Humber/Ontario Real Estate Course 2 Exam Practice

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What is a primary function of ground fault circuit interrupters?

  1. Associated with older wiring systems

  2. Installed on all circuits in new homes

  3. Required in bathrooms only

  4. Detects minor leakages in circuits

  5. Used solely on exterior outlets

  6. Used to test circuit functionality

The correct answer is: Detects minor leakages in circuits

The correct answer is D. Ground fault circuit interrupters (GFCIs) are designed to detect any minor leakages of current in a circuit. When a GFCI senses a leakage, it quickly shuts off the power, which helps prevent electric shocks and potential electrical fires. This additional safety feature makes them a crucial component in electrical systems, particularly in areas where water may be present, such as kitchens, bathrooms, and outdoor outlets. Options A, B, and E are incorrect because GFCIs are not specifically associated with older wiring systems, installed on all circuits in new homes, or used solely on exterior outlets. Option C is incorrect as GFCIs are required in more locations than just bathrooms. Option F is also incorrect because although GFCIs may have a test function, their primary purpose is to detect minor leakages in circuits for safety reasons.

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