To determine the average cargo hold dew point temperature, at what location would the dew point be measured?

Correct Answer: Option B — The dew point is taken at the ventilation exhaust trunk.

The ventilation exhaust trunk is the most representative location for measuring the average dew point of the cargo hold. Air exiting the hold has circulated through the entire space, picking up moisture and heat, providing a composite sample that accurately reflects the overall humidity conditions within the cargo environment.