HVAC 1
Which Heating method is most commonly used as a heat source in cold climates?
Natural Gas
At what temp does a heat pump no longer produce heat?
What is anything below 35
Freezing Temperature on Water in Centigrade
What is Zero Degrees
What is the Purpose of the Condenser?
What is Transfers Heat from the refrigerant to the outdoors
Which air to air device is used for energy conservation?
What is a Heat Recovery Ventilator
Which device is used to maintain indoor Air Quality and control Bacteria growth?
Ultraviolet Light
If refrigerant is removed from a system and held in a storage tank for return to the same system, it is said to have been: Reclaimed, Recycled, Recovered or Restored?
Recovered
A BTU is equivalent
What is a match?
Oxygen is never used to purge an HVAC system because?
What is Cause an explosion could occur under certain conditions
Heatpumps use (-------) as a backup heat source
What are heat strips?
A Defrost cycle is required in what type of system?
Heat Pump
When can used refrigerants be sold
What is never?
A leak in the vent pipe of a gas furnace is a concern because it can release what?
Carbon Monoxide
Absolute suction pressure divided by absolute discharge pressure
What is compression ratio
The volume of an ideal gas is directly proportional to its temperature at a constant pressure
What is Charles Law
Term applied to heat absorbed above a refrigerants saturation point
What is Superheat
The weight of cubic foot of water
What is 62.4 Lbs
What is the 4 main elements of a mechanical refrigeration system?
Compressor, Evaporator, Condenser and Expansion Device
A Hydronic system circulates what?
Hot water
Phosgene gas can be produced when some refrigerants are exposed to what?
What is A Flame
What does the Expansion device in a mechanical refrigeration system do?
Slows the flow of refrigerant and provides a pressure drop.
What layer in our atmosphere is most affected by venting or releasing refrigerant?
What is the ozone layer?
What is the purpose of the Evaporator in the Refrigeration Cycle?
What is to Transfer Heat from the air to the Refrigerant
A Chart or table that used to determine a pump's performance
What is a pump curve
The amount of BTUs needed to change 212 degree water to 212 degree steam
What is 970