Question

Point 8 represents?

(a) % Relative humidity curve

(b) 100% Relative humidity

(c) Wet bulb line

(d) None of the mentioned

I have been asked this question in examination.

This interesting question is from Psychrometric chart in portion Humidity Charts and Analysis of the Degrees of Freedom in Steady-State Processes of Chemical Process Calculation

Answer 1

The correct answer is:

(b) 100% Relative humidity

Explanation: On a psychrometric chart, Point 8 generally represents the 100% relative humidity line (also known as the saturation line), where the air is fully saturated with moisture. At this point, the air cannot hold any more water vapor, meaning the relative humidity is at its maximum, or 100%.

• % Relative humidity curve: Represents various levels of relative humidity, not necessarily 100%.
• Wet bulb line: Refers to lines indicating wet-bulb temperature, which differ from the 100% humidity line.
• None of the mentioned: This option is incorrect, as 100% relative humidity is commonly represented on psychrometric charts.

So, Point 8 typically indicates 100% relative humidity on the psychrometric chart.