EasyAdditional Assistant Engineer (Electrical)2026✓ Editorially verified

Initial Fault Check

Which of the following is typically the first step when attempting to locate a fault in a residential electrical circuit?

⚑ Report issue

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Answer & Explanation

Correct AnswerB. Check the main distribution board for tripped circuit breakers or blown fuses

Quick 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.

Detailed Explanation

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.

Quick Trick

Troubleshooting starts at the supply/protection point, not by dismantling loads.

Exam Tip

Troubleshooting starts at the supply/protection point, not by dismantling loads.

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01 ADDITIONAL ASSISTANT ENGINEER.pdf2026Q. 26

Initial Fault Check

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