What is the science of moist air and its thermodynamic properties called?

Psychrometrics

The temperature measured by a standard thermometer is called _____ temperature.

Dry-bulb

True or False: Wet-bulb temperature is always higher than dry-bulb temperature.

False. Wet-bulb temperature is always less than or equal to dry-bulb temperature, except at saturation where they are equal.

Which formula represents Dalton's Law of Partial Pressures?
A) pV = mRT
B) p_total = p_a + p_v
C) W = 0.622(p_v/p_a)
D) φ = (p_v/p_vs) × 100%

B) p_total = p_a + p_v

What is the mass of water vapor per unit mass of dry air called?

Humidity ratio or specific humidity

At what temperature does condensation begin when moist air is cooled at constant pressure?

Dew point temperature

The specific gas constant for dry air is _____ kJ/(kg·K).

0.2870

True or False: Relative humidity is the ratio of actual water vapor pressure to saturation pressure.

True

During sensible heating, which property remains constant?
A) Dry-bulb temperature
B) Relative humidity
C) Humidity ratio
D) Enthalpy

C) Humidity ratio

What does the coefficient 0.622 represent in humidity ratio calculations?

Ratio of molecular weights of water vapor to dry air

Which process moves horizontally to the left on a psychrometric chart?

Sensible cooling

The enthalpy of moist air formula is h = h_a + W × _____.

H_v (enthalpy of water vapor)

True or False: Evaporative cooling follows a constant enthalpy line on the psychrometric chart.

False. It follows a constant wet-bulb temperature line, which nearly coincides with constant enthalpy.

What is the relationship between bypass factor and contact factor?
A) BF = CF
B) BF = 1 + CF
C) BF = 1 - CF
D) BF = CF²

C) BF = 1 - CF

The apparatus dew point represents the effective _____ temperature of the cooling coil.

Surface

How many Btu/hr equals one ton of refrigeration?

12,000 Btu/hr

In the mixing of two air streams, the final state lies on a _____ line connecting the initial states.

Straight

True or False: The specific heat of dry air is 0.240 Btu/(lbm·°F).

True

What does SHR stand for in psychrometric calculations?
A) Standard Heat Ratio
B) Sensible Heat Ratio
C) Steam Heat Ratio
D) Saturated Heat Ratio

B) Sensible Heat Ratio

The simplified formula Q_s = 1.08 × cfm × ΔT calculates _____ cooling load.

Sensible

Standard atmospheric pressure equals _____ psia.

14.696