Final answer:
The rule of thumb for ventilation holes is typically around 1% of the total roof surface area in the field of engineering, designed to regulate temperature, control humidity, and improve air quality.
Step-by-step explanation:
In the field of engineering, particularly building design and construction, the rule of thumb for the proportion of the roof surface area occupied by ventilation holes is that it should be around 1% (Option A). This means, for every 100 square meters of roof, there should be about 1 square meter of ventilation holes. Ventilation in a building is essential for controlling temperature, humidity, and air quality, especially in an environment where machinery or people generate heat and moisture. It's important to note that depending on the specific requirements and circumstances, this percentage might need to be adjusted.
In the field of engineering, when considering ventilation for a roof, a rule of thumb is to have ventilation holes that constitute at least a certain percentage of the roof surface of the involved area. The correct answer to the given multiple-choice question is option D, 4%.
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