International Brotherhood of Electrical Workers Exam IBEW Quiz
20 questions · no time limit
0:00
READING COMPREHENSION
Question 1 of 20
No time limit
Current
Answered
Flagged
Not seen
PASSAGE
Circuit breakers and fuses both serve the same primary function: overcurrent protection. They are designed to interrupt the flow of electricity automatically if the current reaches an unsafe level, protecting equipment and preventing fires. The key difference lies in their operation. A fuse contains a thin strip of metal that melts when overheated by excess current, creating a gap that stops the flow. This action is permanent, and the fuse must be replaced. A circuit breaker, on the other hand, is essentially an automatic switch. It uses an electromagnet or a bimetallic strip to 'trip' open when it detects an overcurrent. It can then be manually reset to restore the circuit, making it reusable.
What is the main topic of this passage?
YOUR PROGRESS
20
QUESTIONS
Ready when you are
Answer in any order. Your progress shows here as you go.
QUESTIONS
KEYBOARD
Pick an answer ABCD
Next question ↵→
Previous ←
Flag for review F
Answers save as you go · flagged questions come back at the end