Electrician Red Seal · Question
During a routine inspection, an electrician notices an unusual humming sound and a slight smell of overheating emanating from a dry-type 45 kVA transformer. Which of the following is the most immediate action to take?
Overheating and unusual sounds indicate a potentially dangerous condition that could lead to transformer failure or fire. The most immediate and safest action i
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Question: During a routine inspection, an electrician notices an unusual humming sound and a slight smell of overheating emanating from a dry-type 45 kVA transformer. Which of the following is the most immediate action to take?
Answer options:
- Check the voltage readings at both primary and secondary terminals.
- Attempt to tighten all visible terminal connections.
- Reduce the load on the transformer by de-energizing some circuits. ✅ De-energize the transformer immediately and investigate the cause.
Correct answer: De-energize the transformer immediately and investigate the cause.
Explanation: Overheating and unusual sounds indicate a potentially dangerous condition that could lead to transformer failure or fire. The most immediate and safest action is to de-energize the transformer to prevent further damage or hazard before investigating the cause.
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- A residential garage is to be wired with a 15 A, 120 V duplex receptacle. According to the Canadian Electrical
- During a renovation of a commercial kitchen, an electrician needs to replace an old single-phase, 240 V, 5 kW
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