A sling psychrometer is a(n) __________.
Official USCG Answer & Rule Citation
Correct Answer: Option A — instrument used to measure relative humidity
A sling psychrometer operates by evaporating moisture from a wetted wick across a thermometer bulb via rapid manual rotation, providing the wet-bulb depression needed to determine ambient relative humidity.
100% Free & Open Access — No daily limits, paywalls, or gated answers on BrightMariner.