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HVAC: EPA 608 Certification Exam Questions and
Answers Latest Updated 2024/2025 (GRADED A+)
How many types of HVAC certifications are there? - (answers)There are 4 types.
What does a metering device do? - (answers)The metering device causes a
reduction in pressure, and therefore a reduction in saturation temperature.
What is absorbed in the evaporator? - (answers)Heat is absorbed in the
evaporator.
What happens in the evaporator? - (answers)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? - (answers)The refrigerant
is now a low temperature, low pressure vapor.
As the refrigerant expels heat, the refrigerant condenses to a what? - (answers)It
condenses to a liquid.
At the condenser outlet what pressure is the refrigerant? - (answers)The
refrigerant is a high pressure liquid.
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What is a metering device used for? - (answers)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? - (answers)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? - (answers)A receiver, which would be located in the liquid line directly
following the condenser.
The compound gauge is what color? - (answers)Blue.
The high pressure gauge is what color? - (answers)Red.
The blank measures low pressure (psig) and vacuum (inches Hg.). -
(answers)Compound gauge.
What does the high pressure gauge measure. - (answers)It measures high side
(discharge) pressure.
EPA regulations require that hoses be equipped with what? - (answers)Low loss
fittings that will minimize refrigerant loss when hoses are disconnected.
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The stratosphere is located where? - (answers)Between 10 and 30 miles above
sea level.
What is the stratosphere comprised of? - (answers)Ozone.
An Ozone molecule consists of what? - (answers)Three oxygen atoms (03).
What does Ozone protect us from? - (answers)Harmful ultraviolet radiation.
What does Ozone help maintain? - (answers)It helps maintain stable Earth
temperatures.
Depletion of Ozone in the stratosphere causes what? - (answers)Crop loss,
Increase in eye diseases, Skin cancer, Reduced marine life, Deforestation ,
Increased ground level ozone.
What depletes the ozone layer? - (answers)CFC's and HCFC's.
When a chlorine atom meets with an Ozone molecule, it takes how many Oxygen
atoms from the Ozone? - (answers)One.
When a chlorine atom meets with an Ozone molecule, it takes one Oxygen atom
from the Ozone. What compound does this form? - (answers)Chlorine Monoxide
(CIO). O2
HVAC: EPA 608 Certification Exam Questions and
Answers Latest Updated 2024/2025 (GRADED A+)
How many types of HVAC certifications are there? - (answers)There are 4 types.
What does a metering device do? - (answers)The metering device causes a
reduction in pressure, and therefore a reduction in saturation temperature.
What is absorbed in the evaporator? - (answers)Heat is absorbed in the
evaporator.
What happens in the evaporator? - (answers)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? - (answers)The refrigerant
is now a low temperature, low pressure vapor.
As the refrigerant expels heat, the refrigerant condenses to a what? - (answers)It
condenses to a liquid.
At the condenser outlet what pressure is the refrigerant? - (answers)The
refrigerant is a high pressure liquid.
,2|Page
What is a metering device used for? - (answers)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? - (answers)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? - (answers)A receiver, which would be located in the liquid line directly
following the condenser.
The compound gauge is what color? - (answers)Blue.
The high pressure gauge is what color? - (answers)Red.
The blank measures low pressure (psig) and vacuum (inches Hg.). -
(answers)Compound gauge.
What does the high pressure gauge measure. - (answers)It measures high side
(discharge) pressure.
EPA regulations require that hoses be equipped with what? - (answers)Low loss
fittings that will minimize refrigerant loss when hoses are disconnected.
, 3|Page
The stratosphere is located where? - (answers)Between 10 and 30 miles above
sea level.
What is the stratosphere comprised of? - (answers)Ozone.
An Ozone molecule consists of what? - (answers)Three oxygen atoms (03).
What does Ozone protect us from? - (answers)Harmful ultraviolet radiation.
What does Ozone help maintain? - (answers)It helps maintain stable Earth
temperatures.
Depletion of Ozone in the stratosphere causes what? - (answers)Crop loss,
Increase in eye diseases, Skin cancer, Reduced marine life, Deforestation ,
Increased ground level ozone.
What depletes the ozone layer? - (answers)CFC's and HCFC's.
When a chlorine atom meets with an Ozone molecule, it takes how many Oxygen
atoms from the Ozone? - (answers)One.
When a chlorine atom meets with an Ozone molecule, it takes one Oxygen atom
from the Ozone. What compound does this form? - (answers)Chlorine Monoxide
(CIO). O2
