electrical Instal. Quiz

Which of the following is the British Standard for wiring regulations?

• BS 7671

• BS 1363

• BS 5733

• BS 5266

What is the primary purpose of an RCD (Residual Current Device) in a circuit?

• To prevent overloading

• To protect against electric shock

• To regulate voltage

• To measure current

Which of the following is a key safety precaution when working with electrical installations?

• Wearing rubber-soled shoes

• Using a wooden ladder

• Ensuring the power is turned off

• Wearing a hard hat

What is the minimum insulation resistance value for a new electrical installation as per BS 7671?

• 0.5 MΩ

• 1 MΩ

• 2 MΩ

• 5 MΩ

Which component is used to protect a circuit from overcurrent?

• Resistor

• Capacitor

• Circuit breaker

• Transformer

What is the correct colour coding for a live wire in a UK electrical installation?

• Blue

• Brown

• Green/Yellow

• Black

Which of the following is a common method for testing the continuity of a circuit?

• Using a voltmeter

• Using an ohmmeter

• Using a wattmeter

• Using an ammeter

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

• To increase current flow

• To reduce voltage

• To protect against overcurrent

• To store electrical energy

Which installation technique is used to ensure that cables are not damaged when passing through walls?

• Using cable ties

• Using conduit

• Using junction boxes

• Using cable clips

What is the standard voltage for domestic electrical installations in Great Britain?

• 110V

• 230V

• 240V

• 400V