Millwright Level 1 Practice Exam

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What does a GFCI help prevent?

  1. Excessive vibration

  2. Overheating of equipment

  3. Electrical shock hazards

  4. Excessive noise

The correct answer is: Electrical shock hazards

A Ground Fault Circuit Interrupter (GFCI) is designed specifically to help prevent electrical shock hazards. It achieves this by constantly monitoring the electrical current flowing through the circuit. If it detects an imbalance between the outgoing and incoming current, which could occur if current is leaking through a person who is in contact with a ground fault, the GFCI quickly shuts off the power. This rapid response is crucial in protecting individuals from the dangers associated with electrical shocks, particularly in environments where moisture is present, such as kitchens and bathrooms. Understanding the role of a GFCI is important because it highlights the safety measures that are integral to electrical installations and usage. By preventing electrical shocks, GFCIs contribute significantly to reducing the risk of serious injury or fatalities caused by electrical accidents.

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