Using the available references, if the dry bulb temperature is 55°F (13°C) and the wet bulb is 50°F (10°C), what is the relative humidity?

Correct Answer: Option D — 82%

Entering the psychrometric table with a dry bulb temperature of 55°F and a wet bulb of 50°F yields a depression of 5°F. Cross-referencing these values produces a relative humidity of 82%, critical for preventing cargo sweat.