Question 478General Subjects - Assistant Engineer70% to pass
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
AI Explanation
The correct answer is B) 60%.
Based on the given dry bulb temperature of 80°F and wet bulb temperature of 70°F, using the psychrometric chart (illustration GS-RA-22), the determined relative humidity is 60%.
The psychrometric chart is a tool used to determine various properties of air, including relative humidity, based on the dry bulb and wet bulb temperatures. By locating the intersection of the 80°F dry bulb temperature and the 70°F wet bulb temperature on the chart, the corresponding relative humidity value is 60%.
The other answer choices are incorrect because A) 45% is too low, C) 70% is too high, and D) 95% is significantly higher than the correct value determined from the psychrometric chart.
Related Questions
#476 What temperature associated with the psychrometric properties of air is measured with a sling psychrometer? #477 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 #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 #482 Referring to the illustrated psychrometric chart, suppose during the cooling season that air passes over a cooling coil with a mean surface temperature below the dew point temperature, and this results in sensible heat loss and dehumidification. What statement represents the direction of the air conditioning process line? Illustration GS-RA-22