Psychometrics

Question 1

1lb of moist air contains ___ grains of water or 0.02234lbs of water

Answer 1

16 grains

Question 2

Air has weight, ______ affects the weight

Answer 2

altitude

Question 3

Which weighs more? Dry or Wet air?

Answer 3

dry air because molecules closer

Question 4

fog occurs when air is __________

Answer 4

saturated

Question 5

What is RH?

Answer 5

Amount of water air is holding vs is able to hold total

Question 6

Warm air holds more moisture than cold air?

Answer 6

True

Question 7

Dew point is the temperature below which water vapour in the air will ______

Answer 7

condense

Question 8

Tool that measures moisture in the air?

Answer 8

hygrometer

Question 9

Wet-bulb temperature is always lower than dry bulb?

Answer 9

True

Question 10

Ideal RH for comfort in Summer/Winter

Answer 10

30-60%

Question 11

Which 5 properties of air does a psychrometric chart represent?

Answer 11

dry-bulb
wet-bulb
rh
specific volume
specific humidity

Question 12

As temperature increases, ____ decreases

Answer 12

RH

Question 13

Vertical lines represent

Answer 13

dry bulb temp

Question 14

Horizontal lines represent ________ (constant specific humidity)

Answer 14

moisture in grains

Question 15

Steep diagonal lines represent?

Answer 15

wet bulb temperatures

Question 16

Shallow diagonal lines represent?

Answer 16

specific volume

Question 17

Dashes outside represent?

Answer 17

Enthalpy and Sensible heat