Mold Remediation Certification Practice Exam

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What device is used to help prevent electrical shock while using portable power tools?

  1. Surge protector

  2. Ground Fault Circuit Interrupter (GFCI)

  3. Electrical circuit breaker

  4. Voltage regulator

The correct answer is: Ground Fault Circuit Interrupter (GFCI)

A Ground Fault Circuit Interrupter (GFCI) is specifically designed to prevent electrical shock while using portable power tools by detecting imbalances in the electric current. It continuously monitors the flow of electricity through a circuit and can quickly shut off power when it senses a discrepancy, such as when a person comes into contact with live electrical parts or if electricity is leaking to the ground. This quick response is critical in reducing the risk of electric shock, particularly in wet or damp environments where portable tools are often used. In contrast, a surge protector primarily protects against voltage spikes, an electrical circuit breaker serves to interrupt the flow of current in the event of overload or short-circuiting, and a voltage regulator manages voltage fluctuations but does not specifically address shock prevention. Thus, the GFCI is the most effective device for enhancing safety while operating portable power tools.

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