HVAC Exam Questions Correctly Answered and
Updated!!!
HVAC - ANSWER Heating, ventilation, and air conditioning
How has the advent of AC changed where we develop hotels and where guests travel
during different seasons of the year? - ANSWER People didn't used to go to southern
states in the summer but now it doesn't matter
Sensible Heat - ANSWER Dry bulb temperature; what you feel (regular temp)
Latent Heat - ANSWER Wet bulb temperature; factors in the effects of water in the air
(relative humidity)
Condensation - ANSWER Water vapor in the air; when air is warm and class is cool,
vapor condenses into liquid
Dew point - ANSWER the temperature at which water molecules turn from vapors to
liquid (creates condensation)
Relative humidity - ANSWER the amount of water vapor present in the air expressed as
a percentage of the amount needed for saturation at the same temperature
Evaporation - ANSWER Liquid --> vapor
Conditioned air - ANSWER Treating air in some way (not necessarily cooling, so not the
same as air conditioning)
, IAQ - ANSWER Indoor air quality (temp, filtration, etc.)
BTU - ANSWER British thermal unit; measure of the power of heating or cooling; more
BTUs = greater capacity for cooling
ASHRAE - ANSWER American Society of Heating, Refrigerating, and Air Conditioning
Engineers; write codes and standards for heating and AC
Types of heat transfer - ANSWER Radiation, convection, conduction
Radiation - ANSWER Waves
Convection - ANSWER Transferred through air/liquid
Conduction - ANSWER Direct contact
HVAC goals - ANSWER 1. Control (dry bulb) temp
2. Provide fresh air (bring in outdoor air to mix with return air)
3. Provide circulating air (move air around for even temp)
4. Exhaust odors/irritants
5. Provide clean air (filter air)
6. Raise or lower humidity
Why do you want to mix fresh outdoor air with return air? - ANSWER Want higher levels
of oxygen, helps control temp, cleaner air (sometimes)
Updated!!!
HVAC - ANSWER Heating, ventilation, and air conditioning
How has the advent of AC changed where we develop hotels and where guests travel
during different seasons of the year? - ANSWER People didn't used to go to southern
states in the summer but now it doesn't matter
Sensible Heat - ANSWER Dry bulb temperature; what you feel (regular temp)
Latent Heat - ANSWER Wet bulb temperature; factors in the effects of water in the air
(relative humidity)
Condensation - ANSWER Water vapor in the air; when air is warm and class is cool,
vapor condenses into liquid
Dew point - ANSWER the temperature at which water molecules turn from vapors to
liquid (creates condensation)
Relative humidity - ANSWER the amount of water vapor present in the air expressed as
a percentage of the amount needed for saturation at the same temperature
Evaporation - ANSWER Liquid --> vapor
Conditioned air - ANSWER Treating air in some way (not necessarily cooling, so not the
same as air conditioning)
, IAQ - ANSWER Indoor air quality (temp, filtration, etc.)
BTU - ANSWER British thermal unit; measure of the power of heating or cooling; more
BTUs = greater capacity for cooling
ASHRAE - ANSWER American Society of Heating, Refrigerating, and Air Conditioning
Engineers; write codes and standards for heating and AC
Types of heat transfer - ANSWER Radiation, convection, conduction
Radiation - ANSWER Waves
Convection - ANSWER Transferred through air/liquid
Conduction - ANSWER Direct contact
HVAC goals - ANSWER 1. Control (dry bulb) temp
2. Provide fresh air (bring in outdoor air to mix with return air)
3. Provide circulating air (move air around for even temp)
4. Exhaust odors/irritants
5. Provide clean air (filter air)
6. Raise or lower humidity
Why do you want to mix fresh outdoor air with return air? - ANSWER Want higher levels
of oxygen, helps control temp, cleaner air (sometimes)
