Probable Effect Concentration Quotients (PECQS) Practice Test

How many wall switch-controlled lighting outlets must be installed in every habitable room and bathroom?

1. One

2. Two

3. Three

4. Four

The correct answer is: One

In residential construction, building codes typically require at least one wall switch-controlled lighting outlet to be installed in every habitable room and bathroom. This is to ensure that occupants have convenient access to light upon entering a room. Having at least one controlled outlet means that individuals don't have to fumble for light switches in dark spaces, thereby enhancing safety and usability. While additional switches or outlets could certainly be beneficial for larger rooms or for improving overall lighting design, the minimum requirement is one. This focus ensures that even the smallest or simplest space is adequately lit and easily accessible, which is a critical aspect of creating functional living environments.