Terms

Question 1

saturation temperature corresponding to the actual pressure of the steam in air or the temperature at which condensation of moisture begins when the air is cooled at constant pressure.

Answer 1

dewpoint temperature

Question 2

study of properties of mixtures of air and water vapor

Answer 2

Psychrometry

Question 3

properties of moist air

Answer 3

psychrometric properties

Question 4

temperature of air as registered by an ordinary thermometer

Answer 4

dry-bulb temperature

Question 5

temperature of air registered by a thermometer whose bulb is covered by a wetted wick and exposed to a current of rapidly moving air

Answer 5

wet-bulb temperature

Question 6

The total pressure of air-water vapor mixture is the sum of the partial pressures of dry air and water vapor. This is based on what law?

Answer 6

Dalton’s Law of Partial Pressure

Question 7

The ratio of the mass of water vapor to the mass of dry air

Answer 7

humidity ratio, specific ration, mixing ration or moisture content

Question 8

The ratio of the partial pressure of water vapor in the air to the saturation pressure corresponding to the temperature of the air

Answer 8

Relative Humidity

Question 9

The number of cubic meter of mixture per kilogram of air.

Answer 9

Specific Volume

Question 10

The enthalpy of the mixture of dry air and water vapor is the sum of the enthalpy of the dry air and the enthalpy of the water vapor

Answer 10

Enthalpy

Question 11

The ratio of the air humidity ratio to the humidity ratio of saturated air at that temperature.

Answer 11

Degree of Saturation

Question 12

When air at one condition is mixed with air at another condition, the condition of the final mixture can be shown on the psychrometric chart by a point on the line joining the points indicating the original condition. The exact location of the final point will depend upon the masses of the original air quantities.

Answer 12

Air mixing

Question 13

used in the study of air conditioning processes

Answer 13

conservation of mass and energy

Question 14

required for maintaining proper temperature and humidity in living space such as residential, commercial, and industrial facilities.

Answer 14

analysis of air conditioning process

Question 15

added to increase the temperature of the air without changing the amount of its components

Answer 15

sensible heating

Question 16

sensible heat is rejected to decrease the temperature of the air without changing the amount of its components

Answer 16

sensible cooling

Question 17

increase in water vapor content

Answer 17

humidifying

Question 18

decrease in water vapor content

Answer 18

dehumidifying

Question 19

heat need to add or removed from a substance so that the temperature will increase or decrease, respectively

Answer 19

sensible heat

Question 20

device commonly used to cool condenser water in power and refrigerating plants.

Answer 20

cooling tower

Question 21

water that receives the heat rejected by a condenser unit

Answer 21

condenser water or cooling water

Question 22

reduction in temperature of the water through the cooling tower. Or simply the difference between the hot and cold temperature of the cooling water.

Answer 22

range

Question 23

difference between the temperature of the leaving cool water and the wet-bulb temperature of the entering air.

Answer 23

approach

Question 24

cooling effectiveness of a cooling tower

Answer 24

cooling tower efficiency

Question 25

amount of water needed for the lost amount of water due to evaporation.

Answer 25

make-up water requirement