Deck General USCG Question #4754 (Set 150)

Using the available references, if the dry bulb temperature is 98°and the wet bulb temperature is 87°, what is the relative humidity in a cargo hold?

Official USCG Answer & Rule Citation

Correct Answer: Option B — 64%

Entering standard psychrometric tables with a dry bulb temperature of 98°F and a wet bulb temperature of 87°F yields a relative humidity value of 64% in the compartment, vital for monitoring moisture-sensitive breakbulk or containerized cargoes.

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