Previous Year Question
Which of the following is typically the first step when attempting to locate a fault in a residential electrical circuit?
Correct answer: B
Explanation
The safest and most efficient first check is the main distribution board. A tripped breaker or blown fuse can immediately identify the affected circuit before any dismantling is attempted.
Step-by-step solution
Correct Answer
B — Check the main distribution board for tripped circuit breakers or blown fuses
Explanation
The safest and most efficient first check is the main distribution board. A tripped breaker or blown fuse can immediately identify the affected circuit before any dismantling is attempted.
Key Concept
Initial Fault Check
Exam Point
Troubleshooting starts at the supply/protection point, not by dismantling loads.
Exam tip
Troubleshooting starts at the supply/protection point, not by dismantling loads.
Quick method
Troubleshooting starts at the supply/protection point, not by dismantling loads.