Question 477General Subjects - Assistant Engineer70% to pass
Referring to the illustrated psychrometric chart, if the dry bulb temperature is 70oF and the relative humidity is 50%, what is the absolute humidity? Illustration GS-RA-22
AI Explanation
The correct answer is B) 45 grains of moisture per pound of dry air.
Referring to the psychrometric chart, if the dry bulb temperature is 70°F and the relative humidity is 50%, the absolute humidity can be determined by finding the intersection of these values on the chart. At 70°F and 50% relative humidity, the absolute humidity is approximately 45 grains of moisture per pound of dry air.
The other options are incorrect because they do not accurately represent the absolute humidity value corresponding to the given dry bulb temperature and relative humidity. The psychrometric chart is the standard tool used to determine various air properties, including absolute humidity, based on the known dry bulb temperature and relative humidity.
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#475 What temperature associated with the psychrometric properties of air is measured by an ordinary thermometer? #476 What temperature associated with the psychrometric properties of air is measured with a sling psychrometer? #478 Referring to the illustrated psychrometric chart, if the measured dry bulb temperature is 80oF and the measured wet bulb temperature is 70oF, what is the determined relative humidity? Illustration GS-RA-22 #479 Referring to the illustrated psychrometric chart, suppose air at a dry bulb temperature of 60oF and a relative humidity of 52% passes over a heating coil, resulting in sensible heat gain, and the off-coil temperature is now 80oF. What is off-coil relative humidity? Illustration GS-RA-22 #481 Referring to the illustrated psychrometric chart, suppose during the cooling season that air passes over a cooling coil with a mean surface temperature above the dew point temperature, and this results in sensible heat loss with no change in moisture content. What statement represents the direction of the air conditioning process line? Illustration GS-RA-22