HVAC (EPA Certification Exam Section 608)
How many types of HVAC certifications are there?
There are 4 types.
What does a metering device do?
The metering device causes a reduction in pressure, and therefore a reduction in saturation temperature.
What is absorbed in the evaporator?
Heat is ...
HVAC (EPA Certification Exam Section 608)
How many types of HVAC certifications are there?
There are 4 types.
What does a metering device do?
The metering device causes a reduction in pressure, and therefore a reduction in
saturation temperature.
What is absorbed in the evaporator?
Heat is absorbed in the evaporator.
What happens in the evaporator?
Heat is absorbed in the evaporator and causes the refrigerant to boil from liquid to
vapor.
At the outlet of the evaporator the refrigerant is what?
The refrigerant is now a low temperature, low pressure vapor.
As the refrigerant expels heat, the refrigerant condenses to a what?
It condenses to a liquid.
At the condenser outlet what pressure is the refrigerant?
The refrigerant is a high pressure liquid.
What is a metering device used for?
The metering device causes a reduction in pressure, and therefore a reduction in
saturation temperature.
A system that uses a capillary tube or fixed bore metering device is usually
equipped with a blank?
Accumulator which would be located in the suction line directly following the evaporator.
A system that uses a thermostatic expansion valve is usually equipped with a
what?
A receiver, which would be located in the liquid line directly following the condenser.
The compound gauge is what color?
Blue.
The high pressure gauge is what color?
Red.
The blank measures low pressure (psig) and vacuum (inches Hg.).
Compound gauge.
What does the high pressure gauge measure.
It measures high side (discharge) pressure.
EPA regulations require that hoses be equipped with what?
Low loss fittings that will minimize refrigerant loss when hoses are disconnected.
The stratosphere is located where?
Between 10 and 30 miles above sea level.
What is the stratosphere comprised of?
Ozone.
An Ozone molecule consists of what?
Three oxygen atoms (03).
What does Ozone protect us from?
Harmful ultraviolet radiation.
What does Ozone help maintain?
, It helps maintain stable Earth temperatures.
Depletion of Ozone in the stratosphere causes what?
Crop loss, Increase in eye diseases, Skin cancer, Reduced marine life, Deforestation ,
Increased ground level ozone.
What depletes the ozone layer?
CFC's and HCFC's.
When a chlorine atom meets with an Ozone molecule, it takes how many Oxygen
atoms from the Ozone?
One.
When a chlorine atom meets with an Ozone molecule, it takes one Oxygen atom
from the Ozone. What compound does this form?
Chlorine Monoxide (CIO). O2
A single Chlorine atom can destroy how many Ozone molecules?
100,000 Ozone molecules.
Volcanoes contribute a blank quantity of Chlorine as compared to CFC's?
A small quantity.
Will the chlorine in CFC's dissolve in water?
No.
What is Ozone Depletion Potential (ODP)?
A measurement of CFC's and HCFC's ability to destroy ozone.
What has the highest ODP?
CFC's.
What do not contain chlorine and have no Ozone Depletion Potential?
HFC's (R-134A).
What does CFC stand for?
Chlorine Fluorine Carbon.
What does HCFC stand for?
Hydrogen Chlorine Fluorine Carbon.
What does HFC stand for?
Hydrogen Fluorine Carbon.
What is R-134a?
Hydrogen Fluorine Carbon (HFC).
What is R-22 and R-123?
Hydrogen Chlorine Fluorine Carbon (HCFC).
What is R-11, R-12, and R-500?
Chlorine Fluorine Carbon (CFC).
Who regulates section 608 of the Federal Clean Air Act?
The Environmental Protection Agency (EPA).
Failure to comply with section 608 of the Federal Clean Air Act could cost what?
Failure to comply could cost you and your company as much as $27,500. per day, per
violation and there is a bounty of up to $10,000.
It is a violation of Section 608 to vent CFC's or HCFC's since what date?
July 1, 1992.
It is a violation of Section 608 to vent HFC's since what date?
November 15, 1995.
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