Question 222General Subjects - 1st Asst/Chief70% to pass
Referring to the illustrated psychrometric chart, if the dry bulb temperature is 70oF and the relative humidity is 40%, 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.
This can be determined by referring to the psychrometric chart. Given the dry bulb temperature of 70°F and the relative humidity of 40%, the absolute humidity can be read directly from the chart, which indicates a value of approximately 45 grains of moisture per pound of dry air.
The other answer choices are incorrect because they do not accurately reflect the absolute humidity at the specified dry bulb temperature and relative humidity, as shown on the psychrometric chart.
Related Questions
#220 Referring to the illustrated psychrometric chart, under what conditions are the dry bulb, wet bulb, and dew point temperatures for air all equal in value? Illustration GS-RA-22 #221 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 #223 What temperature associated with the psychrometric properties of air is measured by an ordinary thermometer? #224 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 #225 The minimum number of crew members permitted by law to operate your vessel can be determined by checking the _______________.