Psychrometrics Flashcards
(16 cards)
Heat that results in a change in state but no change in temperature is referred to as?
Latent heat
Sensible heat is heat result in which of the following?
Change in temperature
Which of the following terms is a measurement of humidity?
Both relative and absolute humidity
In areas of high relative humidity, the evaporation rate of moisture will?
Decrease
How many BTU’s are required to change 1 pound of 212 degree of water to 212 degree of steam?
970 BTU’s
Heat transfer that is a result of fluid movement of air or water is referred to as?
Convection
Heat transfer between two objects in contact with one another is referred to as?
Conduction
Heat transfer via electromagnetic waves is referred to as?
Radiation
Heat flows in which of the following direction?
From areas of high concentration to areas of low concentration. Hot to cold
How can the accuracy of a thermometer be checked or calibrated?
By placing the thermometer in 32 degree F mixture of ice and distilled water
Which type of thermometer is non-contact thermometer?
Infrared thermometer (IR)
What can be measured by placing a wet fabric sock over the sensor portion of a thermometer, and moving it across air?
Wet bulb
When the dry bulb and wet bulb are at the same temperature, the air is to be?
At its dew point and saturated
What instrument is used to measure both wet and dry bulb?
Psychrometer
After plotting the measured wet and dry bulb temperatures on a psychrometer chart, which other air properties can be determined?
Enthalpy,relative humidity, dew point or saturation temperature
Absolute humidity is measured in what units?
Grains of moisture per pound of air
