Electrical installation

1. What is the purpose of earthing or grounding all exposed metal in an electrical circuit?

• To provide a safe path for electric current in case of a fault or short circuit

• To reduce the resistance of the circuit and increase the power output

• To prevent static electricity from building up and causing sparks

• To create a magnetic field around the circuit and improve its efficiency

1. Before working on a circuit, you must switch off the power supply. This is important to:

• Ensure safety and prevent any electrical accidents or damage

•  Save energy and reduce the environmental impact of electricity

• Test the continuity and polarity of the circuit and its components

• Avoid interference and noise from other electrical sources

1. Why is it important to use a fuse in an electrical circuit?

• To protect the circuit from overloading and overheating

• To increase the resistance and reduce the current flow

• To create a magnetic field and improve the circuit's efficiency

• To reduce the voltage and prevent electrical shocks

1. What is the purpose of a circuit breaker in an electrical system?

• To automatically cut off the power supply in case of a fault or overload

• To increase the voltage and improve the efficiency of the circuit

• To store electrical energy and release it when needed

• To reduce the resistance and increase the current flow

1. Why is it important to use insulated tools when working on electrical circuits?

• To prevent electric shocks and ensure safety

• To increase the conductivity and reduce the resistance

• To create a magnetic field and improve the efficiency of the tools

• To reduce the voltage and prevent overloading of the tools

What is the purpose of using a resistor in an electrical circuit?

• To limit the current flow and reduce the voltage

• To increase the resistance and prevent overloading

• To store electrical energy and release it when needed

• To create a magnetic field and improve the efficiency of the circuit

Why is it important to use a multimeter when testing electrical circuits?

• To measure voltage, current, and resistance accurately

• To increase the conductivity and reduce the resistance

• To create a magnetic field and improve the efficiency of the circuits

• To reduce the voltage and prevent electrical shocks

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

• To allow current flow in one direction and block it in the opposite direction

• To increase the resistance and reduce the current flow

• To store electrical energy and release it when needed

• To create a magnetic field and improve the efficiency of the circuit

What is the purpose of a capacitor in an electrical circuit?

• To store and release electrical energy when needed

• To increase the resistance and reduce the current flow

• To create a magnetic field and improve the efficiency of the circuit

• To allow current flow in one direction and block it in the opposite direction

Why is it important to use an ammeter when testing electrical circuits?

• To measure the current flow accurately

• To increase the resistance and reduce the voltage

• To create a magnetic field and improve the efficiency of the circuits

• To reduce the current flow and prevent electrical shocks