Allied & ICAR Exam Bank • ALLIED_1280 NAT • 2 Marks

Section 6: Agricultural Process Engineering

Psychrometry and Grain Drying

Subtopic: Relative Humidity

Question Statement:

At a dry bulb temperature of $30^\circ\text{C}$, the saturation vapor pressure of water is $P_{vs} = 4.246\text{ kPa}$. If the actual partial vapor pressure of water vapor in the moist air sample is $P_v = 2.123\text{ kPa}$, the relative humidity ($RH$ in %) is:

Answer Key:

50.0

Step-by-Step Solution & Explanation

$RH = \frac{P_v}{P_{vs}} \times 100 = \frac{2.123}{4.246} \times 100 = 50.0\%$.
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