temperature humidity and ventilation Flashcards
(28 cards)
Heat is also known as ?
Energy
Moving more molecular energy will result in ?
Higher temperatures
Cold is the term used for the absense of ?
Heat
Multiply 1.8 and then add 32 to get from c to f true or false?
true
Thermodynamics is a branch that deals with ?
Mechanical action of heat
Thermodynamics that has heat always travels from ?
A warm object to a cold object
Whats happens to the cold water and a hot objects is put into the same water ?
Heat transfers till until they are the temp
What is conduction heat ?
Heat that transfers through a substance
Radiation is
Heat energy similar to light waves
What is sensible heat ?
Is the heat to a product but will not change the substance
Latent heat is ?
The amount of heat to change the substance with out the change of temperature
1 btu is use to raise ?
1 pound of water or 55 cubic feet of air
Humidity is ?
Volume of water in the air
Warmer air can hold more moisture true or false ?
True
Whats the minimum ventilation capacity ?
0.3
Principle exhaust fan should be able to push more then 50% percent of ?
Total ventilation capacity
Whats the ideal system of make up air ?
Demand controlled ventalation system
Air pollutants are also controlled by ?
Central system
Heating coil in make up air system will activate at ?
-15 c
To cut cost on heating and removing air pollutants is to ?
Use a hrv because it recovers the heat
Some hrv are capable of recovering how much heat ?
85%
Typical residential hrv can move up to ?
200 cfm
Hrv is designed for constant use at low speeds and higher speeds during high moisture environments
true
Define air volume?
Volume increases as air gets warm
