Humber/Ontario Real Estate Course 4 Exam Practice

What are Ground Fault Circuit Interrupters (GFCIs) designed to do?

1. Installed on all circuits in new houses

2. Most commonly associated with older knob-and-tube wiring

3. Detect minor leakages in circuits

4. Used solely in bathrooms and outside outlets

The correct answer is: Detect minor leakages in circuits

Ground Fault Circuit Interrupters (GFCIs) are designed to detect minor leakages in circuits. They are safety devices that constantly monitor the flow of electricity in a circuit and quickly shut off power when they sense even a small imbalance, which could indicate a leakage or fault to ground. This helps prevent electric shock and electrical fires, making them an essential safety feature in areas where water is present, such as kitchens, bathrooms, outdoor outlets, and other potentially hazardous locations. Options A, B, and D are incorrect because GFCIs are not required to be installed on all circuits in new houses, they are not specifically associated with older knob-and-tube wiring, and they are not used solely in bathrooms and outside outlets. GFCIs are typically installed in specific locations to enhance safety and are not limited to these areas only.