Chemistry Lab Safety Practice Test

How should you respond if a piece of electrical equipment emits smoke or shows signs of overheating?

Turn off the power at the switch or unplug if safe, evacuate if necessary, and report to supervisor Continue using and monitor later Pour water on it Cover with a cloth

Correct Answer:

Turn off the power at the switch or unplug if safe, evacuate if necessary, and report to supervisor

Explanation:

When electrical equipment shows smoke or signals overheating, the priority is to remove the source of energy and protect people. If it’s safe to do so, switch off the power at the device or unplug it. This stops the electrical current from feeding the problem and reduces the risk of a more serious fire or shock. If there’s any danger to people—heavy smoke, heat, or the area feels unsafe—evacuate and get help from a supervisor or safety officer. Do not pour water on electrical equipment, as water conducts electricity and can spread the hazard or cause electrocution. Do not cover the device with a cloth; that can trap heat and delay responding to the problem. After securing people and the area, report the incident so it can be handled by trained personnel.

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