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Tuesday, January 06, 2009

Psychrometer is used for measuring Humidity

Question 52
Psychrometer is used for measuring -
a.         air velocity
b.         Core Temperature
c.         Humidity
d.         Height from Sea Level
Answer
Humidity
Reference
Park 18th Edition Page 557
QTDF
Park
Quality
Spotter
Status
Repeat
Discussion
The sling or whirling psychrometer consists of 2 mercury thermometers (wet and dry) mounted side by side on a suitable wooden frame, and provided with a handle for rotating the instrument. The underlying principle is that by rotating the bulbs are exposed to air at definite velocity.
Explanation :
Self Explanatory
Comments :
Other ways of measuring Humidty are
                                                  i.      Dry and wet bulb hygrometer
                                                ii.      Assmann Psychrometer
Tips :
Ä     Air velocity is measured by anerometer and kata thermometer
Ä     Wind direction is measured by Wind vane

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