HVAC (EPA CERTIFICATION EXAM SECTION 608) 2025
How many types of HVAC certifications are there? - ✅✅✅CORRECT -There are 4 types.
What does a metering device do? - ✅✅✅CORRECT -The metering device causes a reduction in
pressure, and therefore a reduction in saturation temperature.
What is absorbed in the evaporator? - ✅✅✅CORRECT -Heat is absorbed in the evaporator.
What happens in the evaporator? - ✅✅✅CORRECT -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? - ✅✅✅CORRECT -The refrigerant is now a
low temperature, low pressure vapor.
As the refrigerant expels heat, the refrigerant condenses to a what? - ✅✅✅CORRECT -It condenses
to a liquid.
At the condenser outlet what pressure is the refrigerant? - ✅✅✅CORRECT -The refrigerant is a high
pressure liquid.
What is a metering device used for? - ✅✅✅CORRECT -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? -
✅✅✅CORRECT -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? - ✅✅✅CORRECT
-A receiver, which would be located in the liquid line directly following the condenser.
, The compound gauge is what color? - ✅✅✅CORRECT -Blue.
The high pressure gauge is what color? - ✅✅✅CORRECT -Red.
The blank measures low pressure (psig) and vacuum (inches Hg.). - ✅✅✅CORRECT -Compound
gauge.
What does the high pressure gauge measure. - ✅✅✅CORRECT -It measures high side (discharge)
pressure.
EPA regulations require that hoses be equipped with what? - ✅✅✅CORRECT -Low loss fittings that
will minimize refrigerant loss when hoses are disconnected.
The stratosphere is located where? - ✅✅✅CORRECT -Between 10 and 30 miles above sea level.
What is the stratosphere comprised of? - ✅✅✅CORRECT -Ozone.
An Ozone molecule consists of what? - ✅✅✅CORRECT -Three oxygen atoms (03).
What does Ozone protect us from? - ✅✅✅CORRECT -Harmful ultraviolet radiation.
What does Ozone help maintain? - ✅✅✅CORRECT -It helps maintain stable Earth temperatures.
Depletion of Ozone in the stratosphere causes what? - ✅✅✅CORRECT -Crop loss, Increase in eye
diseases, Skin cancer, Reduced marine life, Deforestation , Increased ground level ozone.
What depletes the ozone layer? - ✅✅✅CORRECT -CFC's and HCFC's.
When a chlorine atom meets with an Ozone molecule, it takes how many Oxygen atoms from the
Ozone? - ✅✅✅CORRECT -One.
How many types of HVAC certifications are there? - ✅✅✅CORRECT -There are 4 types.
What does a metering device do? - ✅✅✅CORRECT -The metering device causes a reduction in
pressure, and therefore a reduction in saturation temperature.
What is absorbed in the evaporator? - ✅✅✅CORRECT -Heat is absorbed in the evaporator.
What happens in the evaporator? - ✅✅✅CORRECT -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? - ✅✅✅CORRECT -The refrigerant is now a
low temperature, low pressure vapor.
As the refrigerant expels heat, the refrigerant condenses to a what? - ✅✅✅CORRECT -It condenses
to a liquid.
At the condenser outlet what pressure is the refrigerant? - ✅✅✅CORRECT -The refrigerant is a high
pressure liquid.
What is a metering device used for? - ✅✅✅CORRECT -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? -
✅✅✅CORRECT -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? - ✅✅✅CORRECT
-A receiver, which would be located in the liquid line directly following the condenser.
, The compound gauge is what color? - ✅✅✅CORRECT -Blue.
The high pressure gauge is what color? - ✅✅✅CORRECT -Red.
The blank measures low pressure (psig) and vacuum (inches Hg.). - ✅✅✅CORRECT -Compound
gauge.
What does the high pressure gauge measure. - ✅✅✅CORRECT -It measures high side (discharge)
pressure.
EPA regulations require that hoses be equipped with what? - ✅✅✅CORRECT -Low loss fittings that
will minimize refrigerant loss when hoses are disconnected.
The stratosphere is located where? - ✅✅✅CORRECT -Between 10 and 30 miles above sea level.
What is the stratosphere comprised of? - ✅✅✅CORRECT -Ozone.
An Ozone molecule consists of what? - ✅✅✅CORRECT -Three oxygen atoms (03).
What does Ozone protect us from? - ✅✅✅CORRECT -Harmful ultraviolet radiation.
What does Ozone help maintain? - ✅✅✅CORRECT -It helps maintain stable Earth temperatures.
Depletion of Ozone in the stratosphere causes what? - ✅✅✅CORRECT -Crop loss, Increase in eye
diseases, Skin cancer, Reduced marine life, Deforestation , Increased ground level ozone.
What depletes the ozone layer? - ✅✅✅CORRECT -CFC's and HCFC's.
When a chlorine atom meets with an Ozone molecule, it takes how many Oxygen atoms from the
Ozone? - ✅✅✅CORRECT -One.
