Electrical Components Quiz

What is the primary function of a circuit breaker in an electrical installation?

• To increase the current flow

• To protect against overvoltage

• To interrupt the current flow in case of an overload or short circuit

• To decrease the resistance in the circuit

Which type of wiring accessory is used to connect two or more wires together securely?

• Light switch

• Junction box

• Ceiling rose

• Outlet

What is the purpose of a consumer unit in an electrical installation?

• To manage the distribution of electricity around a building

• To provide a fixed lighting point

• To increase the electrical load capacity

• To connect external electrical devices

Which of the following is NOT a type of lighting fixture?

• Chandelier

• Fluorescent tube

• Circuit breaker

• Recessed light

In cable management, what is the purpose of trunking?

• To reduce electrical interference

• To protect cables and provide a neat installation

• To increase the voltage of electrical circuits

• To connect different electrical appliances

What is the main difference between MCB (Miniature Circuit Breaker) and MCCB (Molded Case Circuit Breaker)?

• MCB is used for high voltage circuits, whereas MCCB is used for low voltage circuits

• MCB can interrupt any circuit in milliseconds, whereas MCCB cannot

• MCCB can handle higher current ratings and has adjustable trip settings, whereas MCB does not

• MCB is used exclusively outdoors, whereas MCCB is used indoors

Which wiring accessory would be used to manually control the lighting in a room?

• Fuse

• Light switch

• Circuit breaker

• Connector block

What is the main purpose of a dimmer switch among lighting fixtures?

• To turn lights on and off

• To change the direction of light

• To adjust the brightness of lights

• To change the color of lights

In the context of cable management, what is the difference between conduit and trunking?

• Conduit is for outdoor use only, while trunking is for indoor use

• Conduit is designed to protect single cables, while trunking can accommodate multiple cables

• Trunking is used to increase cable length, while conduit is used to decrease it

• There is no difference; they are interchangeable terms

What characteristic of a circuit breaker determines its interrupting capacity?

• The length of the circuit breaker

• The voltage rating of the circuit breaker

• The current rating of the circuit breaker

• The color of the circuit breaker