What is the temperature in degrees F if the humidity ratio is 70 GPP and the relative humidity is 60%?

To determine the temperature in degrees Fahrenheit when the humidity ratio is 70 grains per pound of dry air (GPP) and the relative humidity is 60%, we can use the relationship between humidity ratio, relative humidity, and temperature.

The humidity ratio is a measure of the amount of moisture in the air, while relative humidity expresses how much moisture the air currently holds compared to the maximum it could hold at that temperature. To find the actual temperature, one typically refers to psychrometric charts or utilizes formulas that relate these variables.

In this case, with a humidity ratio of 70 GPP and relative humidity at 60%, we can calculate the corresponding temperature. By consulting a psychrometric chart or performing the necessary calculations, we find that the temperature aligns with the value of 72°F. This aligns with standard values recognized in the field of water damage restoration and environmental controls, where precise humidity and temperature relationships are documented.

Thus, 72°F is the temperature that satisfies both the given humidity ratio and relative humidity, making it the correct answer.