Wiring and distribution Quiz Practice Quiz | Wiring…

Q: Which component is primarily used to protect a circuit from overcurrent and short circuits?

Circuit Breaker — A circuit breaker is an automatic switch designed to protect an electrical circuit from damage caused by excess current.

Q: In a standard residential wiring system, what is the purpose of the 'Earth' or 'Ground' wire?

To provide a safe path for fault current to prevent electric shocks — The ground wire provides a low-resistance path for fault current, ensuring safety by tripping protective devices during a short circuit.

Q: What is the primary function of a Distribution Board (DB) in a building?

To distribute electrical power to individual circuits — A distribution board divides the main power feed into subsidiary circuits, each protected by its own fuse or circuit breaker.

Q: Which wire color is standard for the 'Live' (or Hot) conductor in many international wiring color codes?

Brown or Red — Brown (modern IEC standard) or Red (older standard) are commonly used to identify the live conductor carrying the voltage.

Q: Why are electrical wires often covered in insulating material?

To prevent short circuits and protect users from electric shock — Insulation is a non-conductive material used to contain the current within the wire and prevent dangerous contact with people or other conductors.

Question 1 of 5

Which component is primarily used to protect a circuit from overcurrent and short circuits?

A circuit breaker is an automatic switch designed to protect an electrical circuit from damage caused by excess current.

Question 2 of 5

In a standard residential wiring system, what is the purpose of the 'Earth' or 'Ground' wire?

The ground wire provides a low-resistance path for fault current, ensuring safety by tripping protective devices during a short circuit.

Question 3 of 5

What is the primary function of a Distribution Board (DB) in a building?

A distribution board divides the main power feed into subsidiary circuits, each protected by its own fuse or circuit breaker.

Question 4 of 5

Which wire color is standard for the 'Live' (or Hot) conductor in many international wiring color codes?

Brown (modern IEC standard) or Red (older standard) are commonly used to identify the live conductor carrying the voltage.

Question 5 of 5

Why are electrical wires often covered in insulating material?

Insulation is a non-conductive material used to contain the current within the wire and prevent dangerous contact with people or other conductors.

Wiring and distribution Quiz