The dry-bulb temperature is 78°F and the wet-bulb temperature is 62°F. What is the relative humidity?

Correct Answer: Option C — 39%

Using standard psychrometric tables with a dry-bulb of 78°F and a wet-bulb of 62°F (a 16°F wet-bulb depression) yields a relative humidity of 39%, reflecting dry air conditions commonly found near continental highs.