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