Deck General USCG Question #4755 (Set 150)

Using the available references, if the dry bulb temperature is 58° and the wet bulb temperature is 53°, what is the relative humidity in a cargo hold?

Official USCG Answer & Rule Citation

Correct Answer: Option D — 72%

Psychrometric chart interpolation between dry bulb 58°F and wet bulb 53°F determines the moisture content relative to saturation, yielding a relative humidity of 72% within the ventilated cargo hold space.

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