Environmental Protection Agency (EPA) Model Lead Based Paint Risk Assessor Practice Test

What does the term 'window sill' refer to?

1. The side vertical part of a window

2. The top horizontal part of a window

3. The bottom horizontal part of a window opening

4. The glass panel of a window

The correct answer is: The bottom horizontal part of a window opening

The term 'window sill' specifically refers to the bottom horizontal part of a window opening. This structure serves several purposes, including providing a stable support for the window itself and serving as a barrier to prevent rain and moisture from entering the interior of a building. In the context of assessing lead-based paint hazards, understanding these architectural elements is crucial, as window sills are common locations for lead dust accumulation in homes built before 1978 when lead-based paints were banned for residential use. Because of their position and likelihood of wear and tear, window sills can often be a significant risk factor for lead exposure, making it essential for risk assessors to identify and evaluate them during inspections. The other specified parts of a window, such as the vertical sides, top horizontal part, and glass panel, do not align with the defined role of a window sill.