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36 Cards in this Set

  • Front
  • Back
______ load is when a space is to cold
Heating
______ load is when a space is to Hot
cooling
4 grains of moisture in the air the air can hold 16 what is relative humidity?
25%
when air is cooled to the point where it's relitive humidity is 100% and the moisture can condense and separate, we say the air has reached it's ______ _____ temp.
Dew Point
A liquid will _____ heat when it vaporizes or boils, and the vapor will _____ heat when it condeneses.
loss, reject
The colder the air temp the _____ moisture it can hold.
less
What is used to clean the air going through the return vent?
Filter
What does the metering Device do to the refrigerant?
Flashes
The heat that has been absorbed in the Evaporator is rejected in the _______ .
Condincer
What are the four things that air conditioning controls?
temp, cerculation,air cleaness, humidity
The air flowing from the conditioned Space to the Air Conditioning Unit is know as _______.
return
The air flowing from the air Conditioned unit to the conditioned Space is known as _______.
Supply
Refrigerant properties can be classified as ______ and _______
Physical, Thermodynamic
The ________ is the medium that picks up and carries the heat in the Refrigeration cycle.
refrigerant
Thermodynamic Properties are the proerties of the refrigerant that have to deal with the movement of _________
Heat
When moisture is present in a refrigeration system, what two problems will normally occur in the system?
Broke metering device
Formation of ACIDS
When a refrigerant saturated with moisture is _______, the water will be released.
Cooled
T/F
Liquid r-22 can be pourwed from a bucket under normal room conditions.
F
T/F
The Enthalpy(BTU's) of the saturated gas minus the Enthalpy(BTU's) of the liquid is equal to the latent heat(BTU's)
T
T/F
Water and Alcohol are Miscible.
F
T/F
R-22 is always a miscible refrigerant.
F
T/F
R-22 and R-12 are not toxic therefore they are never dangerous.
F
T/F
Will support combustion under certain conditions.
T
T/F
The latent heat BTU's and the refrigeration effect BTU'S can be the same for a refrigerant.
T
Which of the following iteams are considered accessories to a Manifold Gauge Set?
Hanger and Hose Storage Jack
The process to remove contaminants( air & Moisture) from the manifold and pressure Hoses is called?
Purging
Your Manifold Gauges are connected to an operating unit and both gauge valves are back seated, what happenes to the pressure gauge readings?
Low side pressure will go up. high side pressure will go down.
What are the colors of the high and low side gauges?
High- red/low Blue.
low side markings are in _______ increments?
1 pound increments
High side markings are in _________ increments?
5 pound increments
The center Hose and center chamber on the manifold is used to?
Recover & Charge Refrigerant, Evacuate System, Add oil.
The low side or compound gauge has temp scales and pressure scales indicating?
Inches of Vacuum and psig
The Manifold Gauges are useful as a diagnostic tool because they?
Indicate the operating pressures that correspond to the saturation temps.
If the system is using Schrader Core type access valves the manifold gauge pressure hose must have
Some way to depress the Valve stem core
Manifold gauge pressure hoses should be checked or replaced on a regular basis because.
With constant use they become less pliable and can develop leaks
TO read proper system operating pressures the Maniflod Gauge Valves should be.
Fully Front Seated