Electrical Faults and Overcurrent Quiz

Which color represents a 15A BS 3036 semi-enclosed fuse?

• Green

• Blue

• Red

• Yellow

What is one reason BS 88-3:2010 cartridge fuses do not deteriorate with age?

• They have a large physical size

• They have no mechanical moving parts

• They are made of plastic

• They are frequently replaced

What is the main purpose of a circuit breaker to BS EN 60898?

• To increase electrical load

• To provide circuit protection

• To reduce installation costs

• To enhance circuit complexity

Which component in a circuit breaker is responsible for interrupting the arc?

• Box terminal

• Arc chamber

• DIN clip

• Trip bar

Which part of the circuit breaker is used to secure it to a mounting rail?

• Box terminal

• Thermal element

• DIN clip

• Trip bar

Which component provides a connection point for wires in a circuit breaker?

• Box terminal

• Arc chamber

• Magnetic hammer action solenoid

• Trip bar

Which component in a circuit breaker remains stationary?

• Moving contact

• Fixed contact

• Trip bar

• Thermal element

Which circuit breaker type is not suitable for general use?

• Type 1

• Type 2

• Type 3

• Type 4

What is the trip current range for a Type 3 circuit breaker?

• 2.7 to 4 Iₙ

• 3 to 5 Iₙ

• 7 to 10 Iₙ

• 10 to 50 Iₙ

What is the purpose of the 'Test button' in an RCD?

• To test the functionality of the RCD

• To reset the RCD

• To increase the current flow

• To decrease the voltage