Chapter 21- Psychrometric Charts Exam Questions & Answers

Chapter 21- Psychrometric Charts
Exam Questions & Answers5

If too much sensible heat and not enough Latent heat are removed, the room feels ____ and
______. - ANSWERS-Cold and damp

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What values is the index point located at? - ANSWERS-78F DB and

65F WB

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On a Trane psychometric chart; what are the curved lines that represent the changes in dry bulb
and wet bulb temperatures as air passes through a "typical" cooling coil performance -
ANSWERS-Coil curves

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What is the density of air at standard conditions (sea level) 69.5DB - ANSWERS-0.075 lb/ft3



0.075x60 min/hr=4.5



What properties of air does the graph of a psychrometric chart plot? - ANSWERS-Dry-bulb temp

Wet-bulb temp

Relative humidity

Specific volume

Specific humidity

Pg508. 19th

, What is a psychometric chart used for? - ANSWERS-To determine how changes in one property
affect the other properties of the air

Ch21 ph509



What property up air changes when moisture content changes - ANSWERS-Dewpoint

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What property of air runs parallel either wet bulb on a Psychrometric chart - ANSWERS-Relative
humidity

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Is water vapor heavier or lighter then air? - ANSWERS-Lighter

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______ is the inverse of specific volume - ANSWERS-Density

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1/density= - ANSWERS-Specific volume

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More specific volume = _______ density - ANSWERS-Less density

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Does dry Bulb temperature change while only dehumidifying - ANSWERS-No

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