Construction Supervisor License Practice Exam

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What is the minimum amount of window glass required for natural lighting of a habitable room if its floor measures 10 feet by 12 feet, in square feet?

4.8
9.6
12.0
14.2

The correct answer is: 9.6

To determine the minimum amount of window glass required for natural lighting in a habitable room, the general rule is that the total area of the windows should equal a certain percentage of the floor area. This is often calculated based on the size of the room to ensure it receives adequate natural light. First, calculate the floor area of the room. The room measures 10 feet by 12 feet, so the floor area is: 10 feet * 12 feet = 120 square feet. For a habitable space, the commonly accepted guideline is that window glass should cover at least one-tenth of the room's floor area to provide sufficient natural light. Now, taking one-tenth of the floor area: 120 square feet * 0.10 = 12 square feet. Therefore, the minimum amount of window glass required for this habitable room is 12 square feet, which corresponds with the correct answer. This ensures that occupants have a comfortable level of natural lighting, enhancing their livability and contributing to the overall atmosphere of the space.