Electrical Isolators Quiz LO 1.3 /1

What is the primary purpose of an isolator in electrical circuits?

• To ensure circuits are safe and de-energised for maintenance

• To increase the voltage in a circuit

• To provide backup power during outages

• To enhance the speed of electrical flow

What are isolators often referred to as?

• Circuit breakers

• Main switches

• Transformers

• Fuses

What function do isolators serve in relation to the power supply?

• They connect the circuit to the power supply

• They separate the circuit from the power supply

• They increase the power supply

• They convert AC to DC

What is the most common type of protective device fitted in modern domestic installations?

• Rewireable fuses

• Cartridge fuses

• Circuit breakers (CBs)

• Surge protectors

Which standard does BS EN 60898 supersede?

• BS 1363

• BS 7671

• BS 3871

• BS 5733

What size circuit breaker is typically used for lighting?

• 10A

• 6A

• 16A

• 32A

What is one advantage of circuit breakers over rewireable fuses?

• They are cheaper

• They can be reset easily

• They are smaller in size

• They require no maintenance

What does the actual rating of a device depend on?

• The color of the device

• The design current of the circuit

• The size of the device

• The brand of the device

Which types of circuit breakers are specified in BS EN 60898?

• A, B, C

• B, C, D

• C, D, E

• D, E, F

On what principle do circuit breakers (CBs) work?

• Hydraulic

• Thermal/magnetic

• Optical

• Chemical