Humber/Ontario Real Estate Course 4 Exam Practice

How can radon enter a house?

1. By thriving in damp areas similar to mold.

2. By accumulating in upper-level rooms.

3. Through cracks in the basement floors and walls.

4. Through electrical wiring conduits.

5. By seeping through ground-level windows.

6. By rising through chimney flues.

The correct answer is: Through cracks in the basement floors and walls.

Radon is a naturally occurring radioactive gas that can seep into homes from the underlying soil and rock. The most common pathway for radon to enter a house is through cracks in the basement floors and walls. This is because radon typically moves through the ground and can migrate into buildings via spaces and openings that exist due to imperfections in the foundation. Homes that are built on soil with high radon levels are particularly susceptible, especially if they have basements or crawl spaces where the gas can concentrate. Once radon enters these spaces, it can accumulate to dangerous levels, posing health risks to the occupants. The other options highlight scenarios that either do not effectively describe how radon enters a home or suggest mechanisms that are less relevant to the transfer of radon gas. For example, radon does not thrive like mold nor does it accumulate primarily in upper-level rooms; it tends to rise in a building but originates from the ground. Additionally, while radon can sometimes move through foundation elements, the movement through cracks is the primary entry method.